Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (1): 172.

• Articles • Previous Articles     Next Articles

Physical Gelation and Structures of P123 in D2O Solution

TANG Jian-Kai, SUN Zhao-Yan*, AN Li-Jia   

  1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2009-05-26 Online:2010-01-10 Published:2010-01-10
  • Contact: SUN Zhao-Yan. E-mail: zysun@ciac.jl.cn
  • Supported by:

    国家自然科学基金(批准号: 20574070, 20734003, 50621302)和吉林省杰出青年科学基金(批准号: 20070113)资助.

Abstract:

1H NMR was used to study the sol-gel transition of triblock copolymer P123(PEO20PPO70PEO20, 30%) in D2O solution by analyzing the half-height width and the chemical shift of the proton signals of the P123. The changes of gel structures for P123(30%) was investigated with rheological method and synchrotron radiation(SR). With the increase of temperature, the transition of gel phases from fcc+hcps to hcp structure and finally to lamellar structure were found. Moreover, the phase separation occurred for the P123 in D2O solution at high temperature.

Key words: Chemical shift; Synchrotron radiation(SR); Hexagonal close packed spheres(hcps); D2O solution; Trasvisition of sol-gel

TrendMD: