The structure and dynamic properties of polymers at interfaces

聚合物界面的结构和动态特性

• 批准号: 218056-2012
• 负责人: WoodAdams, Paula
• 金额: $ 2.48万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=594027
• 关键词: structure; dynamic; properties; polymers; interfaces

Interfaces, between polymers and their environment and between different constituents in a multiphase polymeric material, play a significant role in macroscopic end-use and processing behaviors such as: the crystalline content, morphology and grading; the strength of a composite material; slip under flow and production rate-limiting features such as surface fracture or die drool. While much is known about the surface and interfacial properties of polymers, there is a lack of detailed models relating the molecular structure of the polymer, its local structure, composition and dynamic properties at the interface and the macroscopic behaviors. In this work we will provide the required molecular level understanding that will drive the development of sophisticated, quantitative and realistic models. We will focus on two phenomena, surface induced crystallization of polymers and slip of polymer melts under flow, that are both manifestations of interfacial chain dynamics primarily determined by chain length, architecture and adsorption on a surface.

聚合物与其环境之间以及多相聚合物材料中的不同成分之间的界面在宏观最终用途和加工行为中起着重要作用，例如：结晶含量，形态和分级;复合材料的强度;流动下的滑动和生产速率限制特征，例如表面断裂或模头流液。虽然对聚合物的表面和界面性质有很多了解，但缺乏与聚合物的分子结构、其局部结构、界面处的组成和动态性质以及宏观行为相关的详细模型。在这项工作中，我们将提供所需的分子水平的理解，这将推动复杂的，定量的和现实的模型的发展。我们将专注于两种现象，表面诱导的聚合物结晶和流动下的聚合物熔体的滑移，这两种表现形式的界面链动力学主要取决于链长，结构和表面上的吸附。