Production & Quality
4 조회수
MP products yellowing after processing
문제 현상
MP products gradually yellow on the surface after 1 week of storage, color difference ΔE>3
원인 분석
incomplete antioxidant system, thermal oxidative degradation produces yellow products; UV irradiation accelerates photo-oxidation; residual transition metal catalysts catalyze oxidation
해결 방법
1) improve the antioxidant system 1010(0.1)+168(0.1)+DSTDP(0.2)wt%; 2) add UV absorber 0.2-0.5wt%; 3) add metal deactivator 0.05wt%; 4) select low-residue raw material grades
핵심 요약
yellowing is caused by thermal/photo-oxidation and metal catalysis; improving the antioxidant system and UV absorber is key
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