Citation: Xian-jing Gong, De-an Shi, Ying-kui Yang, Tao Jiang, Yan-feng Meng, RobertK.Y. Li, Shi-chun Jiang. Confined Crystallization Behaviors of Cross-linked Comb-like Copolymers[J]. Chinese Journal of Polymer Science, ;2016, 34(8): 1039-1046. doi: 10.1007/s10118-016-1815-3 shu

Confined Crystallization Behaviors of Cross-linked Comb-like Copolymers

a.
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
b.
Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Collaborative Innovation Center for Advanced Origanic Chemical Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, China
c.
School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
d.
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China

Corresponding author: De-an Shi, deanshi2012@yahoo.com Shi-chun Jiang, scjiang@tju.edu.cn
Received Date: 16 February 2016
Revised Date: 10 March 2016
Accepted Date: 10 March 2016

Fund Project: This work was financially supported by the National Natural Science Foundation of China 51573131This work was financially supported by the National Natural Science Foundation of China 51173130This work was financially supported by the National Natural Science Foundation of China 21374077

Cross-linked PEG-based copolymers were obtained via synthesis of polyethylene glycol (PEG) and methoxy polyethylene glycol (MPEG) by the bridging and/or cross-linking agent of 2, 4-tolylene diisocyanate (TDI) and/or hexamethylene-1, 6-diisocyanate homopolymer (HDI trimer). The effects on the crystallization behaviors of the samples could be found with the changes in molecular weight of MC-PEG and molecular weight of SC-PEG in certain cross-linked density. It is revealed that the samples appear not to crystallize when the molecular weight of MC-PEG and SC-PEG are 1000 g/mol or less than that. The samples begin to crystallize when the molecular weight of either MC-PEG or SC-PEG reaches 2000 g/mol. The crystallinity of crystallized MC-PEG decreases with the increasing molecular weight of uncrystallized SC-PEG and the crystallinity of crystallized SC-PEG declines with the rise of molecular weight of uncrystallizable MC-PEG. The chains of SC-PEG (M_n=2000 g/mol) can fold and align easilier than those of MC-PEG (M_n=2000 g/mol), when the content of PEG is the same.
- PEG-based copolymers,
- Cross-linking,
- Comb-like,
- Confined crystallization behavior
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