Synthesis of micron-sized monodispersed, core-shell composite polymer particles by seeded dispersion polymerization

Authors
Citation
M. Okubo et J. Izumi, Synthesis of micron-sized monodispersed, core-shell composite polymer particles by seeded dispersion polymerization, COLL SURF A, 153(1-3), 1999, pp. 297-304
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN journal
0927-7757 → ACNP
Volume
153
Issue
1-3
Year of publication
1999
Pages
297 - 304
Database
ISI
SICI code
0927-7757(19990815)153:1-3<297:SOMMCC>2.0.ZU;2-5
Abstract
Micron-sized monodispersed polymethyl methacrylate (PMMA)/polystyrene (PS) (PMMA/PS = 2:1, weight ratio) composite particles consisting of PMMA-core a nd PS-shell were successfully produced by seeded dispersion polymerization of styrene in a methanol/water medium in the presence of about 2-mu m-sized monodispersed PMMA particles. It was experimentally clarified that the mor phology was unstable thermodynamically. From these results, it is concluded that seeded dispersion polymerization, in which almost all monomers and in itiators exist in the medium, with seed particles having higher glass trans ition temperature than polymerization temperature has an advantage in produ cing core-shell polymer particles in which polymer layers accumulate in the ir order of formation, even if the morphology is unstable thermodynamically . (C) 1999 Elsevier Science B.V. All rights reserved.