Tag: 1100-1200

Single-Use Face Masks as a Potential Source of Synthetic Antioxidants to the Environment was written by Liu, Runzeng;Mabury, Scott A.. And the article was included in Environmental Science & Technology Letters in 2021.HPLC of Formula: 6683-19-8 This article mentions the following:

Single-use face masks are a powerful tool for reducing the spread of COVID-19. The usage of single-use face masks has increased enormously since the start of the COVID-19 pandemic, and pollution from the huge volume of discarded single-use face masks may become an environmental issue. This study focuses on synthetic antioxidants (AOs), including synthetic phenolic antioxidants (SPAs) and organophosphite antioxidants (OPAs), used in single-use 3-layer face masks. Both SPAs and OPAs were detected in single-use face masks, with total concentrations ranging 20.0-575μg/g (median of 175μg/g). The dominant congeners detected in the face masks were tris(2,4-di-tert-butylphenyl) phosphite (AO168, median of 83.2μg/g), tris(2,4-di-tert-butylphenyl) phosphate (AO168O, median of 72.9μg/g), and pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (AO1010, median of 13.7μg/g). No significant concentration difference was observed between medical and nonmedical face masks. Among the 3 different layers of the face masks, the middle layers showed the highest AO concentrations On the basis of the median concentrations detected, we estimate that 1084 tons of AOs is used in face masks annually, suggesting that discarded face masks may be a source of AOs to the environment. This is the 1st study to report the occurrence of a wide range of AOs in face masks. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8HPLC of Formula: 6683-19-8).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.HPLC of Formula: 6683-19-8

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Thin film composite solvent resistant nanofiltration membrane via interfacial polymerization on an engineered polyethylene membrane support coated with polydopamine was written by Heidari, Ali Akbar;Mahdavi, Hossein;Khodaei kahriz, Peyman. And the article was included in Journal of Membrane Science in 2021.Computed Properties of C73H108O12 This article mentions the following:

In this work, a thin film composite (TFC) membrane possessing outstanding properties for solvent resistant nanofiltration (SRNF) membrane application was fabricated. For this purpose, high d. polyethylene (HDPE)-polystyrene (PS)-styrene-ethylene-butylene-styrene (SEBS) blends were fabricated in the first step with different compositions by using an internal mixer machine and hot press technique, resp. Then, the fabrication of a novel HDPE support was conducted by etching the PS phase out of the as-prepared HDPE-PS-SEBS blends through solvent extraction method (Etched HDPE). In the next step, the prepared Etched HDPE membrane support was dipped in a dopamine solution, by which auto-oxidization and self-polymerization of dopamine monomers onto the Etched HDPE membrane supports surface was done, leading to the formation of an ultrathin polydopamine (PDA) layer with a strong chem. binding force. By the formation of the polydopamine layer, hydrophilic functional groups were introduced onto the HDPE membranes surface_, causing the attraction of m-phenylenediamine (MPD) monomers onto the membrane surface and the formation of a uniform ultrathin PA top layer. Finally, the TFC layer was formed on the as-prepared membrane supports with different m-phenylenediamine and trimesoyl chloride (TMC) concentrations The performance and properties of the prepared TFC-PE@PDA membrane was investigated for rejection of different dyes including Reactive Red, Direct Yellow, Methyl blue, Rhodamine B, Crystal Violet and Methyl orange in SRNF applications, based on which outstanding separation performance (dye rejections of 99.8, 99.5, 99.2, 98.5, 96.8 and 94.4 for RR, DY, MB, RDB, CV and MO, resp., under the pressure of 9 bar), methanol flux as high as 1.8 L/m² h bar along with excellent methanol flux as high as 3.7 L/m² h bar after DMF activation, were obtained. Furthermore, it is noteworthy that an outstanding solvent resistance (dye rejections of more than 99.2, 98.8, 98.5, 97.9, 96 and 93.8% for RR, DY, MB, RDB, CV and MO, resp., being dipped in DMF at 70°C for 90 days) was also shown by the prepared TFC-PE@PDA membrane. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Computed Properties of C73H108O12).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Computed Properties of C73H108O12

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Polystyrene/sepiolites nanocomposite foams: Relationship between composition, particle dispersion, extensional rheology, and cellular structure was written by Ballesteros, A.;Laguna-Gutierrez, E.;Puertas, M. L.;Esteban-Cubillo, A.;Santaren, J.;Rodriguez-Perez, M. A.. And the article was included in Materials Today Communications in 2021.Electric Literature of C73H108O12 This article mentions the following:

The main objective of this work is to analyze how the cellular structure of foamed polystyrene based (PS) nanocomposites, produced by gas dissolution foaming, is affected by the extensional rheol. behavior of the polymer matrix and by the dispersion degree of the particles. These composites have been produced with different types of natural and organomodified sepiolites and with different contents of these particles. The extensional behavior and the dispersion degree were characterized by extensional and shear dynamic rheol. resp. The results obtained indicate that the extensional rheol. behavior controls the foam degeneration mechanisms; meanwhile, the way in which the particles are dispersed in the PS matrix controls the nucleation mechanisms. Results also indicate that, in these systems, the characteristics of the cellular structure are mainly defined by the way in which nucleation occurs. Therefore, improving the dispersion degree is a key approach to reduce the cell size by 90%, with respect to the pure polymer. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Electric Literature of C73H108O12).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Electric Literature of C73H108O12

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Hydrophilic Nanocomposite Films with a Fence-Structure-Induced Labyrinth Effect for Greenhouse Cooling and Light Enhancement was written by Shi, Shaoze;Zhang, Pan;Chu, Xiaohong;Xu, Wang;Song, Qiuxian;Liu, Yihan;Feng, Wenli;Sun, Baohong;Wang, Jia;Zhou, Ninglin. And the article was included in Langmuir in 2022.Recommanded Product: 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) This article mentions the following:

In this paper, we reported a new kind of cooling and light-enhanced hydrophilic nanocomposite film (PE/JW-0.8%) with low-d. polyethylene (LDPE) as the substrate. The wetting, photophys., and mech. properties of PE/JW-0.8% were tested. The emission band of the fluorescence centers at 420 nm, which is perfectly consistent with the absorption spectrum of plant photosynthesis. In addition, light can be scattered by PE/JW-0.8% to achieve a larger light distribution area. PE/JW-0.8% showed a good durability of hydrophilicity in the water rinsing test. Meanwhile, the elongation at the break of the film was significantly increased. Benefiting from the fence structure induced labyrinth effect, a maximum reduction of 6.7°C in temperature monitoring for PE/JW-0.8% was observed in the detailed field experiments Light intensity monitoring showed that light intensity in PE/JW-0.8% increased by a maximum of 57.1% compared to PE/LH. In the biol. quality anal. of melon, it was found that the soluble sugar, soluble solid, and vitamin C content of melon increased by 13.34, 22.96, and 50.95%, resp. In conclusion, these results confirm that PE/JW-0.8% has great application potential in the field of facility agriculture, buildings, and photovoltaic modules. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Recommanded Product: 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate)).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Recommanded Product: 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate)

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

The influence of ammonium and phosphonium salts on natural rubber vulcanization with experimental and commercial accelerators was written by Albuini-Oliveira, Nathalia M.;Rubinger, Mayura M. M.;Rabello, Anderson S.;Vidigal, Antonio E. C.;Visconte, Leila L. Y.;Lopes, Thiago C.;Silva, Ana L. N.. And the article was included in Polymer Bulletin (Heidelberg, Germany).Product Details of 6683-19-8 This article mentions the following:

The influence of eight different quaternary ammonium and phosphonium salts on the vulcanization of natural rubber was investigated. The central atom (P or N) of the cation was of minor importance, but the nature of the organic chains greatly affected the rheometrical parameters of the process and the mech. properties of the vulcanizates. Studies of rubber compositions containing binary mixtures of a quaternary salt and the com. accelerators ZDEC, TBBS, TMTD and MBTS showed a synergistic effect, mainly with TBBS and MBTS. With such binary systems, it is possible to reduce the amount of accelerator and improve the vulcanization parameters and the quality of the vulcanized rubber. The anionic complex bis(N-phenylsulfonyldithiocarbimato)zincate(II) (Z), one amine-free exptl. accelerator, was prepared and isolated as tetrabutylammonium (B₂Z) and benzyltriphenylphosphonium (H₂Z) salts. The H₂Z complex salt is a new substance and behaved as an ultra-accelerator, being faster than ZDEC and TMTD. B₂Z was a medium rate accelerator, being faster than TBBS and similar to MBTS. In addition, the tensile and tear strength of the specimens vulcanized with the zinc-dithiocarbimate salts were superior when compared to compositions containing the com. accelerators. The differences in the behavior of B₂Z and H₂Z showed that the zinc-dithiocarbimates are versatile accelerators for natural rubber as the process and the quality of the vulcanizate can be modulated by the choice of the cation. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Product Details of 6683-19-8).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Product Details of 6683-19-8

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

A smart composite coating with photothermal response, anti-UV and anti-corrosion properties was written by Sun, Yue;Yuan, Sicheng;Fan, Weihao;Lin, Dan;Zhang, Kun;Bai, Ziheng;Zhu, Yanji;Wang, Huaiyuan. And the article was included in Chemical Engineering Journal (Amsterdam, Netherlands) in 2023.Product Details of 6683-19-8 This article mentions the following:

In order to obtain high corrosion protection coatings and break the bottleneck of epoxy (EP) in the loss of UV radiation mech. properties and phys. shielding, we report herein a smart composite coating approach. Ce ion-intercalated montmorillonite (M-Ce) provides reaction sites for 2-fluoroaniline polymerization (PFA), and their nanohybrids (PFAM-Ce) are used as effective additives to improve the anti-corrosion and anti-UV properties of EP coating. In terms of UV resistance mechanism, the free radical scavenging of PFAM-Ce conducted by the DPPH radical activity test. And UV absorption of PFAM-Ce is investigated by photometric system. Addnl., we found that the EP coating was loaded with 2 wt% PFAM-Ce, and the composite coating quickly achieved light-to-heat conversion. In contrast to conventional epoxy-based composites, the functionalized MMT based EP composites show a significant improvement in corrosion resistance under UV radiation, that is passing the 500-h weatherproof test (B-SUN-II) and 90-day 3.5 wt% NaCl immersion electrochem. testing. The results reveal that the uniformly dispersed PFAM-Ce in the fracture surface of the coating could provide the phys. shielding, anodic protection and cathodic inhibition on the steel substrates. This provides a new method for the enhancement of UV resistance of epoxy coatings and reveals the importance of functionalized polyaniline in anti-UV and anti-corrosion. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Product Details of 6683-19-8).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Product Details of 6683-19-8

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Improving the adhesion and properties in the material extrusion of polypropylene by blending with a polyolefin elastomer was written by Ho, Quang Binh;Kontopoulou, Marianna. And the article was included in Additive Manufacturing in 2022.SDS of cas: 6683-19-8 This article mentions the following:

We examine the effect of the thermorheol. properties of polypropylene (PP) on its material extrusion characteristics using a 3D printer. Rheol. characterization showed that PP with higher viscosity exhibited low extrusion rates during printing and suffered significant pressure drop. All PP grades tested suffered from warpage in the built structures, and debonding of individual strands under tensile deformation. Blending 20-40 wt% of an elastomeric ethylene-octene copolymer (EOC) with PP improved the flow properties and the interfacial fusion. Investigation into the morphol. and thermal properties of the blends showed that owing to its amorphous structure and low m.p., the EOC dispersed phase facilitated the material extrusion process, reduced warpage, and promoted fusion between the printed strands, improving the mech. properties. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8SDS of cas: 6683-19-8).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.SDS of cas: 6683-19-8

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthesis and properties of polypropylene-graphene nanocomposite was written by Rishaban, R.;Balakrishnan, G.;Hema, R.. And the article was included in Materials Today: Proceedings in 2022.Category: esters-buliding-blocks This article mentions the following:

Graphene being 2D crystalline material has attracted broad and deep interest all over the world due to its good phys., chem., mech. and elec. property with high shape asymmetry. Fabrication of high-quality graphene is becoming increasingly important to work on its various properties and application prospects. Recent progress on the hybrid material-based nanomaterial has greater prospects in many applications. In this investigation, com. graphite powder is preferred as the precursor and two different solvents showing different exfoliation efficiencies, i.e., N-Methyl-2-pyrrolidone and 1-Methylnaphthalene are employed as exfoliation media. Ball milling technique, known to have successfully produced nanomaterials in large scale, is employed in this work to produce multi- layered graphene sheets. Multi-layer graphene’s are made with high aspect ratio with modifications in process parameter. The exfoliated multi-layered graphene is incorporated as filler material with polypropylene matrix to develop polymer nanocomposites. The enhanced mech. stability of the polypropylene/graphene nanocomposite and its resp. morphol. is studied in this work which has applications in photovoltaics, electronic devices and facial reconstruction. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Category: esters-buliding-blocks).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Determination of the Influence of Multiple Closed Recycling Loops on the Property Profile of Different Polyolefins was written by Langwieser, Johanna;Schweighuber, Andrea;Felgel-Farnholz, Alexander;Marschik, Christian;Buchberger, Wolfgang;Fischer, Joerg. And the article was included in Polymers (Basel, Switzerland) in 2022.Category: esters-buliding-blocks This article mentions the following:

In a circular economy, polymeric materials are used in multiple loops to manufacture products. Therefore, closed-loops are also envisaged for the mech. recycling of plastics, in which plastic is used for products that are in turn collected and reprocessed again and again to make further products. However, this reprocessing involves degradation processes within the plastics, which become apparent through changes in the property profile of the material. In the present paper, the influence of multiple recycling loops on the material properties of four different polyolefins was analyzed. Two different closed-loop cycles with industrially sized processing machines were defined, and each polyolefin was processed and reprocessed within the predefined cycles. For the investigation of the effect of the resp. loops, samples were taken after each loop. The samples were characterized by high-pressure liquid chromatog. coupled to a quadru-pole time-of-flight MS, high-temperature gel permeation chromatog., melt flow rate measurements, IR spectroscopy, DTA, and tensile tests. With increasing number of processing loops, the tested polyolefins showed continuous material degradation, which resulted in significant changes in the property profiles. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Category: esters-buliding-blocks).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Solid-state hydroxylation of polypropylene was written by Petrus, Josef;Korcuskova, Martina;Kucera, Frantisek;Jancar, Josef. And the article was included in Materials Today Communications in 2022.Computed Properties of C73H108O12 This article mentions the following:

The solid-state hydroxylation of polypropylene (PP) in water solution was investigated as a simple and attractive way for the surface hydroxylation of PP. The functionalization was initiated by potassium persulfate (K₂S₂O₈) under inert atm. The effect of various reaction parameters and surfactants on the concentration of -OH group bonded on PP backbone ([OH]_PP) and the extent of collateral reactions was discussed. The increase of [OH]_PP with the increase of initial concentration of K₂S₂O₈ ([K₂S₂O₈]₀) was proved by Fourier transform IR spectroscopy (FTIR) and XPS. β-scission and oxidative degradation of PP was detected with respect to the change of rheol. behavior, differential scanning calorimetry (DSC) and FTIR. On the other hand, inverse collateral reaction leading to the increase of molar mass were evidenced at prolonged reaction period. Surface hydroxylation was detected mainly in the amorphous phase, however at prolonged reaction period the reaction occurred even in the crystalline phase. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Computed Properties of C73H108O12).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Computed Properties of C73H108O12

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics