Interphase Partitioning in Multiconstituent Polymer Systems

在多组分聚合物中， 为了使最低能量成分优先吸附在 表面，或对于表面活性剂样物质， 存在于聚合物-聚合物界面。 发生这 相间分配可以显著改变表面和/或 多组分聚合物的界面性能，是 许多商业方法的基础表面性能 改性 这项研究代表了一项全面的努力， 了解这些现象背后的基本原理 通过在几个模型系统上进行彻底的实验。 这些 包括可混溶均聚物共混物、不混溶的三元 均聚物/均聚物/嵌段共聚物共混物，功能性 封端的均聚物，以及官能化的 封端的均聚物与第二均聚物。 表面张力和表面化学性质的表征 结构和组成是通过应用 目前的表面和界面分析技术的数量 为了将这些特征与大体积物理和 成分的热力学参数。 的可用性 这些信息将有助于分子设计， 用于多组分聚合物的表面和界面改性剂。

In multiconstituent polymers there exists a driving force for the lowest energy constituent to preferentially adsorb at the surface, or for a surfactant-like species to preferentially reside at a polymer-polymer interphase. The occurrence of this interphase partitioning can drastically alter the surface and/or interfacial properties of multicomponent polymers, and is the basis of many commercial methods for surface property modification. This research represents a comprehensive effort to understand the fundamental principles underlying these phenomena by thorough experimentation on several model systems. These include miscible homopolymer blends, immiscible ternary homopolymer/homopolymer/block copolymes blends, functionally terminated homopolymers, and immiscible blends of functionally terminated homopolymer with a second homopolymer. Characterization of the surface tension, and surface chemical structure and composition is accomplished by application of a number of current surface and interface analysis techniques in order to relate these features to the bulk physical and thermodynamic parameters of the constituents. The availability of this information will assist in the molecular design of surface and interfacial modifiers for multiconstituent polymers.