Processing Machinery
7 visualizações
Poor thermal stability of methyl methacrylate-butadiene-styrene copolymer during processing
Fenómeno do problema
Methyl methacrylate-butadiene-styrene copolymer has poor thermal stability during processing; performance decreases significantly after repeated processing, with severe degradation
Análise das causas
Insufficient antioxidant addition or improper type
Processing temperature too high (exceeding the 180-220°C upper limit) accelerates degradation
Excessive screw shear accelerates thermo-oxidative degradation
Regrind ratio too high, degradation accumulates
Antioxidants fail at high temperature
Solução
Increase antioxidant addition amount
Reduce processing temperature to a reasonable value of 180-220°C
Reduce screw rotation speed to reduce shear
Reduce regrind ratio ≤15%
Select antioxidants with good high-temperature stability
Conclusão principal
Thermal stability needs to start from antioxidants and temperature control
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!