基于快速塑化的电子烟外壳材料的制备
Preparation of Electronic Cigarette Shell Material Based on Rapid Plasticization
为研究综合性能更好的新型的电子烟外壳材料,以聚对苯二甲酸丁二酯(PBT)、聚碳酸酯和丙烯腈-丁二烯-苯乙烯塑料合金(PC/ABS)为基体,并加入催化剂、抗氧化剂、偶联剂、成核剂和增透剂,使用熔融共混法制备PBT/PC/ABS三合金样品,研究PBT含量、催化剂含量、双螺杆挤出机的主机转速和进料转速对合金的拉伸强度、弯曲强度、冲击强度、熔体流动速率和流动性等性能的影响。结果表明:当合金中PBT的含量增加时,合金的拉伸强度和弯曲强度先增强,在PBT质量分数达到80%左右时开始减弱,冲击强度和熔体流动速率则持续下降,流动性显著下降;当催化剂含量增加时,合金的拉伸强度和弯曲强度持续减弱,冲击强度和熔体流动速率增强,当催化剂质量分数超过0.05%时,合金的力学性能崩溃;当双螺杆挤出机的主机转速和进料转速上升时,合金的熔体流动速率持续下降,流动性减弱。当合金中PBT质量分数为78%,PC/ABS质量分数为22%,催化剂质量分数为0.03%时,合金的综合性能最好。
In order to study the new electronic cigarette shell material with better comprehensive performance, polybutylene terephthalate (PBT) and polycarbonate and acrylonitrile-butadiene-styrene plastic alloy (PC/ABS) were used as substrates, and catalysts, antioxidants, coupling agents, nucleating agents and permeability enhancers were added. The PBT/PC/ABS ternary alloys samples were prepared by the melt blending method, and the influence of PBT content, catalyst content, main engine speed and feed speed of the twin screw extruder on the tensile strength, bending strength, impact strength, melt flow rate and fluidity of the alloy were studied. The results show that when the content of PBT in the alloy increases, the tensile strength and bending strength of the alloy increase first then begins to decrease when the mass fraction of PBT reaches about 80%, the impact strength and melt flow rate decrease continuously, and the fluidity decreases significantly. When the amount of catalyst increases, the tensile strength and bending strength of the alloy decrease continuously, and the impact strength and melt flow rate increase. When the mass fraction of catalyst exceeds 0.05%, the mechanical properties of the alloy collapse. When the main engine speed and feed speed of the twin screw extruder increase, the melt flow rate of the alloy decreases continuously and the fluidity decreases. When the mass fraction of PBT in the alloy is 78%, the mass fraction of PC/ABS is 22%, and the mass fraction of catalyst is 0.03%, and the comprehensive performance of the alloy is the best.
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