动态硫化法制备PET/EPDM-g-GMA合金

Preparation and Properties of PET/EPDM-g-GMA Alloys via Dynamic Vulcanization Method

分别采用酚醛树脂(PF)、硫磺(S)与双"2,5"硫化剂(DBPH)作交联剂,研究了甲基丙烯酸缩水甘油酯接枝三元乙丙橡胶(EPDM-g-GMA)的动态硫化对聚对苯二甲酸乙二醇酯(PET)性能的影响。结果表明,采用PF硫化体系且其用量为0.6%、PET和EPDM-g-GMA质量比为70/30的合金的综合性能较好,其冲击强度较PET、未硫化PET/EPDM-gGMA合金分别提高了594%和66%,拉伸强度较未硫化的PET/EPDM-g-GMA提高了19%。动态硫化还提高了PET/EPDM-g-GMA合金的热稳定性、PET的结晶温度和结晶速率。

Using phenolic resin （PF）, sulfur （S） and 2,5-dimethyl-2,5-di（tert-butylperoxy） hexane （DBPH） as erosslinking agent, the effects of dynamic vulcanization of glyceryl methacrylate grafted ethylene-propylene-diene rubber （EPDM-g-GMA） on properties of polyethylene terephthalate （PET） were studied. The results show that the dynamically vulcanized PET/EPDM-g-GMA （70/30） blend with PF curing system and curing agent content of 0.6 % possesses superior properties. Its notched impact strength is higher than those of neat PET and unvulcanized PET/EPDM-g-GMA （70/30） blend by 594 % and 66 %, respectively, and its tensile strength is higher than that of unvulcanized PET/EPDM-g-GMA by 19 %, which is due to the improved compatibility between PET and EPDM-g- GMA via dynamic vulcanization. Moreover, thermal stability of PET/EPDM-g-GMA blends, crystallization temperature and crystallization rate of PET are also improved because of dynamic vulcanization.