摘要
在质量分数30%玻璃纤维(GF)增强聚对苯二甲酸丁二酯(PBT)的基础上,通过引入不同含量的聚对苯二甲酸乙二酯(PET)组分制备了不同PBT/PET比例的合金。系统研究了PET含量对合金的傅立叶变换红外光谱(FTIR)、熔融结晶行为、力学性能、流动性能及外观的影响。实验结果显示:PET引入后,合金的FTIR谱图中出现了PET特征吸收峰(1 341cm-1);由于发生了部分酯交换反应,合金中PBT和PET的结晶能力减弱;PET的加入提高了GF增强PBT的力学性能,拉伸强度和弯曲强度分别能够提高10.1%和8.9%;相较于GF增强PBT,GF增强PBT/PET合金的流动性有所提高;同时,GF增强PBT/PET合金注塑制品的外观得到显著改善,样品表面浮纤面积占比由GF增强PBT的7.6%降低至GF增强PBT/PET合金(PET质量分数为40%)的0.4%。当PET质量分数为20%～35%时,所得PBT/PET合金同时具备优异的力学性能和良好的外观。
By introducing different amounts of polyethylene terephthalate (PET) into 30%(mass fraction) fiber glass (GF) reinforced polybutylene terephthalate (PBT),the alloys with different PBT/PET proportions were prepared. The effects of PET on the FTIR spectrum,melting crystallization behaviors,mechanical properties,flow properties and appearance of the alloys were systematically studied. The results show that the PET characteristic absorption peak (1 341 cm^-1) newly appears in the FTIR spectrum of the alloy. After the introduction of PET,the crystallization capacity of both PBT and PET were decreased due to ester exchange reaction. The addition of PET increases the mechanical properties of GF reinforced PBT,the tensile strength and bending strength increase by 10.1% and 8.9%,respectively. Compared with GF reinforced PBT,the fluidity of PBT/PET alloy is also improved. Meanwhile,the appearance of the molded PBT/PET alloy products is significantly improved,in which the proportion of floating fiber area decreases from 7.6% of GF reinforced PBT to 0.4% of GF reinforced PBT/PET alloy (the mass fraction of PET is 40%). When the mass fraction of PET is 20%–35%,the obtained PBT/PET alloy has both excellent mechanical properties and good appearance.
作者
叶士兵
张超
罗忠富
Ye Shibing;Zhang Chao;Luo Zhongfu(Shanghai Kingfa Sci. & Tech. Co., Ltd., Shanghai 201714, China;Jiangsu Kingfa Sci.& Tech. Advanced Materials Co., Ltd.,Kunshan 215300, China;Jiangsu Polymer Alloy Materials Engineering and Technology Research Center, Kunshan 215333, China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2019年第1期8-14,共7页
Engineering Plastics Application
关键词
聚对苯二甲酸丁二酯
聚对苯二甲酸乙二酯
力学性能
外观
酯交换反应
polybutylene terephthalate
polyethylene terephthalate
mechanical property
appearance
transesterification reaction
