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Interfacial diffusion in layered polyesters
Author(s) -
Shah Chirag B.,
Rockett Thomas J.
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960110)59:2<359::aid-app20>3.0.co;2-q
Subject(s) - polyester , materials science , diffusion , polymer science , composite material , polymer chemistry , chemical engineering , thermodynamics , physics , engineering
Microscopic observations of cross sections of laminates of unsaturated polyesters revealed a birefringent zone (interphase) at the interface. Several observations associated with this interphase were made that predicted either beneficial or detrimental effects of the presence of the interphase in the laminate. A study was conducted to identify the origin and to characterize the properties of the interphase. It was proven that the interfacial diffusion of uncured liquid resin into the previously cured resin formed the interphase. The significant effect of the curing of the second layer on the thickness of the interphase was evident. The diffusion kinetics was dependent on the laminate preparation conditions. A correlation was developed that predicts the properties of the interphase based on crosslinking density of layer I and gel time of the resin of layer II. © 1996 John Wiley & Sons, Inc.