ROLE OF SLIDING DIFFUSION AND MOLECUAR WEIGHT OF POLYMER CHAINS IN POLYMER CRYSTALLIZATION AND LIQUIDCRYSTALLIZATION

滑动扩散和聚合物链分子量在聚合物结晶和液晶化中的作用

• 批准号: 07455386
• 负责人: HIKOSAKA Masamichi
• 金额: $ 5.12万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455386/
• 关键词: POLYMER; CRYSTALLIZATION; MOLECULAR WEIGHT; DIFFUSION; INTERFACE; 液晶化; 比熱; 吸着; 滑り拡散

nown that polymer crystallization rate strongly depends on molecular weight (M), but its mechanism has bccn remained as an ained as an important unsolved problem in polymer science. We solved the problem in this study. Our answcr is that the M dependence of the lateral growth rate (V) is mainly controlled by the chain sliding diffusion process on the inrerface between the melt and the crystals. The answer was directly obtained from the observed result that the M dependence of V strongly depends on the crystal form, order or disorder, which can not be cxplaincd by the conventional proposal that it is controlled by self diffusion of chain molecules within the melt.

聚合物结晶速率与分子量密切相关，但其机理一直是聚合物科学中一个未解决的重要问题。我们在这项研究中解决了这个问题。我们的回答是，横向生长速率（V）对M的依赖性主要是由熔体与晶体界面上的链滑动扩散过程控制的。从观察结果中直接得出了V对M的依赖性强烈地依赖于晶体的形式，即有序或无序，这不能用传统的认为它是由链分子在熔体中的自扩散控制的观点来解释。

项目成果

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