Citation: Wei Ning, Wen-xiang Zhu, Bao-qing Zhang, Chun-cheng Li, Chen-yang Liu, Du-jin Wang. EFFECT OF CHEMICAL STRUCTURE OF POLYCARBONATES ON ENTANGLEMENT SPACING[J]. Chinese Journal of Polymer Science, ;2012, 30(3): 343-349. doi: 10.1007/s10118-012-1144-0 shu

EFFECT OF CHEMICAL STRUCTURE OF POLYCARBONATES ON ENTANGLEMENT SPACING

Received Date: 22 November 2011
Revised Date: 15 December 2011

Fund Project: This work was financially supported by National Natural Science Foundation of China (No. 20874109) and National High Technology Research and Development Program of China (No. 2009AA033601) and the Chinese Academy of Sciences.

The master curves of a series of aliphatic polycarbonates (APCs) with different lengths of methylene segments in the repeat unit were obtained by dynamic rheological measurements. The plateau modulus and entanglement molecular weight were determined and cross-checked by different methods. Though having distinct difference in chemical structure of repeat units, both APCs and bisphenol-A polycarbonates have the similar entanglement weight and entanglement spacing. On the other side, the plateau modulus decreases with increasing the length of the side group of aliphatic polycarbonates with different side-chain lengths in the literature. The packing length model can explain the relationship between chain structure and entanglements.
- Aliphatic polycarbonates
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