权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Order and disorder in Polymer Systems : Structure and Dynamics

聚合物系统中的有序和无序：结构和动力学

基本信息

批准号：
05303009
负责人：
TERAMOTO Akio
金额：
$ 2.11万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05303009/
关键词：
Polymer Conformation Dynamics Phase separation Gel Interface Block copolymer Branched polymer 粘弾性

项目摘要

1.Dkynamic and static properties of linear polymers in the solution and bulk states.(1)Dynamic properties Dynamics of flexible polymers in concentrated systems was studied by dielectric dispersion method, which revealed some problems in the reptation model theories. For polymeric materials, mechanical responses to large deformation and local molecular motion near the glass temperature were investigated by the following methods : (a)the use of bimodal-distribution polymer samples, (b)the measurement of differential dynamic mudulus, (c)the study of the uniaxial and biaxial extension deformations, and(d)the simultaneous measurements of dynamic viscoelasticity and birefringence. The polymer motion near the glass temperature classified into two types, each of which was molecularly interpreted.(2)Static properties Thermodynamic and spatial properties of stiff-chain polymer systems were explained by molecular theories different from theories of flexible polymers. Anisotropic interaction between polymer chains in polymer blend systems was studied by infrared dichroism, and it was shown to be important for the miscibility of the blends. The screening of the intramolecular excluded volume effect was studied by computer simulation.2.Polymeric systems with current interestsOn the basis of the above results for homogeneous systems of linear polymers, the research was extended to the following systems with current interests : (a)branched polymers [star-shaped and tree-like polymers, poly(macromonomer)s], (b)chemically and physically cross-linked polymer gels, (c)macro-and micro-phase-separated polymer systems, and(d)polymers in interface. New computer simulation techniques were applied to the systems(a)and (c), new theories were developed for the systems(a)-(d), and new experimental techniques(e.g., neutron scattering and refractivity measurements)were used to study the systems(b)and(d).

1.线性聚合物在溶液和本体状态下的动态和静态性质。（1）动力学性质用介电色散方法研究了柔性聚合物在浓溶液中的动力学性质，揭示了蠕动模型理论中存在的一些问题。对于聚合物材料，通过以下方法研究了大变形和玻璃化温度附近的局部分子运动的力学响应：（a）使用双峰分布的聚合物样品，（B）微分动态模量的测量，（c）单轴和双轴拉伸变形的研究，以及（d）动态粘弹性和双折射的同时测量。聚合物在玻璃化温度附近的运动分为两种类型，每一种都从分子水平上进行了解释。（2）刚性链高分子体系的静态性质用不同于柔性高分子的分子理论解释了刚性链高分子体系的热力学和空间性质。用红外二向色性研究了聚合物共混体系中聚合物链间的各向异性相互作用，发现它对共混体系的相容性有重要影响。2.当前感兴趣的聚合物体系在线性聚合物均相体系的上述结果的基础上，将研究扩展到以下当前感兴趣的体系：（a）支化聚合物[星形和树状聚合物，聚（大分子单体）s]，（B）化学和物理交联的聚合物凝胶，（c）大分子和微相分离的聚合物体系，和（d）界面中的聚合物。新的计算机模拟技术被应用于系统（a）和（c），新的理论被开发用于系统（a）-（d），并且新的实验技术（例如，中子散射和放射性测量）用于研究系统（B）和（d）。