Thermal modification of poly(vinyl chloride) and formation of dehydrochlorinated poly(vinyl chloride)–poly(methyl methacrylate) polymer blend in the process of foaming: Identification and application

✍ Scribed by M. Jayabalan

• Publisher: John Wiley and Sons
• Year: 1982
• Tongue: English
• Weight: 454 KB
• Volume: 27
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1982.070270105

✦ Synopsis

Impact resistant plastic foam of dehydrochlorinated poly(viny1 chloride) (DHPVC)-poly(methy1 methacrylate) (PMMA) was prepared for cryogenic insulation in space vehicle by the method of compression molding and chemical blowing. Impact resistance was achieved by the formation of the polymer blend, dehydrochlorinated poly(viny1 chloride)-poly(methy1 methacrylate), during the process of foaming the mold a t the temperature of 200'C. The polymer blend was separated from the plastic foam and the compatibility was investigated by ultraviolet, infrared spectral studies and differential scanning calorimetry (DSC). The compatibility of dehydrochlorinated poly(viny1 chloride) and poly(methy1 methacrylate) was highlighted on the basis of allylic activation introduced in the thermally modified poly(viny1 chloride). The thermodynamic views were also correlated. The versatility of the present method for impact-resistant foam was pointed out.