改性勃姆石对聚丙烯性能影响研究

将勃姆石用酞酸酯偶联剂（TC-114）进行活化改性处理，将其与聚丙烯（PP）进行熔融挤出得到PP/改性勃姆石复合材料，采用热重分析仪、差示扫描量热仪、极限氧指数测试仪、锥形量热仪等探究改性后勃姆石对PP性能的影响。结果表明，经过偶联剂处理的勃姆石填充PP后所得的复合材料的弯曲强度与纯PP对比的提高了14.4 %，冲击强度提升了30.6 %，而与未改性勃姆石填充的复合材料比弯曲强度提高了6.9 %，冲击强度提升了5.7 %，且断裂伸长率相较于未改性的复合材料提升4倍；改性勃姆石填充聚丙烯复合材料的熔体流动速率、热稳定性以及极限氧指数相较于纯PP都有较大程度提升；改性后的勃姆石有增强聚丙烯力学性能性能的效果，并且随着填入量的增加，热稳定性和阻燃性能都随之提高。

Effect of Modified Boehmite on Properties of Polypropylene

Boehmite was activated and modified with a phthalate coupling agent （TC-114）， and polypropylene （PP）/BM composites were then prepared by melting extrusion. The effect of modified boehmite on the performance of the composites was investigated. The results indicated that the composites with the modified boehmite achieved an increase in flexural strength by 14.4 % and in impact strength by 30.6 % in comparison to pure PP. However， in the case of the composites with the unmodified boehmite， their flexural strength and impact strength only increased by 6.9 % and 5.7 %， respectively. However， the elongation at break of the composites with the modified boehmite was 4 times as much as those with the unmodified boehmite. In addition， the melt flow rate， thermal stability， and limiting oxygen index of the composites were also improved due to the use of the modified boehmite. The higher content of the modified boehmite can lead to better thermal stability and flame retardant properties.