Material Analysis
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Poor Chemical Resistance of CMC
Problem Phenomenon
After immersion in acid, alkali and solvent, mechanical properties of CMC products decrease by >30%
Cause Analysis
CMC has high affinity for specific chemicals and is eroded and swollen; CMC molecular chains are attacked by chemicals and broken
Solution
1)Select chemical-resistant grade; 2)Micro-crosslinking to reduce swelling; 3)Surface coating protection for products; 4)Add chemical stabilizer
Key Takeaway
Poor chemical resistance is caused by CMC chemical affinity; selecting chemical-resistant grade and coating are the key
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