Process for improving films of poly(p-methylstyrene) and copolymers.

摘要

Amethod for improving properties of thermoplastic films by irradiating films of poly(p-methylstyrene) of p-methylstyrene copolymers with acrylonitrile, or of high impact poly (p-methylstyrene) with ionizing radiation at a dosage from 30 to 70 megarads (preferably from 40 to 60 megarads). The irradiated films are heat resistant and have increased tensile properties at elevated temperatures.