Process for improving films of poly(p-methylstyrene) and copolymers thereof by high energy radiation treatments
AssigneeMobil Oil Corporation
InventorHarold A. Arbit
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Abstract
This invention provides a method for improving properties of thermoplastic films that comprises 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 between about 30 megarads and about 70 megarads (preferably between about 40 megarads and about 60 megarads), whereby said films are heat resistant and have increased tensile properties at elevated temperatures.
Claims5
A method for improving properties of thermoplastic films that comprises 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 between about 30 megarads and about 70 megarads, whereby said films are heat resistant and have increased tensile properties at elevated temperatures.
Dependencies are inferred from the claim text.