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Modification of aqueous polyurethanes by forming latex interpenetrating polymer networks with polystyrene
Authors:J S Lee  J H Shin  B K Kim  Y S Kang
Institution:(1) Department of Polymer Science and Engineering, Pusan National University Pusan 609–735, Korea e-mail: bkkim@pnu.edu Tel.: +82-51-5102406 Fax: +82-51 5141726, KR;(2) Department of Chemistry Pukyung National University Pusan 608–737, Korea, KR
Abstract:A series of latex particles with interpenetrating polymer network structure have been synthesized from waterborne polyurethane (PU) and polystyrene (PS). The effect of PU/PS composition, cross-linking density in the PS domain as well as in PU have been studied in terms of dispersion size, transmission electron microscopy morphology, mechanical and dynamic mechanical properties in addition to swellability in water and toluene of the dispersion cast film. It was found that inverted core (PS)–shell (PU) morphology was well defined and that the domain size as well as the film properties were well controlled by the latex composition and cross-linking density of both phases. Received: 15 March 2000 Accepted: 21 February 2001
Keywords:Latex interpenetrating polymer network  Polyurethane  Polystyrene
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