期刊文献+

Confined Crystallization Behaviors of Cross-linked Comb-like Copolymers

Confined Crystallization Behaviors of Cross-linked Comb-like Copolymers
原文传递
导出
摘要 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-l,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. 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-l,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.
出处 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2016年第8期1039-1046,共8页 高分子科学(英文版)
基金 financially supported by the National Natural Science Foundation of China(Nos.51173130,21374077 and 51573131)
关键词 PEG-based copolymers Cross-linking Comb-like Confined crystallization behavior. PEG-based copolymers Cross-linking Comb-like Confined crystallization behavior.
  • 相关文献

参考文献25

  • 1Fullerton-Shirey, S.K. and Maranas, J.K., Macromolecules, 2009, 42(6): 2142.
  • 2Cheng, S., Smith, D.M. and Li, C.Y., Macromolecules, 2014, 47(12): 3978.
  • 3Kalakkunnath, S., Kalika, D.S., Lin, H. and Freeman, B.D., Macromolecules, 2005, 38(23): 9679.
  • 4Lin, H. and Freeman, B.D., J. Mol. Struct., 2005, 739(1-3): 57.
  • 5Khurana, R., Schaefer, J.L. and Archer, L.A., J. Am. Chem. Soc., 2014, 136(20): 7395.
  • 6Mihaylova, M.D., Krestev, V.P., Kresteva, M.N., Amzil, A. and Berlinova, I.V., Eur. Polym. J., 2001, 37(2): 233.
  • 7Qiao, C.D., Jiang, S.C., Dong, D.W., Ji, X.L., An, L.J. and Jiang, B.Z., Macromol. Rapid Commun., 2004, 25(5): 659.
  • 8Inomata, K., Nakanishi, E., Sakane, Y., Koike, M. and Nose, T., J. Polym. Sci., Part B: Polym. Phys., 2005, 43(1): 79.
  • 9Mark, P.R., Murthy, N.S., Weigand, S., Breitenkamp, K., Kade, M. and Emrick, T., Polymer, 2008, 49(13-14): 3116.
  • 10Maccallum, J.R., Smith, M.J. and Vincent, C.A., Solid State Ionics, 1984, 11(4): 307.

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部