Crystallization mechanism of polymer

聚合物的结晶机理

• 批准号: 12127203
• 负责人: KANAYA Toshiji
• 金额: $ 11.39万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12127203/
• 关键词: polymer crystallization; induction period; mesomorphic state; shear flow; oriented glass; shishi-kebab structure; MD simulation; Depletion effect; 結晶化; 誘導期; スピノーダル分解; 静置場; 流動場; 排除体積効果; 相分離

We have studied formation mechanism of polymer crystallization, focusing our attention on induction period of crystallization before nucleation. This work can be classified into the following four subjects.(1)Structural formation in preparatory process of polymer crystallization : We have directly observed transformation process from molten state to mesomorphic state of isotactic polypropylene(iPP) using super temperature jump apparatus developed by our laboratory.(2)Polymer crystallization under shear flow : We have evaluated structure formation process of so-called shishi-kebab structure in crystallization of iPP under shear flow, using time resolved depolarized light scattering, small angel X-ray scattering, small angel neutron scattering and wide angel neutron scattering techniques.(3)Crystallization mechanism of polymers from oriented glass : In order clarify the mechanism of formation of so-called long period, we have studied crystallization process of oriented poly (ethylene terephthalate) using a time resolved wide angel scattering technique(4)We investigated effects of phase separation on polymer crystallization in mixture of rod-like polymers and flexible polymers and clarified depletion effects in polymer crystallization.

研究了聚合物结晶的形成机理，重点研究了成核前的结晶诱导期。本工作可分为以下四个方面。(1)聚合物结晶准备过程中的结构形成：我们利用实验室研制的超温跳变装置，直接观察到了等规聚丙烯(IPP)从熔融状态到介晶态的转变过程。(2)剪切流动下的聚合物结晶：我们利用时间分辨去偏振光散射、小角X射线散射、小角中子散射和广角中子散射技术，研究了剪切流作用下iPP结晶过程中所谓的石灰串结构的结构形成过程。(3)取向玻璃聚合物的结晶机理：为了阐明所谓长周期的形成机理，我们采用了时间分辨的去偏振光散射、小角X射线散射、小角中子散射和广角中子散射技术。我们用时间分辨广角散射技术研究了取向聚对苯二甲酸乙二酯的结晶过程。(4)研究了棒状聚合物和柔性聚合物混合体系中相分离对聚合物结晶的影响，阐明了聚合物结晶过程中的耗尽效应。

项目成果

Go Matsuba: "Conformational Change and Orientation on Fluctuations Prior to the Crystallization of Syndiotatic Polystyrene"Macromolecules. 32・26. 8932-8937 (2000)

松叶刚：“间规聚苯乙烯结晶前的构象变化和波动方向”32・26（2000）。

G.Matsuba, K.Kaji, T.Kanaya, K.Nishida: "Detailed Analysis of the Induction Period of Polymer Crystallization by Depolarized light Scattering"Phys.Rev. E65. 61801-61807 (2002)

G.Matsuba、K.Kaji、T.Kanaya、K.Nishida：“通过去偏振光散射详细分析聚合物结晶的诱导期”Phys.Rev。

K.Kaji, K.Nishida, G.Matsuba, T.Kanaya, M.Imai: "Details of Structure Formation During the Induction Period of Spinodal Type Polymer Crystallization"J.Macromol.Sci.. (In press).

K.Kaji、K.Nishida、G.Matsuba、T.Kanaya、M.Imai：“旋节线型聚合物结晶诱导期结构形成的详细信息”J.Macromol.Sci.（印刷中）。

K.Kaji, K.Nishida, G.Matsuba, T.Kanaya, M.Imai: "Details of Structure Formation During the Induction Period of Spinodal Type Polymer Crystallization"J.Macromol.Sci. B42. 709-715 (2003)

K.Kaji、K.Nishida、G.Matsuba、T.Kanaya、M.Imai：“旋节线型聚合物结晶诱导期间的结构形成细节”J.Macromol.Sci。

G.Matsuba, K.Kaji, T.Kanaya, K.Nishida: "Detailed Analysis of the Induction Period of Polymer Crystallization by Depolarized light Scattering"Phys. Rev.. E65. 61801-61807 (2002)

G.Matsuba、K.Kaji、T.Kanaya、K.Nishida：“通过去偏光散射对聚合物结晶诱导期的详细分析”Phys。