Polymer blends from polyurethane and poly(methyl methacrylate) by reaction injection molding

✍ Scribed by K. Kircher; W. Mrotzek; G. Menges

• Publisher: Society for Plastic Engineers
• Year: 1984
• Tongue: English
• Weight: 796 KB
• Volume: 24
• Category: Article
• ISSN: 0032-3888
• DOI: 10.1002/pen.760241206

✦ Synopsis

Abstract

The simultaneous production of polyurethane (PUR) and polymethyl methacrylate (PMMA), starting from a mixture of polyol, polyisocyanate, and vinyl monomer, results in 2‐phase polymer alloys. A simultaneous crosslinking of the PMMA is unable to prevent phase separation during the curing reaction; interpenetrating polymer network (IPN) structures were not found, Grafting the PMMA onto the PUR through the incorporation of 2‐hydroxyethylacrylate resulted in single‐phase systems. Various material combinations did not show, with a relatively high PMMA content, any poorer properties than the straight PUR. A major advantage of incorporating low‐viscosity vinyl monomers lies in the fact that high‐viscosity polyurethane starting components that are otherwise difficult or impossible to process can be processed here without problem.