摘要
以聚丁烯对苯二甲酸酯(PBT)为基体,以短切碳纤维为增强体,传统射出成型和超临界流体微细发泡射出成型的方法制备碳纤维增强热塑性复合材料试样,借助万能试验机、冲击试验机、示差扫描热分析仪、热重分析仪等手段,研究了碳纤维质量分数(0、1%、3%、5%、8%、13%)对力学性能和热性能的影响。结果表明:传统射出成形与超临界流体微细发泡射出成形随着碳纤维质量分数的增加,PBT/CF复合材料力学性能趋势基本相同。随着碳纤维质量分数的增加,PBT/CF复合材料的拉伸强度先增加,后略有下降,8%时上升最大为40.2%,韧性均有明显下降的趋势,8%时下降最大为47.2%。在DSC方面,PBT/CF复合材料随着碳纤维质量分数的增加,Tm逐渐上升。当碳纤维质量分数增加13%时,T_m值最高为220.78℃;T_d最高值为407.16℃,提升了3.91℃。
With polybutylene terephthalate（PBT） as the matrix, chopped carbon fiber（CF） as reinforced body, produced carbon fiber reinforced thermoplastic composite sample by traditional injection molding and supercritical fluid fine foam injection molding process. With the help of universal testing machine, impact testing machine, differential scanning calorimetry analyzer（DSC） thermal gravimetric analyzer （TGA） , studied the influences of carbon fiber content （ 0,1% , 3% , 5% , 8% , 13% ） to reinforced PBT/CF composite in the respect of mechanical properties and thermal properties. The results showed that as the increase of carbon fiber content, the trend of influences on PBT/CF composite mechanical properties by traditional injection molding and supercritical fluids were almost same. The tensile strength of PBT/CF composite increased first then decreased slightly, while the toughness decreased significantly. DSC experiment showed the melting temperature of PBT/CF composite gradually increased as the increase of carbon fiber content. When the carbon fiber content increased to 13% , the highest Tm value was 220.78 ℃ and the highest value of Td was 407.16 ℃. Td was raised by 3.91℃.
出处
《塑料》
CAS
CSCD
北大核心
2016年第3期61-64,共4页
Plastics
基金
浙江省2015年高等学校访问工程师校企合作项目
关键词
碳纤维
聚丁烯对苯二甲酸酯
熔融温度
热裂解温度
复合材料
carbon fiber
polybutylene terephthalate
melting temperature
pyrolysis temperature
composite
