Studies on Isothermal Crystallization Kinetics of iPS-b-iPP Block Copolymer

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (1): 139.

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Studies on Isothermal Crystallization Kinetics of iPS-b-iPP Block Copolymer

XU Guang-Xue, LIN Shang-An

Institute of Polymer Science, Zhongshan University, Guangzhou, 510275

Received:1994-04-21 Revised:1994-08-01 Online:1995-01-24 Published:1995-01-24

Abstract

Abstract: The isothermal crystallization Kinetics of styrene/propylene block copolymer(iPSb-iPP)has been investigated by DSC. The results indicated that the kinetics of isothermal crystallization for all of samples was fitted for the Avrami,equation quite well within selected crystallization temperature(127-132℃),and that the crystallization temperature, crystallization rate and crystal growing mechanism were affected by the composition ratio of iPS-biPP. With the increase of the content of iPSblock in iPS-b-iPP copolymers crystallization rate(G)and Avrami exponent(n) were significantly reduced.In addition, a discussion about the relationship between the growing mechanism of crystals and the composition ratio of iPSb-iPPwas made based on the Avrami exponents and TEM.

Key words: Styrene-propylene copolymer, DSC, Isothermal crystallization kinetics

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XU Guang-Xue, LIN Shang-An. Studies on Isothermal Crystallization Kinetics of iPS-b-iPP Block Copolymer[J]. Chem. J. Chinese Universities, 1995, 16(1): 139.

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Studies on Isothermal Crystallization Kinetics of iPS-b-iPP Block Copolymer

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