Citation: Guang-peng Wu, Shi-dong Jiang, Xiao-bing Lu, Wei-min Ren, Shou-ke Yan. STEREOREGULAR POLY(CYCLOHEXENE CARBONATE)S: UNIQUE CRYSTALLIZATION BEHAVIOR[J]. Chinese Journal of Polymer Science, ;2012, 30(4): 487-492. doi: 10.1007/s10118-012-1171-x shu

STEREOREGULAR POLY(CYCLOHEXENE CARBONATE)S: UNIQUE CRYSTALLIZATION BEHAVIOR

Received Date: 1 February 2012
Revised Date: 10 April 2012

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 21134002 and 21104003) and National Basic Research Program of China (973 Program: 2009CB825300).

An example of crystalline CO2-based polymer from the asymmetric alternating copolymerization of CO2 and cyclohexene oxide is reported. Isotacticity of poly(cyclohexene carbonate) (PCHC) has the critical influence on the crystallinity, and only copolymers with a isotacticity of more than 90% are crystallizable. The stereoregular PCHC is a typical semi-crystalline thermoplastic, and possesses a high melting point (Tm) of 215-230癈 and a decomposition temperature of ca. 310癈. The spherulitic morphology of (R)-PCHC grows in a clockwise spiral from a center, and that of (S)-PCHC is a counterclockwise spiral, while the stereocomplex of (S)-PCHC/(R)-PCHC (1/1 mass ratio) presents lath-like dendritic crystal. The novel crystalline CO2-based polycarbonate represents a rare example of optically active polymers with unique crystallization behavior. Our findings reflect the critical influence of stereoregularity on the crystallization for this kind of polymeric materials, and may lead to developments of thermal-resistance CO2 copolymers for application in engineering thermoplastics.
- Carbon dioxide
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