钛酸酯偶联剂在膨胀型阻燃聚丙烯中的偶联作用

摘要

Effects of titanate coupling agent （TTOPP） on mechanical properties and flame retardancy of polypropylene/intumescent flame retardant （PP/IFR） composites were studied. Micromorphology and crystallization behavior of the composites were analyzed by scanning electron microscope, polarization microscope and X-ray diffraction. It showed that dispersion of IFR and spherulite size of PP became uniform, and TTOPP could promote the formation of β-form crystals. The adhesion between PP and IFR was enhanced by addition of TTOPP. PP/IFR/TTOPP（75/25/0. 375） composite had the optimal properties, and its impact strength and tensile strength were improved by 14. 0 % and 12. 0 %than that of PP/IFR, respectively, and its extinguishing time decreased to 24 s.%研究了钛酸酯偶联剂（TTOPP）对聚丙烯／膨胀型阻燃剂（PP／IFR）复合材料阻燃性能和力学性能的影响，并采用扫描电子显微镜、偏光显微镜和X射线衍射研究了复合材料的微观形态和结晶行为。结果表明，加入TTOPP后，IFR在PP中的分散更加均匀，PP球晶的大小趋于一致，适量的TTOPP改善了IFR与PP闻的相容性，促进了IFR对PP形成8晶的诱导作用。当PP／IFR／TTOPP为75／25／0.375时，复合材料的综合性能最佳，自熄时间降到24s，拉伸强度和冲击强度比PP／IFR分别提高了14．o％和12．0％。