排插用高抗冲阻燃PC/PBT合金的制备与性能
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摘要
采用熔融共混法制备了聚碳酸酯/聚对苯二甲酸丁二醇酯(PC/PBT)合金。在阻燃剂、成核剂等添加量一定的条件下,研究了马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH),丁二烯-苯乙烯-甲基丙烯酸甲酯共聚物(MBS),乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯三元共聚物(E-MA-GMA)3种增韧剂及其含量以及基体树脂中PC/PBT不同配比对PC/PBT合金阻燃性能、耐热性能以及力学性能的影响。结果表明:3种增韧剂中, E-MA-GMA对PC/PBT合金的增韧效果最为优异,当E-MA-GMA质量分数为10.0%, PC/PBT为30/70时,材料的综合性能最佳,能够满足排插材料的行业标准;随着PC含量的增加,PC/PBT合金的力学性能和阻燃性能得到提高,但是PC含量过多时,PC/PBT合金的耐热性能会下降,无法通过球压测试。
The polycarbonate/poly(butylene terephthalate)(PC/PBT) alloy was prepared by melt blending. The effects of three toughening agents(POE-g-MAH, MBS, E-MA-GMA), their contents and PC/PBT different ratios in matrix resin on the flame retardancy, heat resistance and mechanical properties of PC/PBT alloy were studied under the certain additions of flame retardant and nucleating agent. The results show that E-MA-GMA has the best toughening effect on PC/PBT alloy among the three toughening agents. When the mass fraction of E-MA-GMA is 10.0% and PC/PBT is 30/70, the comprehensive performance of the material is the best, and it can meet the industry standard of placement industry. The mechanical properties and flame retardancy of PC/PBT alloy are improved with the increasing of PC content, but the heat resistance of PC/PBT alloy decreases when the PC content is too high, which makes it impossible to pass the spherical pressure test.
The polycarbonate/poly(butylene terephthalate)(PC/PBT) alloy was prepared by melt blending. The effects of three toughening agents(POE-g-MAH, MBS, E-MA-GMA), their contents and PC/PBT different ratios in matrix resin on the flame retardancy, heat resistance and mechanical properties of PC/PBT alloy were studied under the certain additions of flame retardant and nucleating agent. The results show that E-MA-GMA has the best toughening effect on PC/PBT alloy among the three toughening agents. When the mass fraction of E-MA-GMA is 10.0% and PC/PBT is 30/70, the comprehensive performance of the material is the best, and it can meet the industry standard of placement industry. The mechanical properties and flame retardancy of PC/PBT alloy are improved with the increasing of PC content, but the heat resistance of PC/PBT alloy decreases when the PC content is too high, which makes it impossible to pass the spherical pressure test.
引文
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[2] TSENG W, LEE J. Functional MBS impact modifiers for PC/PBT alloy[J]. Journal of Applied Polymer Science, 2015, 76(8):1280-1284.
[3] 张金柱, 徐迎宾, 林晓丹. 新型增容剂对PC/PBT合金性能的影响[J]. 工程塑料应用, 2005, 33(10): 4-7.
[4] BAI H, ZHANG Y, ZHANG Y, et al. Toughening modification of PBT/PC blends by PTW[J]. Polymer Testing, 2005, 24(2):235-240.