Molding Process
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Low-temperature brittleness of PMMA products
Problem Phenomenon
PMMA impact strength drops greatly at low temperatures and becomes brittle.
Cause Analysis
PMMA β transition temperature is about 20-40°C; at low temperatures, molecular chain segment motion is restricted and embrittlement is aggravated.
Solution
Use toughened grade PMMA; avoid notches and sharp corners in product design.
Key Takeaway
PMMA is limited in low-temperature applications.
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