Research on Environmental Stress Cracking Resistant Polystyrene
By introducing characteristic substances,the environmental stress cracking resistance(ESCR)of polystyrene HIPS resin was improved by 30-40% .The obtained HIPS improved the ESCR performance by nearly 40-60% compared to the HIPS product with only polyisobutylene added,and by nearly 200% compared to the HIPS product with only dimethyl silicone oil added.While significantly improving its environmental resistance and cracking performance,it maintains optimal molecular weight and processing performance.The Mw of the product has excellent impact resistance and tensile performance at 180000-220000,with a maximum of 12-13 KJ/m2(ISO 180)and a low-temperature impact strength(-20℃)of 8-9 KJ/m2(ISO 180).
PolystyreneResistance to environmental stress crackingImpact strengthProcessability
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NSTL
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