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Elastomeric domain‐type interpenetrating polymer networks
Author(s) -
Silverstein M. S.,
Narkis M.
Publication year - 1987
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/app.1987.070330721
Subject(s) - materials science , elastomer , thermosetting polymer , composite material , thermoplastic elastomer , polymer , ultimate tensile strength , polymerization , emulsion polymerization , rheology , copolymer
Abstract Elastomeric latex interpenetrating polymer networks (IPNs) can result from a two‐stage emulsion polymerization procedure in which styrene is polymerized and cross‐linked on a lightly cross‐linked polyacrylate (PA) seed latex in a ratio of 75 : 25 PA‐PS. The multiphase nature of these IPNs is indicated by two distinct T g s and is confirmed by cold‐stage transmission electron microscopy and by the unique mechanical and rheological properties that are intimately related to the material's structure. PS microdomains reinforce the elastomeric PA, yielding a significant modulus, and interparticle PS physical ties yield a significant ultimate tensile strength. The elastomeric latex IPN's dual thermoset‐thermoplastic nature is revealed in a stick, slip, roll flow mechanism of the cross‐linked submicrometer particles, which can be injection molded as a thermoplastic. The relationships among the polymerization procedure, the structure, and the physical properties are characterized by the examination of several different materials using a variety of analytic techniques.