Material Analysis
11 조회수
Poor EVOH Weather Resistance
문제 현상
After 6 months outdoors, EVOH mechanical properties decline 40-50% with surface cracking
원인 분석
Photo-oxidative degradation of EVOH polyolefin backbone with molecular chain breakage; UV directly attacks C-C bonds
해결 방법
1) UV-327 0.5-1wt% to absorb UV; 2) HALS-770 0.2-0.5wt% for light stabilization; 3) 1010+168 antioxidant 0.3wt% to prevent oxidation
핵심 요약
Poor weather resistance is caused by photo-oxidation; UV+HALS+antioxidant triple protection is key
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