Material Analysis 11 조회수

MP fast UV aging

문제 현상

MP after 48h UV irradiation, mechanical properties decline >20%, yellowing

원인 분석

MP molecular chains rapidly degrade by photo-oxidation under UV; surface molecular chains break forming microcracks

해결 방법

1) add UV absorber 0.3-0.5wt% to block UV; 2) add HALS 0.2wt% for radical scavenging; 3) carbon black 2wt% to physically shield UV

핵심 요약

fast UV aging is caused by photo-oxidation; UV absorber and HALS are key

MP UV aging UV absorber HALS radical scavenging

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