Tag: M.W=250-300

Matsumoto, Mayuko published the artcileOrthogonal Folding of Amphiphilic/Fluorous Random Block Copolymers for Double and Multicompartment Micelles in Water, Related Products of esters-buliding-blocks, the main research area is folding amphiphilic fluorous random copolymer micelle.

Here, we report orthogonal folding and self-assembly systems of amphiphilic/fluorous random block copolymers for double core and multicompartment micelles in water. For this, we developed the precision folding techniques of polymer chains via the selective self-assembly of the pendant groups. Typically, A/C-B/C random block copolymers were designed: Hydrophobic dodecyl groups (A) and fluorous fluorinated octyl groups (B) were introduced into the resp. blocks, while hydrophilic poly(ethylene glycol) chains (C) were randomly incorporated into all the segments. By controlling the chain length and composition of the resp. blocks, the copolymers induce orthogonal single-chain folding in water to form double-compartment micelles comprising hydrophobic and fluorous cores. The copolymers were site-selectively folded in a fluoroalc. to result in tadpole unimer micelles comprising a hydrophobic A/C unimer micelle and an unfolded fluorous B/C chain. Addnl., asym. A/C-B/C random block copolymers with short and highly hydrophobic or fluorous segments were effective for multicompartment micelles in water.

ACS Macro Letters published new progress about Acrylic polymers, polyoxyalkylene-, fluorine-containing, block, triblock, graft Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 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

Seo, Jin Young published the artcilePorphyrin-cored amphiphilic star block copolymer photocatalysts: Hydrophobic-layer effects on photooxidation, HPLC of Formula: 142-90-5, the main research area is porphyrin amphiphilic star block copolymer photocatalyst photooxidation.

Pd-contained porphyrin-cored (P(Pd)) amphiphilic star block copolymers with a hydrophobic interior, including either poly(Me methacrylate) (PMMA) or poly(dodecyl methacrylate) (PDMA), and poly(ethylene glycol) Me ether methacrylate (PEGMA) hydrophilic outer layer were synthesized by Ru-catalyzed atom transfer radical polymerization (ATRP). The acquired star polymer photocatalysts were examined for photooxidation of furfural. The star polymers with the PDMA hydrophobic interior led to higher efficiency in the photooxidation of furfural than the star polymers without hydrophobic interior and with the PMMA interior. In addition, the grater hydrophobic PDMA fraction exhibited a higher photooxidation efficiency. Those exptl. demonstrated the importance of the hydrophobic interior toward efficient photooxidation We believe that this study provides a fundamental idea in developing amphiphilic star block copolymer photocatalysts.

Materials Letters published new progress about Amphiphiles. 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

Nykaza, Trevor V. published the artcilePIII/PV=O Catalyzed Cascade Synthesis of N-Functionalized Azaheterocycles, Application of Methyl 2-(4,5-dimethoxy-2-nitrophenyl)acetate, the main research area is azaheterocycle preparation organophosphorus catalyst cascade; cross-coupling; cyclization; nitrogen heterocycles; organocatalysis; phosphorus.

An organocatalytic method for the modular synthesis of diverse N-aryl and N-alkyl azaheterocycles (indoles, oxindoles, benzimidazoles, and quinoxalinediones) is reported. The method employs a small-ring organophosphorus-based catalyst (1,2,2,3,4,4-hexamethylphosphetane P-oxide) and a hydrosilane reductant to drive the conversion of ortho-functionalized nitroarenes into azaheterocycles through sequential intermol. reductive C-N cross coupling with boronic acids, followed by intramol. cyclization. This method enables the rapid construction of azaheterocycles from readily available building blocks, including a regiospecific approach to N-substituted benzimidazoles and quinoxalinediones.

Angewandte Chemie, International Edition published new progress about Benzimidazoles Role: SPN (Synthetic Preparation), PREP (Preparation). 2982-53-8 belongs to class esters-buliding-blocks, name is Methyl 2-(4,5-dimethoxy-2-nitrophenyl)acetate, and the molecular formula is C11H13NO6, Application of Methyl 2-(4,5-dimethoxy-2-nitrophenyl)acetate.

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

Hamulic, Damir published the artcileThe influence of length of alkyl chain on the chemical structure and corrosion resistance of silica-polyacrylic hybrid coatings on structural steel, Product Details of C16H30O2, the main research area is methacrylic polysiloxane anticorrosive coating transparency morphol wettability impedance.

Hybrid coatings were prepared, via a sol-gel route from 3-(trimethoxysilyl)propyl methacrylate (MAPTMS), tetra-Et orthosilicate (TEOS), and derivatives of methacrylate (methyl-, ethyl-, butyl-, hexyl-, octyl- and dodecyl methacrylate). The main goal of this study was to evaluate how the length of the alkyl chain of the ester part of a methacrylate influences the anti-corrosion property of the coatings. Fourier transform IR spectroscopy, NMR spectroscopy, contact angle measurements, and SEM with chem. anal. were used to determine the chem. composition, structure, wettability and morphol. of the coatings. The contact angle of the coatings increased from methyl- to butyl-containing coating (from 60° up to 80°); at the same time the surface free energy decreased. For longer chains, a plateau was reached (≈75°), which was in contrast to the prediction that a longer chain would result in reduced wettability due to its nonpolar alkyl part. The anti-corrosion behavior in 3.5 weight % NaCl of the coatings deposited on structural steel was studied by electrochem. impedance spectroscopy. The coatings with Et and Bu groups exhibited the best anti-corrosion performance and remained intact over six months of immersion. The related values of impedance magnitude at low frequency was 1010 Ω cm2 after six months. This high corrosion resistance was due to the appropriate combination of condensation degree and wettability. Coatings with longer alkyl chains (hexyl, octyl, and dodecyl) showed poor corrosion resistance due to lower heterocondensation and a larger nonpolar effect that resulted in non-homogenous mixing, which could not produce dense and protective coatings.

Progress in Organic Coatings published new progress about Anticorrosive coating materials. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Product Details of C16H30O2.

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

Khidr, T. T. published the artcilePreparation and evaluation of n-alkyl methylacrylatemethylacrylate-vinyl acetate-methacrylic acid terpolymers as pour point depressant for fuel, Name: Dodecyl 2-methylacrylate, the main research area is alkyl methylacrylate vinyl acetate terpolymer pour point depressant fuel.

A variety of techniques have been employed in order to reduce problems caused by the crystallization of paraffin during the production Four different alkyl chain length of n-alkyl methacrylate-vinyl acetate-methacrylic acid terpolymers were prepared and characterized by the IR spectrometer, and the mol. weight of the prepared additives was determined by using gel permeation chromatog. anal. The performance of the prepared terpolymers as pour point depressants additives for fuel oil. The efficiency of the prepared compounds on pour point depressants for fuel oil increases by increasing the concentration of these additives and the alkyl chain length of n-alkyl methacrylate. The X- ray diffractometer patterns of wax in the absence and presence of investigated additives were studied. Comparison of morphologies and structures of waxy crystals in fuel oil beneficiated with and without a pour point depressant was made by micro photog. studies which show the modification in wax morphol. due to the additive.

Petroleum & Coal published new progress about Crystallization. 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

Iborra, Agustin published the artcileSynthesis of lauryl methacrylate and poly(ethylene glycol) methyl ether methacrylate copolymers with tunable microstructure and emulsifying properties, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is lauryl methacrylate polyethylene glycol methyl ether copolymer.

In this work we study the synthesis and properties of copolymers constituted of lauryl methacrylate and poly(ethylene glycol) Me ether methacrylate monomers, prepared by atom transfer radical copolymerization in the entire composition range (with low and high monomer conversion). We propose a description of the copolymer microstructure, and evaluate the composition drift effect in the thermal and solution properties of the obtained copolymers. NMR was used to determine the chem. composition of the copolymers, while differential scanning calorimetry and themogravimetric anal. was employed to understand the thermal chracteristics. Rheol. studies were conducted to obtain the viscosity and viscoelastic properties that were correlated with thermal transitions at different temperatures Finally, dynamic light scattering (DLS) and surface tension measurements were used to evaluate the copolymer solution properties. The incorporation of an oil phase in the self-assembled aggregates was evaluated by DLS and characterized by at. force microscopy, diffusion-ordered spectroscopy NMR and nuclear Overhauser effect NMR spectroscopy. Our results suggest a longer sequence of LMA units in the copolymer chain and a drift effect in the case of high monomer conversions. A clear dependence on copolymer composition and microstructure to disperse an oil phase in water was observed We believe that these results bring valuable knowledge that advances the field of macrosurfactants as well as their potential applications in oil recovery and other industrial processes.

European Polymer Journal published new progress about Aggregates. 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

Su, Esra published the artcileSolvent-Free UV Polymerization of n-Octadecyl Acrylate in Butyl Rubber: A Simple Way to Produce Tough and Smart Polymeric Materials at Ambient Temperature, Application of Dodecyl 2-methylacrylate, the main research area is solver free photopolymerization octadecyl acrylate butyl rubber smart material; butyl rubber; interconnected IPNs; n-octadecyl acrylate; self-healing; shape memory.

One of the most fascinating challenges in recent years has been to produce mech. robust and tough polymers with smart functions such as self-healing and shape-memory behavior. Here, we report a simple and versatile strategy for the preparation of a highly tough and highly stretchable interconnected interpenetrating polymer network (c-IPN) based on butyl rubber (IIR) and poly(n-octadecyl acrylate) (PC18A) with thermally induced healing and shape-memory functions. Solvent-free UV polymerization of n-octadecyl acrylate (C18A) at 30 ± 2°C in the presence of IIR leads to IIR/PC18A c-IPNs with sea-island or co-continuous morphologies depending on their IIR contents. The lamellar crystals with a melting temperature Tm of 51-52°C formed by side-by-side packed octadecyl (C18) side chains are responsible for more than 99% of effective cross-links in c-IPNs, the rest being hydrophobic associations and chem. cross-links. The c-IPNs exhibit varying stiffness (9-34 MPa), stretchability (72-740%), and a significantly higher toughness (1.9-12 MJ·m-3) than their components, which can be tuned by changing the IIR/PC18A weight ratio. The properties of c-IPNs could also be tuned by incorporating a second, noncrystallizable hydrophobic monomer, namely, lauryl methacrylate (C12M), in the melt mixture We show that the lamellar clusters acting as sacrificial bonds break at the yield point by dissipation of energy, while the ductile amorphous continuous phase keeps the structure together, leading to the toughness improvement of c-IPNs. They exhibit a two-step healing process with >90% healing efficiency with respect to the modulus and a complete shape-recovery ratio induced by heating above Tm of alkyl crystals. The temperature-induced healing occurs via a quick step where C18 bridges form between the damaged surfaces followed by a slow step controlled by the interdiffusion of C18A segments in the bulk. We also show that the strategy developed here is suitable for a variety of rubbers and n-alkyl (meth)acrylates of various side-chain lengths.

ACS Applied Materials & Interfaces published new progress about Crystal structure types, layered. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Application of Dodecyl 2-methylacrylate.

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

Guan, Lin published the artcileHighly transparent and stretchable hydrogels with rapidly responsive photochromic performance for UV-irradiated optical display devices, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is hydrogel photochromic optical display flexible acrylic.

Photochromic hydrogels have attracted considerable attention owing to their potential application in optical devices. However, the weak mech. properties severely limited their applications. Here, a novel photochromic hydrogel with high transparency, high stretchability and rapid photochromic responsiveness has been successfully designed and prepared by introducing a redox photochromic material (Mo) into the hybrid hydrogel. The photochromic hydrogel with rapid photochromic response achieved discoloration process within only 3 s and the fading process could be easily performed under the air environment. Moreover, the ability to rewrite and erase optical information have been implemented on the photochromic hydrogels. Therefore, this strategy of photochromic hydrogel would contribute to design a new generation of optical display devices.

Reactive & Functional Polymers published new progress about Flexible displays. 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

Gu, Wen-Ting published the artcileNon-targeted metabolomic analysis of variation of volatile fractions of ginseng from different habitats by HS-SPME-GC-MS coupled with chemometrics, SDS of cas: 41114-00-5, the main research area is Panax metabolomic volatile compound chemometrics solid phase microextraction.

Cultivated ginseng (CG), transplanted ginseng (TG) and mountain cultivated ginseng (MCG) classified by the habitat type all belong to Panax ginseng and were reported to have similar types of secondary metabolites. Nonetheless, owing to the distinctly diverse habitats in which these ginseng types grow, their pharmacol. effects differ. In the present study, an emerging anal. approach involving headspace solid-phase microextraction-gas chromatog.-mass spectrometry (HS-SPME-GC-MS) was established to effectively distinguish among CG, TG and MCG. First, the volatile components were analyzed and identified by using the NIST library combined with measured retention indexes (Kovats′, RI), and a total of 78 volatile components were finally characterized, which included terpenes, alcs., esters, aldehydes and alkynols. Furthermore, multivariate statistical approaches, principal component anal. (PCA) and orthogonal partial least-squares discrimination anal. (OPLS-DA) were subsequently utilized to screen for compounds of significance. Under optimized HS-SPME-GC-MS conditions, 12, 16, and 16 differential markers were screened in the CG-TG, CG-MCG and TG-MCG groups, resp. Our study suggested that HS-SPME-GC-MS anal. combined with metabolomic anal. methods and chemometric techniques can be applied as potent tools to identify chem. marker candidates to distinguish CG, TG and MCG.

Analytical Methods published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), PUR (Purification or Recovery), THU (Therapeutic Use), BIOL (Biological Study), PREP (Preparation), USES (Uses). 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, SDS of cas: 41114-00-5.

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

Liu, Shaohui published the artcileEffect of Decarboxylation on the Photoinitiation Behavior of Nitrocarbazole-Based Oxime Esters, Recommanded Product: Trimethylolpropane triacrylate, the publication is Macromolecules (Washington, DC, United States) (2022), 55(7), 2475-2485, database is CAplus.

A series of 50 oxime esters bearing various substituents were designed and synthesized as photoinitiators (48 of them were never synthesized before and only B1 and B10 were reported). Good light absorption properties in the visible range were observed for these oxime esters. Some structures exhibited better photoinitiation abilities than diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO) upon exposure to a LED@405 nm. Interestingly, PIs with Me substituent on the oxime ester group have better photoinitiation performance than the others. Substituent effects were investigated through MOs calculations, the detection of CO₂, and the investigation of the generated free radicals. The results demonstrate that the substituents on the oxime ester group exert major effects on the photoinitiation ability via the decarboxylation reaction. In addition, a chem. mechanism was proposed. 3D printed objects were successfully obtained by using the most reactive oxime ester as photoinitiator, and their thermal initiation behaviors of several oxime esters were also studied (dual thermal/photochem. initiator behavior).

Macromolecules (Washington, DC, United States) published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Recommanded Product: Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics