Material Analysis
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Large molecular weight decrease after PLA mechanical recycling
Problem Phenomenon
After mechanical recycling, the intrinsic viscosity of PLA decreases by >20%.
Cause Analysis
The combination of thermal and mechanical degradation causes molecular chain breakage and a large decrease in molecular weight.
Solution
Reduce the recycling processing temperature; add a chain extender to restore the molecular weight.
Key Takeaway
The molecular weight decay of PLA recycling is a reuse challenge.
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