摘要
混合热计算和FTIR分析表明，聚对苯二甲酸乙二酯（PET）与聚苯膦酸二苯砜酯（PSPPP）具有一定的相容性．不同PSPPP含量的PET均具有较高的热稳定性，PET／PSPPP体系的阻燃性随阻燃剂PSPPP含量的增加而提高，PSPPP重量百分含量为5％（下同）的阻燃PET体系的LOI值可达到30．1．由不同分子量的PSPPP构成的各种配比的PET体系，其表现粘度随切变速率的增大而降低，PSPPP的分子量较低的阻燃体系比分子量较高的体系具有更低的粘度，其差值随温度的升高而增大．
The molecular-chain-level interactions between polyethylene terephathalate(PET)and polysulfonyldiphenylene phenylphosphanate (PSPPP) have been investigated by FTlR.The existence of the interactl0ns shows the miscibility of PET and PSPPP. PET/PSPPP flame-retardant systems have a very high thermal stabillty, and do not decompose at the processlng temperature of PET. The limlting oxygen index (LOI) values of the systems increase with the content of PSPPP, and are almost not affected by the molecular weights of PSPPP and the blending methods. At the processing temperatures of PET, PSPPP with lower molecular weights, say Mn＜4 OOO, will cause the degradation of PET, which can be to a certain extent inhibited by adding a stabilizer to the systems. As the results of those, the apparent viscosities of PET/PSPPP systems with lower molecular weights of PSPPP are higher than those with higher molecular weights of PSPPP. The addition of the stabilizer can decrease their viscosity differences. The apparent viscosities of varlous PET/PSPPP syStems decrease with the increase of shear rate and the content of PSPPP, and do with the rise of temperature.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第3期472-476,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
聚酯
PET
PSPPP
相容性
流变性
阻燃性
热降解
PET, Poly(sulfonyldiphenylene phenylphosphanate),Miscibility,Rheological Property, Flame retardancy
