A kind of high and low temperature resistant alternately modified polyester alloy material and its preparation method
A technology for modifying polyester and alloy materials, which is applied in the field of high and low temperature resistant alternating modified polyester alloy materials and its preparation, can solve the problems of intensifying the transesterification reaction of PC and PBT, affecting the performance of PC/PBT alloy materials, etc. Achieve stable mechanical properties, good temperature denaturation, and improve temperature resistance and stability
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Embodiment 1
[0029] Put 30 parts of PC, 20 parts of PBT, 8 parts of AX8900, 0.1 part of 1010, 0.1 part of 168, 0.1 part of sodium dihydrogen pyrophosphate, 0.5 part of adipic acid, 0.5 part of EBS and 5 parts of talc into the high-speed mixer Mix for 3 minutes, the mixing temperature is 30°C, and the rotation speed is 800rpm / min; after mixing evenly, use a twin-screw extruder to extrude and granulate, add continuous glass fiber from the glass fiber feeding port, and control the weight of continuous glass fiber to 50 parts, The temperature of the first stage to the fifth stage of the twin-screw extruder is 220°C, 250°C, 260°C, 260°C, 240°C, the temperature of the head is 250°C, the speed is 40Hz, and the speed of the pelletizer is 800r / min.
[0030] Wherein the melt index of PC is 10-22g / 10min (300 ℃ of test conditions, 1.2kg); The optimal raw material performance makes the prepared product more excellent in high and low temperature alternating resistance.
[0031] The modified polyester g...
Embodiment 2
[0033] 30 parts of PC, 25 parts of PBT, 0.5 parts of AX8900, 0.5 parts of 1010, 1 part of 168, 1 part of sodium dihydrogen pyrophosphate, 1 part of disodium hydrogen phosphate, 1 part of triphenyl phosphate, 0.5 parts of adipic acid, 0.5 1 part of polyethylene wax and 3 parts of talcum powder were mixed in a high-speed mixer for 3 minutes, the mixing temperature was 30°C, and the rotation speed was 800rpm / min; Add continuous glass fiber, and control the weight of continuous glass fiber to 37 parts; the temperature of the first to fifth stages of the twin-screw extruder is respectively: 200°C, 240°C, 255°C, 245°C, 240°C, and the head temperature is 230 °C, the rotational speed is 35Hz, and the rotational speed of the pelletizer is 800r / min.
[0034] The extruded granules were dried at 120°C for 4 hours. The dried polyester alloy particles are injection-molded by an injection molding machine for testing, and the injection molding temperature is 220-260° C.
Embodiment 3
[0036] Put 25 parts of PC, 24 parts of PBT, 10 parts of AX8900, 1 part of 1010, 1 part of 168, 0.5 parts of triphenyl phosphite, 1 part of adipic acid, 0.5 parts of polyethylene wax and 3 parts of talc into high-speed mixing Mix in the machine for 4 minutes, the mixing temperature is 20°C, and the rotation speed is 1000rpm / min; after mixing evenly, use a twin-screw extruder to extrude and granulate, add chopped yarn from the side feeding port, and control the weight of chopped yarn to 35 The temperature of the first stage to the fifth stage of the twin-screw extruder is: 220°C, 250°C, 260°C, 250°C, 240°C, the head temperature is 230°C, the speed is 35Hz, and the speed of the pelletizer is 600r / min.
[0037] The extruded pellets were dried at 100 °C for 4 h. The dried polyester alloy particles are injection-molded by an injection molding machine for testing, and the injection molding temperature is 220-260° C.
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