Evidence from infrared Ellipsometry for covalent onding at a Polymer/polymer interface with relevance to 'Lock-up' in pressure-sensitive adhesive laminates

摘要

In a novel applicaton,infrared spectroscopic ellipsometry is used to provide clear evidence for the formation of covalent bond at a polymer/polymer interface.Specifically,there is evidence for the silyl(SiH) group of a poly(hydrogen mehtyl siloxane)cross-linker used in poly(dimethyl siloxane) and the carboxylic acid group of Poly(acrylic acid).This covalent bond formation could explain the source of the "lock-up" that is sometimes found between acrylic pressure-sensitieve adhesives and a silicone-coated release liner.