Material Analysis
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Hydrolytic Aging of CMC
Problem Phenomenon
Mechanical properties of CMC products decrease by >25% in hot and humid environment
Cause Analysis
CMC contains polar groups that hydrolyze and break chains under hot and humid conditions; ester bonds/amide bonds etc. are sensitive to water
Solution
1)Select low-polarity content grade to reduce hydrolysis tendency; 2)Add anti-hydrolysis stabilizer; 3)Coat the product surface with a waterproof layer
Key Takeaway
Hydrolytic aging is caused by polar groups being sensitive to water; selecting a low-polarity grade is the key
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