三烯丙基异氰脲酸酯熔融改性聚丙烯研究

Study on Melt Modification of Polypropylene with Triallyl-isocyanurate

在复合引发剂过氧化二异丙苯(DCP)/过氧化二苯甲酰(BPO)的引发下,采用多官能团单体三烯丙基异氰脲酸酯(TAIC)对聚丙烯(PP)进行熔融接枝改性。采用傅里叶变换红外光谱仪(FTIR)、差示扫描量热仪(DSC)对产物的结构和热性能进行了表征,并测定了产物的凝胶率。结果表明,TAIC的加入使改性PP的凝胶率增大,熔体流动速率减小,当TAIC为5份时,凝胶率达到最大值30.83%,而熔体流动速率达到最小值1.09g/10min。与纯PP相比,PP-g-TAIC的结晶温度和熔融温度都得到一定程度的提高。

Polypropylene （PP） was melt grafted with triallyl isocyanurate （TAIC） through extrusion in presence of initiators DCP and BPO. Structure and thermal properties of modified PP were characterized using Fourier transform infrared spectroscopy （FTIR） and differential scanning calorimetry（DSC）, and the gel rate was also determinated. The result showed that TAIC was successfully grafted onto PP backbone, increased the gel content and decreased the melt flow index. When the loading of TAIC was 5 phr, the gel content reached a maximum of 30. 83 %, meanwhile the melt flow rate dropped to a minimum of 1.09 g/10 min. Compared with virgin PP, modified PP had higher crystalline temperature and higher melting temperature.