Material Analysis
11 조회수
Poor PVA chemical resistance
문제 현상
After immersion in acid, alkali or solvent, PVA product mechanical properties decrease >30%
원인 분석
PVA has high affinity for specific chemicals and is eroded and swelled; PVA molecular chains attacked by chemicals and broken
해결 방법
1) Select chemical-resistant grade; 2) Slight crosslinking to reduce swelling; 3) Product surface coating protection; 4) Add chemical stabilizer
핵심 요약
Poor chemical resistance is caused by PVA chemical affinity; selecting chemical-resistant grade and coating are the key
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