New Concepts in Adhesion Promotion and Modification at Polymer-Polymer Interfaces

9502977 Koberstein这研究了两个新的概念，以增加粘合力和修改不混溶聚合物共混物的界面。 第一个概念使用吸附在共混物界面的多分散嵌段共聚物，以增加共聚物到均聚物基体中的互穿和缠结。 将研究多分散性对临界胶束浓度、共聚物向界面的扩散速率和共聚物提供的界面张力降低的影响。 第二个概念使用末端官能嵌段共聚物作为界面改性剂。 表面活性助粘剂的概念是基于表面活性嵌段共聚物的末端官能化。 当低能量块在表面吸附时，它会带来端基，端基就在表面之下。 当与极性材料接触时，端基重排以与极性材料相互作用或反应，桥接基质聚合物和极性材料之间的界面，从而充当表面活性粘合促进剂。 控制和聚合物界面和表面将导致聚合物共混、粘合剂和涂层技术的快速发展，这些技术对美国工业的科学和技术基础至关重要。 ***

9502977 Koberstein This investigates two new concepts to increase adhesion and modify interfaces in immiscible polymer blends. The first concept uses polydisperse block copolymers adsorbed at the blend interface to increase interpenetration and entanglement of the copolymer into the homopolymer matrix. The effects of polydispersity on the critical micelle concentration, the rate of diffusion of the copolymer to the interface and the interfacial tension reduction afforded by the copolymer will be investigated. The second concept uses end-functional block copolymers as interfacial modifiers. The concept, coined surface active adhesion promoters, is based upon the end-functionalization of a surface active block copolymer. When the low energy block adsorbs at the surface, it brings with it the end group, which lies just below the surface. When contacted with a polar material, the end groups rearrange to interact or react with the polar material, bridging the interface between the matrix polymer and polar material, thereby acting as a surface active adhesion promoter. %%% The control and polymer interfaces and surfaces will lead to rapid advances in polymer blending, adhesives and coating technologies vital to the science and technology base of US industry. ***