两亲性嵌段无规共聚物稳定剂:扩展到其他单体类型

IF 4.1 2区 化学 Q2 POLYMER SCIENCE
Arthur Werner, Connor A. Sanders, Sandra Smeltzer, Sean R. George, Andreas Gernandt, Bernd Reck, Michael F. Cunningham
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引用次数: 0

摘要

利用氮氧化物介导聚合(NMP)合成了含丙烯酸酯的嵌段无规共聚物(BRCs),以形成用于制备聚合物乳胶的宏观稳定剂。这些嵌段共聚物和无规共聚物的杂化物传统上由聚苯乙烯疏水嵌段与苯乙烯和丙烯酸的亲水性无规嵌段耦合组成。与传统嵌段共聚物相比,它们的水相分散体表现出独特的行为,包括在乳液聚合中具有独特的成核机制。然而,以往的工作都只使用苯乙烯作为疏水单体,并且只进行了苯乙烯乳液聚合。为了探索BRC在苯乙烯类以外的单体聚合(如丙烯酸酯、甲基丙烯酸酯)中的多功能性,研究人员引入了甲基丙烯酸甲酯(MMA)和丙烯酸正丁酯(n-BuA)作为疏水单体,探索了BRC库。用由一个或多个单体组成的块体,所有BRCs都成功地以高浓度(100 g.L-1)分散在水中,与先前报道的苯乙烯基BRCs具有相似的行为。还进行了苯乙烯或丙烯酸酯乳液的半间歇乳液聚合。发现由正丁腈橡胶和苯乙烯共聚物组成的疏水嵌段是最感兴趣的,在聚合的乳液范围内显示出有希望的稳定性
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Amphiphilic Block-Random Copolymer Stabilisers: Extension to Other Monomer Types
Block-Random Copolymers (BRCs) incorporating acrylics were synthesised using nitroxide-mediated polymerisation (NMP) to form macro-stabilisers for the preparation ofpolymer latexes. These hybrids of block copolymers and random copolymers are traditionally composed of a polystyrene hydrophobic block coupled with a hydrophilic random block of styrene and acrylic acid. Their aqueous dispersions exhibit unique behaviour compared to conventional block copolymers, including being responsible for a unique nucleation mechanism in emulsion polymerisation. However, all previous work has only used styrene as the hydrophobic monomer, and only styrene emulsion polymerizations have been conducted. To explore the versatility of BRCs for the polymerisation of monomers other than styrenics (e.g. acrylates, methacrylates), the BRC library was explored with the introduction of methyl methacrylate (MMA) and n-butyl acrylate (n-BuA) units as the hydrophobic monomers. With blocks composed of one or multiple monomers, all the BRCs were successfully dispersed in water at high concentrations (>100 g.L-1), with similar behaviour compared to previously reported for styrene-based BRCs. Semi-batch emulsion polymerisation of styrene or acrylates latexes was also performed. A hydrophobic block consisting of a n-BuA and styrene copolymer was found to be of the most interest, showing promising stability over the range of latexes polymerised
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来源期刊
Polymer Chemistry
Polymer Chemistry POLYMER SCIENCE-
CiteScore
8.60
自引率
8.70%
发文量
535
审稿时长
1.7 months
期刊介绍: Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.
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