初探一种磷酸盐对PBT和PC之间酯交换反应的抑制

A Preliminary Study of the Inhibition Effect of Phosphate on the Transesterification between PBT and PC

通过用两次循环DSC法考察在增强和阻燃增强PBT/PC合金体系中一种磷酸盐(ZP)对PBT组分熔融结晶行为的影响来间接表征了ZP对PBT和PC之间酯交换反应的抑制作用。实验结果发现,在增强PBT/PC体系中,ZP可以有效抑制PBT与PC之间的酯交换反应;在溴化环氧树脂阻燃体系中,溴化环氧树脂本身就可以有效地抑制PBT和PC之间的酯交换反应,而添加ZP对PBT和PC之间的酯交换反应基本上没有进一步的抑制作用;在溴化聚碳酸酯阻燃体系中,当ZP的添加量达到1%时,可以明显地抑制PBT和PC之间的酯交换反应。

The influence of phosphate ZP in the melting and crystallization behavior of PBT in the glass fiber reinforced polybutylene terephthalate/polycarbonate（PBT/PC）alloys using two cycles of differential thermometry scanning were examined in this article,as well as in the glass fiber reinforced PBT/PC alloys flame retarded with brominated epoxy or bromianted plolycarbonate,in order to indirectly evaluate the inhibition effect of ZP on the transesterification between PBT and PC.Results showed ZP could effectively inhibit the transesterification between PBT and PC in the glass fiber reinforced PBT/PC alloys.Brominated epoxy could greatly inhibit the transesterification between PBT and PC in the glass fiber reinforced and flame retardant PBT/PC alloys,while the incorporation of ZP into this system resulted no further inhibition of the transesterification between PBT and PC.The transesterification between PBT and PC could effectively inhibited in the glass fiber reinforced PBT/PC alloys flame retarded with brominated polycarbonate when the dosage of ZP was 1%.