POLYMERIZATION BEHAVIOR OF A NEW VINYL THIOUREA DERIVATIVE

Citation
Hf. Naguib et al., POLYMERIZATION BEHAVIOR OF A NEW VINYL THIOUREA DERIVATIVE, European Polymer Journal, 32(8), 1996, pp. 985-991
Citations number
13
Categorie Soggetti
Polymer Sciences
Journal title
ISSN journal
00143057
Volume
32
Issue
8
Year of publication
1996
Pages
985 - 991
Database
ISI
SICI code
0014-3057(1996)32:8<985:PBOANV>2.0.ZU;2-E
Abstract
1-Methacryloyl-3-phenylthiourea (MAPTU) has been prepared and polymeri zed by a free-radical mechanism. The polymer formed has low molecular weight. The kinetic orders of the polymerization with respect to monom er and initiator, as well as the overall activation energy, were measu red and found to be those expected for a free-radical scheme. This new monomer showed a tendency for cyclization to give a six-membered hete rocycle. The effects of temperature and solvent on the rate of cycliza tion have been studied. MAPTU monomer and its homopolymer were found t o form complexes with several metal ions. The stability constants of s everal phenyl-substituted MAPTU with Cu were measured and a correlatio n between log K-X/K-H and the Hammett constant was established. The MA PTU-Cu and polyMAPTU-Cu complexes were prepared and their stability co nstants were calculated. MAPTU was copolymerized with styrene and acry lonitrile. The reactivity ratios have been calculated by several metho ds. Copyright (C) 1996 Elsevier Science Ltd.