增容剂甲基丙烯酸丁酯接枝聚丙烯的研究

Study the Compatilizer Polypropylene Grafted with Butyl Methacrylate

以甲基丙烯酸丁酯(BMA)为接枝单体,过氧化苯甲酰(BPO)为引发剂,采用固相接枝技术对聚丙烯(PP)进行改性,制备了BMA接枝PP(PP-g-BMA)。研究了接枝反应工艺条件对接枝率的影响,采用傅立叶变换红外光谱表征与分析了PP-g-BMA,并对PP-g-BMA在PP/聚对苯二甲酸乙二酯(PET)共混物中的增容作用进行了验证。结果表明,当反应温度为130℃、引发剂的质量分数为6%、单体BMA质量分数为10%,接枝反应3 h,成功制得了接枝率为3.75%PP-g-BMA;PP-g-BMA可明显改善PP/PET共混物的界面相容性,相对于PP-g-BMH,其增容的PP/PET共混物的力学性能和加工流变性能更好。

Polypropylene grafted with butyl methacrylate(PP-g-BMA) was prepared in solid phase grafting with BMA as grafting monomer and benzoyl peroxide(PBO) as initiator.The graft product was characterized and analyzed by Fourier transform infrared spectroscopy.The effects of reaction temperature,initiator dosage,monomer concentration and reaction time on the grafting ratio were studied and the compatibilization effect of PP-g-BMA on PP/polyethylene terephthalate(PET) blend was also studied.The results show that PP-g-BMA with grafting ratio of 3.75%is successfully prepared after grafting for3 hours at 130 "C when the mass fraction of the initiator and BMA is 6%and 10%separately.PP-g-BMA can evidently improve the interface compatibility of PP/PET,comparing with PP-g-MAH,the mechanical properties and processing rheological property of PP/PET/blend PP-g-BMA are bettter.