聚烯烃改性PET的研究

Study on Modification of PET by Polyolefin

通过PET与PP、HDPE、EPDM挤出共混 ,注射模塑制得试样。经DTA、SEM和力学性能测试 ,表征了共混体系的热行为、结构形态和力学性能。结果表明 ,在PET/PP (EPDM、HDPE)共混体系中 ,加入少量的PP g MI(EPDM g MAH、PE g MI) ,可较好地改善PET与PP (EPDM、HDPE)之间的相容性 ,使分散相在PET基体连续相中分散均匀 ,分散相尺寸减小 ,增加了两相间界面的粘结力 ;同时对PET的结晶有较强的促进作用 ,使其冷结晶温度降低 ,改善了PET的加工性能 ;

PET/PP(EPDM?HDPE) blends were prepared by blending and injection molding The structure and properties of PET / PP (PET/EPDM?PET/HDPE) blends were characterized by means of DTA,SEM and mechanical properties test The results showed that a little amount of PP g MI (EPDM g MAH,PE g MI) could improve the compatibility of PET with PP(EPDM?HDPE), making the dispersion phase well distributed in the continuous phase of PET in the form of small particles, increased the bonding force of the interfaces, decreased the cold crystalline temperature of the blends rapidly and improved the processability of PET The impact strength of the blends increased greatly