Tunable, Concentration-Independent, Sharp, Hysteresis-Free UCST Phase Transition from Poly(N-Acryloyl Glycinamide-Acrylonitrile) System
Tunable, Concentration-Independent, Sharp, Hysteresis-Free UCST Phase Transition from Poly(N-Acryloyl Glycinamide-Acrylonitrile) System
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DOI：
10.1002/pola.28374
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发表时间：
2017-01-01
影响因子：
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通讯作者：
Agarwal, Seema
中科院分区：
文献类型：
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作者：
Kaefer, Florian;Lerch, Arne;Agarwal, Seema
采用可逆加成断裂转移聚合法合成了聚(N-丙烯酰甘酰胺-共-丙烯腈)(聚(NAGA-AN))共聚物。与聚（NAGA）相比，聚（NAGA-AN）的热响应行为在水中表现出狭窄的冷却/加热滞后，并具有可调节的浊点，具体取决于聚合物中丙烯腈的含量。此外，我们表明溶液浓度对电解质溶液中的浊点和稳定的相变行为没有显着影响，这可能是通过由于嵌段/接枝共聚物结构而形成稳定的胶束状结构来控制的。这与聚（NAGA）形成鲜明对比，聚（NAGA）在水溶液中显示出强烈的浓度依赖性浊点，并具有广泛的冷却/加热滞后。 (C) 2016 年 Wiley 期刊公司。
Poly(N-acryloylglycinamide-co-acrylonitrile)(poly(NAGA-AN)) copolymers were synthesized using reversible-addition-fragmentation transfer polymerization. In contrast to poly(NAGA) the thermoresponsive behavior of poly(NAGA-AN) shows a narrow cooling/heating hysteresis in water with a tunable cloud point, depending on the acrylonitrile amount in polymer. Furthermore, we showed that there is no significant effect of the solution concentration on the cloud point and stable phase transition behavior in electrolyte solutions, which is presumable controlled by forming stable micellar like structures as a result of the block/graft-copolymer structure. This is in contrast to poly(NAGA) which shows a strong concentration dependent cloud point in aqueous solution with a broad cooling/heating hysteresis. (C) 2016 Wiley Periodicals, Inc.