以丁腈橡胶接枝甲基丙烯酸缩水甘油酯-苯乙烯共聚物[NBR-g-(GMA-co-St)]为相容剂,制备了聚对苯二甲酸丁二醇酯/聚丙烯(PBT/PP)复合材料。通过傅利叶红外光谱仪(FT-IR)对丁腈橡胶接枝物进行结构分析,通过力学、动态力学分析(DMA)、差示扫描量热仪(DSC)、热失重(TG)和扫描电子显微镜(SEM)等分析手段对复合材料进行表征。结果表明:接枝过程中加入与甲基丙烯酸缩水甘油酯(GMA)同质量比的苯乙烯能有效地提高相对接枝度,降低交联度;NBR-g-(GMA-co-St)具有增韧作用,添加NBR-g-(GMA-co-St)使PBT/PP复合材料的冲击强度上升,拉伸强度下降;NBR-g-(GMA-co-St)的加入使分散相粒子尺寸变小,改善了复合材料的相容性;相容剂的加入降低了复合材料的熔融温度和结晶温度。
Poly(butylene terephthalate)(PBT)/polypropylene (PP) composites were prepared with nitrile rubber grafted glycidyl methacrylate-styrene copolymer [NBR-g-(GMA-co-St)].The structure of NBR grafts copolymer was analyzed by Fourier transform infrared spectroscopy (FT-IR).The composites were characterized by mechanical,dynamic mechanical analysis (DMA),differential scanning calorimetry (DSC),thermal weight loss (TG) and scanning electron microscope (SEM).The results showed that the addition of styrene with the same mass ratio as glycidyl methacrylate (GMA) effectively improved the relative degree of grafting and reduced the degree of crosslinking;NBR-g-(GMA-co-St) had toughening effect.The addition of NBR-g-(GMA-co-St) increased the impact strength,but decreased the tensile strength;The addition of NBR-g-(GMA-co-St) reduced the particle size of the dispersed phase and improved the compatibility of the composites;The addition of compatibilizer decreased the melting temperature and crystallization temperature of the composites,but decreased the thermal stability of the composites.
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基金资助
国家自然科学基金(21704008);江苏省自然科学基金面上项目(BK20201449);江苏省高等学校自然科学研究重大项目(20KJA430011)
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