用熔融法制备了马来酸酐(MAH)及其与苯乙烯(St)混合单体改性PP/PS共混物,以及MAH、St改性聚丙烯(原位形成PP/PS共混物).用DSC、DMA和FT-IR研究了改性共混物的结晶与熔融行为、动态力学性能和接枝产物.结果表明,MAH加入对PP/PS共混物中PP的结晶温度影响不大,但其与St混合单体对共混物中PP的结晶温度影响明显,原位生成PP/PS的结晶温度也有较大提高.改性对共混物中PP的熔融温度影响不大,但熔融峰形变化明显.改性PP/PS共混物具有高的E′和E″强度.教育部聚合物基复合材料及功能材料重点实验室, 广东广州 510275)
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