A Study on Properties of PEG Bent Double Chain Stranded Polypseudorotaxanes with γ-Cyclodextrins

doi:10.6023/A12120998

Acta Chimica Sinica ›› 2013, Vol. 71 ›› Issue (03): 347-350.DOI: 10.6023/A12120998 Previous Articles Next Articles

Communications

γ-环糊精包结折叠双链PEG聚准轮烷材料的性能研究

高鹏, 王培境, 耿雪, 叶霖, 张爱英, 冯增国

北京理工大学材料学院北京 100081

投稿日期:2012-12-03 发布日期:2013-01-31
通讯作者: 冯增国 E-mail:sainfeng@bit.edu.cn
基金资助:
项目受国家自然科学基金(No.20974015)和中国教育部博士点基金项目(No.20091101110029)资助.

A Study on Properties of PEG Bent Double Chain Stranded Polypseudorotaxanes with γ-Cyclodextrins

Gao Peng, Wang Peijing, Geng Xue, Ye Lin, Zhang Aiying, Feng Zengguo

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081

Received:2012-12-03 Published:2013-01-31
Supported by:
Project supported by the National Natural Science Foundation of China (No. 20974015) and the Doctoral Program Foundation of Ministry of Education of China (No. 20091101110029).

1. A Study on Properties of PEG Bent Double Chain Stranded Polypseudorotaxanes with γ-Cyclodextrins.PDF(225KB)

Abstract

Recently a variety of cyclodextrin (CD)-based polypseudorotaxanes (PPRs) and polyrotaxanes (PRs) have attracted trememdous attention as building blocks for hierarchical nanostructured materials. γ-CDs are known to include two chains of poly(ethylene glycol) (PEG) into their cavity, either bent double chains or two parallel chains to create PPRs or PRs. A distal 2-bromoisobutyryl end-capped PEG (M_n=4000) was found to self-assemble with γ-CDs to form PEG bent double chain stranded PPRs which are stable enough to further initiate the bulk atom transfer radical polymerization (ATRP) of n-butyl methacrylate (BMA) to give rise to the same conformational PPR-based block copolymers. As attached PBMA possesses good processing and mechanical properties, the resulting copolymers were soluble in chloroform to be cast into films. Due to added γ-CDs in the conformation of PEG bent double chain remaining the characteristic channel-type crystal structure, the higher mechanical strength was noted in the copolymers, while the elongation ratio was remarkedly got down. The static contact angle was substantially decreased as compared to the homopolymer PBMA, but was slightly enhanced with regard to the triblock copolymer PBMA-PEG-PBMA. Furthermore, they were electrospun into uniform non-woven fibers in a solution of dichloromethane, and morphology of fibers was affected by the polymer solution concentration.

Key words: γ-cyclodextrin, double chain stranded, ATRP, mechanical property, electrospinning

Cite this article

Gao Peng, Wang Peijing, Geng Xue, Ye Lin, Zhang Aiying, Feng Zengguo. A Study on Properties of PEG Bent Double Chain Stranded Polypseudorotaxanes with γ-Cyclodextrins[J]. Acta Chimica Sinica, 2013, 71(03): 347-350.

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γ-环糊精包结折叠双链PEG聚准轮烷材料的性能研究

A Study on Properties of PEG Bent Double Chain Stranded Polypseudorotaxanes with γ-Cyclodextrins

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