Polymer-Polymer Interfaces in Blends and Composites.

摘要

The principal focus of this research has been on improving adhesion at the polymer-polymer interface in order to achieve useful polymer blends and certain composites. Adhesion measurements were made on several systems to demonstrate that favorable enthalpic interactions between the segments of a block copolymer and a homopolymer substrate can improve their adhesion and that appropriate chemical reactions at the polymer-polymer interface also promote adhesion. These principles were used for developing polymer blends that are tough. The matrix materials of the systems examined include polyamides, styrene/acrylonitrile copolymers, styrene/maleic anhydride copolymers, etc. Composites based on liquid crystalline polymers were examined briefly. Gas transport properties in selective systems are also included. A useful way for introducing chemical functionality for in-situ reactions at the polymer-polymer interface is to add a polymer having this functionality which is miscible with one of the components. Several examples of such miscible systems were discovered and are reported here.