Tag: M.W=250-300

Bryuzgin, Evgeny published the artcileThe Superhydrophobic State Stability of Coatings Based on Copolymers of Glycidyl Methacrylate and Alkyl Methacrylates on Cotton Fabric Surface, Safety of Dodecyl 2-methylacrylate, the main research area is glycidyl alkyl methacrylate copolymer cotton fabric coating.

We suggest a simple and reproducible strategy for fabricating durable superhydrophobic coatings on the basis of series of functional random copolymers of alkyl methacrylates and glycidyl methacrylate on cotton fabric surface. The procedure consists of the fabric treatment by solutions of copolymers in methylethylketone and following heating at 140°C. The initial contact angles of obtained coatings on fabric surface achieve 165°. The dependence of superhydrophobic properties of coatings based on copolymers of glycidyl methacrylate and alkyl (meth)acrylates (with alkyl radicals C4-C18 in side chains) attached to the cotton fabric surface was studied. The comparative anal. of superhydrophobic state stability of polymer coatings during long-term contacts with aggressive media is presented. We evaluated the contact angles stability as a function of prolonged contact of polymer coatings with water under saturated vapor conditions, organic solvents, and synthetic detergents. Polymeric coatings based on a copolymer of lauryl methacrylate (C12) and glycidyl methacrylate provide better stability of superhydrophobic properties compared with other copolymers of alkyl methacrylates.

Fibers and Polymers published new progress about Absorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Safety of Dodecyl 2-methylacrylate.

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

Xiang, Ming-Yue published the artcileLimited Fraction of Crystallized Side Chains in Bottlebrush Poly(n-alkyl methacrylate)s, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is bottle brush polyalkyl methacrylate crystallization side chain.

Crystallinity of bottlebrush polymers due to side chain crystallization has been considered to be related to the length of the side chains only under the assumption of complete participation of crystallization by all side chains. Recent exptl. results revealed that in poly(n-alkyl methacrylate)s a fraction of side chains could not crystallize due to constraints imposed by the trapped main chain entanglements and required expansion of main chain-main chain distance. This result renders the original simplified consideration of the origin of crystallinity in bottlebrush polymers questionable. In this work, we introduce a new parameter fc, the fraction of crystallizable side chains, to better describe the crystallinity of bottlebrush polymers. A linear relationship between the melting enthalpy and the number of alkyl groups in side chains for bottlebrush polymers reported repeatedly indicates that fc remains essentially unchanged when bottlebrush polymers had the same main chain structure and grafting degree but different side chain lengths. The slope of the above-mentioned linear relationship is thus ΔHCH2 × fc, where ΔHCH2 stands for the melting enthalpy of one mole alkyl group packed into the crystal. With a known value of fc, it is possible to estimate the value of ΔHCH2. In case of poly(n-alkyl methacrylate)s, we estimated ΔHCH2 of hexagonal crystal being at most 5.74 kJ/mol with the knowledge of possibly smallest fc of 0.67 obtained from small angle X-ray scattering data. Therefore, the crystallinity of bottlebrush polymer would be calculated based on the equation Xc = fc × (Nc/N) with N and Nc being the number of alkyl groups in a side chain and those packed in the crystalline structure, resp. Both chem. structure and grafting degree of bottlebrush polymers affect fc.

Chinese Journal of Polymer Science published new progress about Callistemon. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Recommanded Product: Dodecyl 2-methylacrylate.

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

Xu, Xuetao published the artcileOil-polluted water purification via the carbon-nanotubes-doped organohydrogel platform, Formula: C16H30O2, the main research area is carbon organohydrogel thermal management solar driven water purification.

Solar-driven evaporators are promising for tackling freshwater scarcity but still challenged in simultaneously realizing comprehensive performances at one platform for sustainable and efficient application in real-world environments, such as stable-floating, scalability, salt-resistance, efficient vaporization, and anti-oil-fouling property. Herein, we design a hybrid organohydrogel evaporator to achieve the enduring oil contamination repulsion with maintaining accelerated evaporation process, and integrate capacities of ultra-stable floating, hindered salt-crystallization, large-scale fabrication for practical purification of seawater and polluted solutions The raised water surface surrounding evaporators, induced by low d. of organogel-phase, results in oil contamination resistance through the lateral capillary repulsion effect. Meanwhile, the organogel-phase containing photo-thermal carbon-nanotubes with low thermal capacity and conduction can form locally confined hot dots under solar irradiation and reduce heat dissipation on heating excessive water. Therefore, based on this approach, accelerated long-term practical purification of oil-contaminated solutions without any extra disposal is realized. Considering other properties of ultra-stable floating, large-scale fabrication, and anti-salt crystallization, these innovative organohydrogel evaporators open pathways for purifying oil-slick-polluted water via interfacial evaporation and are anticipated accelerating industrialization of efficient and sustainable solar-driven water purification

Nano Research published new progress about Capillarity. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Formula: C16H30O2.

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

Shibata, Motoki published the artcileMicellar aggregation and thermogelation of amphiphilic random copolymers in water hierarchically dependent on chain length, Related Products of esters-buliding-blocks, the main research area is micellar aggregation amphiphilic polymethacrylate hierarchical.

Micellar aggregates and thermoresponsive gelation of amphiphilic random copolymers in water were examined in detail, focused on effects of the d.p. (DP) on the behavior. For this purpose, we designed random copolymers carrying hydrophilic poly(ethylene glycol) and hydrophobic dodecyl groups, where the DP was varied from 63 to 358. The content of the hydrophobic monomer was set to 60 mol% to facilitate thermogelation. All the copolymers formed multichain aggregates in water, while the size distribution depended on DP. Since copolymers with larger DP had less composition distribution, the copolymers with 145 or more of DP formed size-controlled aggregates in water. Their concentrated solutions, above the overlap concentration of the aggregates, gelled entirely upon heating, followed by syneresis. In contrast, the short copolymer with 63 of DP formed aggregates with multimodal size distribution, and the concentrated solution underwent macroscopic phase separation upon heating, followed by gelation of the polymer-rich lower layer. As confirmed by small-angle neutron scattering, the copolymer suitable for thermogelation originally formed aggregates consisting of multiple micelle subunits in the aqueous dilute solution, and the thermogelation of the concentrated solution was driven by the phys. packing of the micelle subunits upon heating. Thus, we revealed that the DP hierarchically affected not only the self-assembly of the copolymers into size-controlled micellar aggregates in water but also the thermogelation of the concentrated solutions via intermicellar association

European Polymer Journal published new progress about Cloud point. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Related Products of esters-buliding-blocks.

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

Liu, Ya published the artcileGelator-Enhanced Organohydrogels with Switchable Mechanics and High-Strain Shape-Memory Capacity, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is gelator organogel hydrogel.

Hydrogels and organogels, as two crucial representatives of soft materials, have attracted immense interest. However, they develop independently along two parallel lines, and these gels with single networks have their inherent drawbacks. For example, hydrogels tend to freeze, and organogels are usually brittle. Herein, organogels were incorporated into a hydrogel matrix for the synthesis of organohydrogels GOHs through polymerization in Pickering emulsion. The rigid organogel domains contribute to enhancing the strength of organohydrogels. Besides this, the organogels derived from 12-HAS self-assembly behavior exhibit a gel-sol transition when the temperature reaches 70°C, thus leading to a thermo-softening behavior in the GOHs. Due to the phase transition of organogel domains and the elastic hydrogel network, the resultant organohydrogels demonstrate high-strain shape-memory performance (over 1000%) which could help achieve full recovery in seconds. Consequently, GOHs are endowed with the potential of practical application in soft robots, wearable devices, and biol. materials.

Langmuir published new progress about Compression. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Recommanded Product: Dodecyl 2-methylacrylate.

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

Liu, Hongpeng published the artcileShear deformation response of a holographic sensor based on elastic poly(MMA-co-LMA) photopolymer, HPLC of Formula: 142-90-5, the main research area is methyl lauryl methacrylate Shear photopolymer diffraction wavelength.

A holog. sensor based on camphorquinon doped poly (Me methacrylate-co-lauryl methacrylate) (poly (MMA-co-LMA)) elastic photopolymer is developed for characterizing the shear deformation of material. A shear angle and its transverse displacement, which are induced by a couple of shear stresses, are analyzed using a diffraction spectrum of a transmission holog. sensor. The dependence of the peak wavelength shift on the shear deformation presents a good linear relationship which provides a quant. characterization means. The detectable maximum of the shear angle exceeds 26.1 deg, and the peak wavelength shift closes to 4.0 nm. The available sensitivity is better than 3.33 deg/0.5 nm (shear angle/wavelength shift) using a com. spectrometer with 0.5 nm of resolution Finally, the reversibility response of shear deformation further confirmed the practical applicability of the elastic polymerbased shear deformation sensor. The spectrum measurement of shear deformation provides a novel measurement means for the mech. deformation of materials and expands the application of a holog. sensor.

Optics Letters published new progress about Diffraction. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, HPLC of Formula: 142-90-5.

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

Liao, Pei-Han published the artcileOn-Line Coupling of Simultaneous Distillation-Extraction Using the Likens-Nickerson Apparatus with Gas Chromatography, Formula: C17H34O2, the main research area is coupling simultaneous distillation extraction gas chromatograph mass spectrometer ester.

Simultaneous distillation-extraction (SDE) using the Likens-Nickerson apparatus is a convenient technique used to isolate volatile organic compounds (VOCs) from complex liquid matrixes. The technique combines steam distillation with solvent extraction While anal. extractions are normally followed by off-line separation/detection, it is advantageous to couple extractions online with separation and detection systems that are employed in the same anal. workflow. Here, we have coupled the Likens-Nickerson apparatus online with a gas chromatograph hyphenated with a mass spectrometer. For that purpose, we have devised an automated liquid transfer setup comprising a peristaltic pump, control unit, customized transfer vial with a drain port, and an autosampler arm to deliver liquid extract aliquots at defined time points. The online SDE-GC/MS system enables one to record real-time extraction profiles. These profiles reveal extraction kinetics of various VOCs present in the extracted samples. The data sets were fitted with the first order kinetic equation to obtain numeric values characterizing the extraction process (rate constants ranging from 0.21 to 0.01 min-1 for the Et esters from C6 to C19). A comparison of online and off-line results reveals that the online system is more dependable, while the off-line anal. leads to artifacts. To demonstrate the operation of the online SDE-GC/MS system, we performed analyses of selected real samples (beer). The real-time data sets revealed extraction kinetics for VOCs present in these samples. The devised extraction-anal. system allows the analysts to make an evidence-based decision on the extraction time for different groups of analytes in order to maximize extraction yield and minimize analyte losses.

Analytical Chemistry (Washington, DC, United States) published new progress about Beer. 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Formula: C17H34O2.

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

Jimenez Saelices, Clara published the artcileSynthesis of latex stabilized by unmodified cellulose nanocrystals: the effect of monomers on particle size, Name: Dodecyl 2-methylacrylate, the main research area is cellulose nanocrystal stabilized polymer latex nanocomposite suspension polymerization property.

Cellulose nanocrystals (CNCs) are sustainable rod-shaped nanoparticles able to adsorb at oil-water interfaces to produce highly stable Pickering emulsions with enhanced mech. properties. Polymerization of the CNC-stabilized monomer droplets is investigated in detail to elucidate the synthesis mechanism of both micro- and nanoparticles of latex in relationship with the initial sizes of the droplets. It is shown in this study that unmodified CNCs, used as a sole stabilizer, are efficient to produce both monomer-in-water Pickering emulsion and nanocomposite latex particles with controlled dimensions. For the initial liquid emulsion of styrene, two populations of droplets were observed: micrometric droplets with diameters that decrease down to 5 μm with increasing CNC concentrations, and nanometric droplets with a diameter distribution ranging from 500 nm to 2 μm for all CNC concentrations It leads to two distinct populations of polystyrene latex particles by polymerization in aqueous dispersed media, i.e. microparticles of 5-18 μm and nanoparticles with an average diameter below 1 μm. The polymerization of various monomers, i.e. styrene, lauryl methacrylate, isobornyl acrylate, Bu methacrylate, and Me methacrylate, in the presence of different initiators indicated that the solubility of the monomer in the aqueous continuous phase is the key parameter to tune the size distribution of the latex particles. Nanocomposite CNC-stabilized waterborne latexes were prepared from polymers with different glass transition temperatures

Polymer Chemistry published new progress about Drops. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Name: Dodecyl 2-methylacrylate.

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

Tang, Zhong-Sheng published the artcileCharacterization of aroma profile and characteristic aromas during lychee wine fermentation, Product Details of C17H34O2, the main research area is lychee wine fermentation citronellol methionol rose oxide aroma.

Characteristic aroma substances of cis-rose oxide imparts the odorant of “”lychee-like,”” while of citronellol is the precursor of it in lychee. The characterization of volatiles of lychee wine fermentation using headspace solid-phase microextraction gas chromatog.-mass spectrometry combined with headspace gas chromatog.-ion mobility spectrometry were done to regulate processing. Results indicated that the total of 97 volatiles (38 in common) were observed during fermentation, including 39 terpenoids, 5 alcs., 22 esters, 4 acids, 7 alkenes, 4 ketones and ethers, 3 sulfur compounds and others. Losses of characteristic aromas mainly occurred during primary fermentation more than threefold decrease. The volatility of cis-rose oxide was stronger than citronellol, which implied that more gentle processing should be performed to protect lychee flavor. Cis-rose oxide was a mixture of monomer and dimer with unequal proportion, while citronellol was a monomer in lychee. The work provides important new information on aroma development during fermentation Practical applications : Fruit consumption, among which tropical fruit-based products have gained huge popularity in the recent years. The main high value-added processed products of lychee pulp are lychee wine and vinegar; however, the typical aroma always decreased or disappeared during fermentation Therefore, this study aims at providing more information for product improvement and process development.

Journal of Food Processing and Preservation published new progress about Litchi. 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Product Details of C17H34O2.

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

Wei, Shuwei published the artcileThe effect of different potassium fertilizers on fruit flavor quality of ‘Xinliqihao’ pear, Product Details of C17H34O2, the main research area is Pyrus fruit quality flavor potassium.

This study was conducted to investigate the effects of different types of potassium fertilizers on the flavor and quality of pear fruit. [Methods] With ‘ Xinliqihao’ as a research object, such three treatments as potassium sulfate (T1), potassium nitrate (T2) and potassium chloride (T3) were set up, with no application of potassium fertilizer as control (CK). The total acid content of ‘ Xinliqihao’ fruit treated with different types of potassium fertilizers was higher than that of the control. The total acid content of the potassium nitrate treatment was the highest, which was 103.68% higher than that of the control, sequentially followed by the potassium sulfate treatment and the potassium chloride treatment. Both the control and potassium treatments of ‘ Xinliqihao’ had the highest malic acid content, and except the potassium chloride treatment with the lowest fumaric acid content, other treatments all had the lowest tartaric acid content. Different types of potassium fertilizer treatments had different effects on the organic acid content of ‘ Xinliqihao ‘ fruit. The types and contents of volatile aroma substances in the fruit of ‘Xinliqihao’ treated with potassium fertilizers were significantly liiglier than the control. The aroma substances in ‘Xinliqihao’ differed among different potassium fertilizer treatments.

Agricultural Biotechnology published new progress about Flavor. 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Product Details of C17H34O2.

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