Material Analysis
5 조회수
PU hydrolytic aging
문제 현상
In hot and humid environment, PU product mechanical properties decrease >25%
원인 분석
PU contains polar groups that hydrolyze and break chains under hot and humid conditions; ester bonds/amide bonds etc. are sensitive to water
해결 방법
1) Select low polarity content grade to reduce hydrolysis tendency; 2) Add anti-hydrolysis stabilizer; 3) Coat product surface with waterproof layer
핵심 요약
Hydrolytic aging is caused by polar groups being sensitive to water; selecting low polarity grade is key
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