摘要
将聚磷酸铵(APP)、焦磷酸钠(SPP)及磷酸三苯酯(TPP)作为酯交换反应抑制剂,分别与聚对苯二甲酸丁二醇酯(PBT)/聚碳酸酯(PC)进行熔融共混,并对不同共混体系的性能进行了研究。DSC用于研究抑制剂与PBT/PC共混体系共混物的结晶行为变化。结果表明,延长共混时间,酯交换反应程度提高,PBT结晶能力减弱,结晶温度降低,三种磷酸化合物对PBT/PC共混物的酯交换反应都能起到抑制作用;DMA用于研究了共混物的相容性,结果表明,抑制剂加入导致PBT与PC发生相分离;红外光谱用于研究共混物基团的特征吸收峰变化情况,结果证明,抑制剂不能完全阻止酯交换的发生;冲击试验机用来测试共混物的冲击强度的变化,结果发现,纯PBT/PC的冲击强度为24 J/m,含有抑制剂的共混物的冲击强度提高,加入TPP后的共混体系缺口冲击强度达到130 J/m左右。
In this paper, ammonium polyphosphate（ APP）, sodium pyrophosphate（ SPP） and triphenyl phosphate（TPP） were used as inhibitors of the transesterification and melt blended with the PBT/PC and the properties of different blends were studied.The crystallization of the blends with the inhibitors was studied by DSC.The results showed,with the increase of blending time,the degree of transesterification reaction increased, which decreased the crystallization ability of PBT and induced lower crystallization temperature.All of the phosphate compounds displayed the inhibition effect on the transesterification reaction.The compatibility of the blends was studied by DMA,and the result indicated the phase separation took place for the PBT and PC due to the addition of phosphate compounds.The strength of the characteristic absorption peak of the blends was studied by FTIR which proved that the phosphate compounds could not inhibit the transesterification reaction completely.The impact strength of the blends was tested by an Izod impact tester.The impact strength of PBT/PC blend was about 24 J/m,and the addition of phosphate compounds improved the impact strength of PBT/PC blends.As for the PBT/PC/TPP blend,impact strength of 130 J/m was achieved.
出处
《塑料工业》
CAS
CSCD
北大核心
2014年第10期32-35,共4页
China Plastics Industry
基金
国家自然科学基金(51273025)
