EFFECTS OF GELATION RETARDATION ON THERMAL RESPONSE BEHAVIOR OF PNIAPM GELS:A METHOD TO IMPROVE THEIR DESWELLING KINETICS

Qun-feng Liu Si-dong Li College of Science; Guangdong Ocean University; Zhanjiang 524088; China Ping Zhang Yan-xun Lan Man-geng Lu~ Guangzhou Institute of Chemistry; Chinese Academy of Sciences; P.O.Box 1122; Guangzhou 510650; China

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EFFECTS OF GELATION RETARDATION ON THERMAL RESPONSE BEHAVIOR OF PNIAPM GELS:A METHOD TO IMPROVE THEIR DESWELLING KINETICS

Updated：2021-06-21

- EFFECTS OF GELATION RETARDATION ON THERMAL RESPONSE BEHAVIOR OF PNIAPM GELS:A METHOD TO IMPROVE THEIR DESWELLING KINETICS
- EFFECTS OF GELATION RETARDATION ON THERMAL RESPONSE BEHAVIOR OF PNIAPM GELS:A METHOD TO IMPROVE THEIR DESWELLING KINETICS
- 高分子科学（英文版） 2007年第6期页码：635-640
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Qun-feng Liu Si-dong Li College of Science, Guangdong Ocean University, Zhanjiang 524088, 等. EFFECTS OF GELATION RETARDATION ON THERMAL RESPONSE BEHAVIOR OF PNIAPM GELS:A METHOD TO IMPROVE THEIR DESWELLING KINETICS[J]. 高分子科学（英文版）, 2007,(6):635-640.

Qun-feng Liu Si-dong Li College of Science, Guangdong Ocean University, Zhanjiang 524088, et al. EFFECTS OF GELATION RETARDATION ON THERMAL RESPONSE BEHAVIOR OF PNIAPM GELS:A METHOD TO IMPROVE THEIR DESWELLING KINETICS[J]. 2007,(6):635-640.
Qun-feng Liu Si-dong Li College of Science, Guangdong Ocean University, Zhanjiang 524088, 等. EFFECTS OF GELATION RETARDATION ON THERMAL RESPONSE BEHAVIOR OF PNIAPM GELS:A METHOD TO IMPROVE THEIR DESWELLING KINETICS[J]. 高分子科学（英文版）, 2007,(6):635-640. DOI：

Qun-feng Liu Si-dong Li College of Science, Guangdong Ocean University, Zhanjiang 524088, et al. EFFECTS OF GELATION RETARDATION ON THERMAL RESPONSE BEHAVIOR OF PNIAPM GELS:A METHOD TO IMPROVE THEIR DESWELLING KINETICS[J]. 2007,(6):635-640. DOI：

摘要

<正>P（N-isopropylacrylamide）（PNIPAM）prepared by reversible addition fragmentation chain transfer（RAFT） polymerization exhibited gelation retardation.The intermediate before gelation was characterized and indicated the presence of branched or hyperbranched chains.The swelling behavior was investigated,and the gel by RAFT polymerization（RAFT gel）showed accelerated shrinking kinetics and higher swelling ratio comparing with conventional gels（CG）.The study was extended to gels prepared by using 2-hydroxy-1-ethanethiol as chain transfer agent and by using low concentration solutions. The two systems also exhibited retardation effects and improved deswelling kinetics.The different swelling behaviors of these gels and CG could be attributed to the presence of dangling chains caused by gelation retardation.

Abstract

P（N-isopropylacrylamide）（PNIPAM）prepared by reversible addition fragmentation chain transfer（RAFT） polymerization exhibited gelation retardation.The intermediate before gelation was characterized and indicated the presence of branched or hyperbranched chains.The swelling behavior was investigated,and the gel by RAFT polymerization（RAFT gel）showed accelerated shrinking kinetics and higher swelling ratio comparing with conventional gels（CG）.The study was extended to gels prepared by using 2-hydroxy-1-ethanethiol as chain transfer agent and by using low concentration solutions. The two systems also exhibited retardation effects and improved deswelling kinetics.The different swelling behaviors of these gels and CG could be attributed to the presence of dangling chains caused by gelation retardation.

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