US EPA

6617490 

Journal Article 

Transparent organic materials made from copolymerization of styrene with urethane-methacrylate macromer. I. Monomacromer system 

Li, YJ; Wang, GS; Yan, DY; , 

2001 

Yes 

Journal of Applied Polymer Science
ISSN: 0021-8995
EISSN: 1097-4628 

JOHN WILEY & SONS INC 

NEW YORK 

80 

3 

348-357 

English 

10.1002/1097-4628(20010418)80:3<348::AID-APP1106>3.0.CO;2-4 

WOS:000167228200005 

https://www.scopus.com/inward/record.uri?eid=2-s2.0-17744393638&doi=10.1002%2f1097-4628%2820010418%2980%3a3%3c348%3a%3aAID-APP1106%3e3.0.CO%3b2-4&partnerID=40&md5=2af5638c1f39127c612830ffb615c612
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Urethane macromers were prepared by reacting tolylene diisocyanate with various glycols, followed by end capping with 2-hydroxyethyl methacrylate in the presence of dibutyltin dilaurate as the catalyst. Various proportions of styrene to the urethane-methacrylate macromer were adopted to cure at 70 degreesC for 7-8 h. The effect of the composition on the properties was systematically studied. These transparent materials exhibited excellent mechanical and optical properties and heat deflection temperature. All of the copolymer sheets had a transmittance similar to the poly(methyl methacrylate) sheet and had a rather high refractive index. The mechanical and thermal properties varied with the ratio of styrene to macromer and with the kind of glycol used in the synthesis of the macromer. (C) 2001 John Wiley & Sons, Inc.