Transparent Organic Materials Made from Copolymerization of Styrene with Urethane-Methacrylate Macromer. II. Macromer Mixture System

摘要

A urethane-methacrylate (UM) macromer mixture was prepared by react- ing tolylene diisocyanate with a mixture of 1,4-butylene glycol (as the rigid glycol) and poly(ethylene glycol), followed by end capping with 2-hydroxyethyl methacrylate. The transparent pol~eric material was fabricated by copol~erizing the macromer mix- ture with styrene. The effects of the styrene content and the composition of the macromer mixture on the properties were studied. The results showed that the mate- rial displayed a unique balance of excellent transparency, high heat resistance, good impact strength, and low water absorption, especially when the soft macromer (UM2) content was 20 or 40%. The visible light transmittance was more than 90%, and the refractive index was much higher than that of poly(methyl methacrylate}. All proper- ties were extensively regulated according to practical. demand.