Molding Process
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POE toughened PP low-temperature impact insufficient
Problem Phenomenon
POE/PP -20°C impact only 2-3kJ/m², low temperature not up to standard
Cause Analysis
PP low-temperature embrittlement, Tg about -10°C; POE Tg>-50°C, low-temperature toughening weakened
Solution
1) Low Tg POE, Tg about -55°C; 2) POE increased to 20-25wt%; 3) POE-g-MAH 2-3wt%; 4) POE+EPDM composite toughening
Key Takeaway
Low-temperature toughening requires lower Tg and stronger interfacial adhesion
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