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Citation: LIU Ye-Qiu, XU Jia-Rui. Effects of Copolymer Composition on the Crystallization Behavior of Polypropylene-g-Polyurethane[J]. Chinese Journal of Applied Chemistry, ;2002, 19(8): 719-722. shu

Effects of Copolymer Composition on the Crystallization Behavior of Polypropylene-g-Polyurethane

LIU Ye-Qiu ,
XU Jia-Rui ^,

1.
Key Laboratory for Polymeric Composite and Functional Materials, Ministry of Education, Institute of Material Science, Zhongshan University, Guangzhou 510275

Corresponding author: XU Jia-Rui,
Received Date: 28 November 2001
Available Online: 4 May 2002
Fund Project: 国家杰出青年科学基金(59625307) (59625307)教育部博士点专项科研基金(20010558002) (20010558002)广东省自然科学基金(990271)资助项目 (990271)

The effects of polyurethane(PU) branches on the crystallization behavior of polypropylene grafted with polyurethane(PP-g-PU) have been studied by DSC and WAXD techniques. The results showed that the presence of PU branches could lower the melting temperature and increase the crystallization temperature of the copolymers. The apparent crystallization rate of PP-g-PU increased with increase of the PU content in the samples. The growth direction of the crystallites was found to be varied with the content of PU in the copolymers.
- polypropylene,
- polyurethane,
- graft copolymer,
- crystallization behavior
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