文章摘要
基于酶引发的温敏聚合物的合成与性能
Synthesis and properties of temperature-sensitive polymers based on enzyme initiation
投稿时间:2020-01-15  修订日期:2020-03-05
DOI:
中文关键词: 温敏  辣根过氧化物酶  低临界溶解温度  聚合物  自由基聚合  功能材料
英文关键词: thermo-sensitive  horse radish peroxidase  low critical solution temperature  polymer  free radical polymerization  functional materials
基金项目:
作者单位E-mail
杨云仙 江南大学 1545594601@qq.com 
余圆圆 江南大学 jnyyy@jiangnan.edu.cn 
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中文摘要:
      以2-甲基-2-丙烯酸-2-(2-甲氧基乙氧基)乙酯(MEO2MA)和低聚乙二醇甲醚甲基丙烯酸酯(OEGMA500)为单体,利用辣根过氧化物酶(HRP)/乙酰丙酮(ACAC)/H2O2三元催化体系引发自由基聚合,合成了温敏无规共聚物P(MEO2MA-co-OEGMA500)。通过GPC、1HNMR、FTIR、DSC等对合成聚合物的数均分子量、分子量分布、结构及热性能进行了表征。通过测定聚合物溶液在不同温度下的透光率和粒径对聚合物的温敏性能进行了表征。制备了n(MEO2MA)∶n(OEGMA500)分别为100:0、95:5、93:7、90:5、85:15的温敏聚合物,结果表明,随着单体OEGMA500投料占比的增加,合成聚合物的LCST从24 ℃增加至39 ℃,聚合物玻璃化转变温度从-11.75 ℃逐渐降低至-14.74 ℃;LCST随聚合物水溶液浓度增加而降低;升高温度,聚合物平均粒径增加,比在低温条件下聚合物平均粒径大82.5~135.6 nm。
英文摘要:
      2-(2-Methoxyethoxy) ethyl methacrylate (MEO2MA) and polyethylene glycol methyl ether methacrylate (OEGMA500) were used as monomers, the temperature-sensitive random copolymers P(MEO2MA-co-OEGMA500) were synthesized by free radical polymerization with horse radish peroxidase (HRP)/acetylacetone (ACAC)/H2O2 catalytic initiator system. The number-average molecular weight, molecular weight distribution, the structure and thermal properties of the synthesized polymers were characterized by GPC, 1HNMR, FTIR and DSC. The temperature-sensitive properties of the synthetic polymers were characterized by the determination of light transmission and particle size of polymer aqueous solution at different temperatures. Temperature-sensitive polymer with a feed molar ratio of n(MEO2MA):n(OEGMA500) of 100:0, 95:5, 93:7, 90:5, and 85:15 were synthesized. The results show that the LCST of the synthetic polymers increases from 24 ℃ to 39 ℃ and the glass-transition temperature of the synthetic polymers gradually decreases from -11.75 ℃ to -14.74 ℃ with the increase in the feed proportion of OEGMA500. The LCST decreases with increasing the concentration of polymer aqueous solution. With the increase of the temperature, the average particle size of the polymers increases and are 82.5~135.6 nm larger than that at low temperature.
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