Material Analysis 3 Aufrufe

Poor chemical resistance of PU

Problembeschreibung

After soaking in acid-alkali solvents, PU product mechanical properties decrease >30%

Ursachenanalyse

PU has high affinity to specific chemicals, being attacked and swollen; PU molecular chains attacked by chemicals and broken

Lösung

1) Select chemical-resistant grade; 2) Slight crosslinking to reduce swelling; 3) Surface coating protection of products; 4) Add chemical stabilizer

Wichtigste Erkenntnis

Poor chemical resistance is caused by PU chemical affinity; selecting chemical-resistant grade and coating are key

PU chemical resistance chemical attack slight crosslinking surface coating

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