Preparation and study of alkyl carbamylated polyrotaxanes with large   hysteresis during sol-gel phase transition

doi:10.1039/c1py00081k

CORC > 北京大学 > 化学与分子工程学院

	Preparation and study of alkyl carbamylated polyrotaxanes with large hysteresis during sol-gel phase transition
	Li, Wei ; Guo, Yanli ; He, Peng ; Yang, Rong ; Li, Xingguo ; Chen, Ye ; Liang, Dehai ; Kidowaki, Masatoshi ; Ito, Kohzo
刊名	polymer chemistry
	2011
关键词	SLIDE-RING GEL POLY(ETHYLENE GLYCOL) ALPHA-CYCLODEXTRINS SIDE-CHAINS COPOLYMER SANS SCATTERING POLYMERS NETWORK
DOI	10.1039/c1py00081k
英文摘要	Ethyl carbamylated polyrotaxane (ECPR) and propyl carbamylated polyrotaxane (PCPR) were prepared based on the reactions between ethyl/propyl isocyanate and polyrotaxane (PR) in anhydrous DMSO under an argon atmosphere. By changing the alkyl type and substitution ratio, the PR derivative with good water-solubility was obtained and its solutions showed reversible sol-gel phase transition. During the heating process, transition temperature from sol to gel decreased from 32 degrees C to 18 degrees C with increasing the solution concentration from 2.44% to 13.5%, while in the cooling process, all the gels with various concentration did not turn into sols until the temperature decreased to 1 degrees C, exhibiting large hysteresis between heating and cooling.; Polymer Science; SCI(E); 2; ARTICLE; 8; 1797-1802; 2
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/151065]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Li, Wei,Guo, Yanli,He, Peng,et al. Preparation and study of alkyl carbamylated polyrotaxanes with large hysteresis during sol-gel phase transition[J]. polymer chemistry,2011.
APA	Li, Wei.,Guo, Yanli.,He, Peng.,Yang, Rong.,Li, Xingguo.,...&Ito, Kohzo.(2011).Preparation and study of alkyl carbamylated polyrotaxanes with large hysteresis during sol-gel phase transition.polymer chemistry.
MLA	Li, Wei,et al."Preparation and study of alkyl carbamylated polyrotaxanes with large hysteresis during sol-gel phase transition".polymer chemistry (2011).