引用本文:
徐洋, 周恩乐, 余赋生, 钱保功. 稀土顺-1,4-聚丁二烯的分子量及分子缠结对结晶行为的影响[J]. 应用化学,
1987, 4(1): 48-52.
Citation: Xu Yang, Zhou Enle, Yu Fusheng, Qian Baogong. THE EFFECTS OF MOLECULAR WEIGHT AND ENTANGLEMENT OF CIS-1,4-POLYBUTADIENE ON THE CRYSTALLIZATION BEHAVIOR[J]. Chinese Journal of Applied Chemistry, 1987, 4(1): 48-52.
Citation: Xu Yang, Zhou Enle, Yu Fusheng, Qian Baogong. THE EFFECTS OF MOLECULAR WEIGHT AND ENTANGLEMENT OF CIS-1,4-POLYBUTADIENE ON THE CRYSTALLIZATION BEHAVIOR[J]. Chinese Journal of Applied Chemistry, 1987, 4(1): 48-52.
稀土顺-1,4-聚丁二烯的分子量及分子缠结对结晶行为的影响
摘要:
本工作以线膨胀、体膨胀、DSC、扭辫等方法,在较宽的分子量和结晶温度范围内研究了稀土顺-1,4-聚丁二烯(Ln-PB)的分子量与结晶速率,结晶熔点,玻璃化温度及结晶比表面能之间的关系。进一步考察了分子链缠结对结晶速率的影响,并在结晶成核理论的基础上引入链缠结的影响,导出Ln-PB的结晶动力学方程,得到了与实验符合较好的结果。
English
THE EFFECTS OF MOLECULAR WEIGHT AND ENTANGLEMENT OF CIS-1,4-POLYBUTADIENE ON THE CRYSTALLIZATION BEHAVIOR
Abstract:
In this paper, the bulk crystallization behavior of cis-1, 4-polybutadiene polymerized with rare-earth catalyst (Ln-PB) has been studied by linear dilatometry, volumetric dilatometry, DSC, TBA, and x-ray diffraction techniques. The effects of molecular weight of Ln-PB on the crystallization rate, melting point, glass temperature, and specific crystal surface free energy has been investigated in a wide range of molecular weight and crystallization temperature. It has been found that the crystallization rate increases initially with increasing the density of chain entanglement networks, through a maximum, and declines. Thereafter using secondary nucleation theory and taking into account the effect of the entanglement on the crystallization, a crystallization kinetic equation of Ln-PB which is quite adequate experimental data could be derived.
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