可生物降解的半芳香聚酯聚碳酸丙烯酯共聚物/聚己二酸-对苯二甲酸丁二酯共混物的制备及性能表征  

Preparation and Characterization of Biodegradable Poly(propylene carbonate-co-phthalate)/Poly(butylene adipate-co-terephthalate)Blends

作　　者：张田伟 梁嘉欣 岳双双 王拴紧 韩东梅 黄盛 孟跃中 肖敏 Tian-wei Zhang;Jia-xin Liang;Shuang-shuang Yue;Shuan-jin Wang;Dong-mei Han;Sheng Huang;Yue-zhong Meng;Min Xiao(Key Laboratory of Low-carbon Chemistry&Energy Conservation of Guangdong Province,School of MaterialsScience and Engineering,Sun Yat-sen University,Guangzhou 510006;School of Chemical Engineering and Technology,Sun Yat-sen University,Zhuhai 519082)

机构地区：[1]广东省低碳化学与过程节能重点实验室、中山大学材料科学与工程学院,广州510006 [2]中山大学化学工程与技术学院,珠海519082

出　　处：《高分子学报》2023年第8期1144-1154,共11页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号22179149);中央高校基本科研业务费专项资金(项目号171gjc37)资助项目。

摘　　要：采用转矩流变仪对半芳香聚酯聚碳酸丙烯酯共聚物(poly(propylene carbonate-co-phthalate,PPC-P)和聚己二酸-对苯二甲酸丁二酯(poly(butylene adipate-co-terephthalate,PBAT)进行熔融共混,制备了不同比例的PPC-P/PBAT共混物.研究了不同共混温度和PBAT含量对共混物的力学性能、流变特性、热性能、微观形貌和阻隔性能的影响.结果表明,PPC-P/PBAT共混物的性能受共混温度和共混物组分的影响.在PPC-P和PBAT熔体黏度相当的温度下进行共混时得到的共混物性能最佳,扫描电子显微镜(SEM)图像显示在该温度下制备的共混物中2种聚合物能均匀分散且相容性较好;PBAT的加入能够大幅提升材料的热稳定性、断裂伸长率等性能,但同时也会降低材料对水、氧的阻隔性能.综合考虑,PBAT含量为30%~50%的PPC-P/PBAT共混材料是性能优异的食品/药品包装材料,具有优异的拉伸和阻隔性能.Poly(propylene carbonate-co-phthalate)(PPC-P)/poly(butylene adipate-co-terephthalate)(PBAT)blends with various composition ratios were prepared via melt mixing using a torque rheometer.The effects of blending temperature and PBAT content on mechanical behavior,rheological responses,thermal properties,phase morphology and barrier properties of the blends were investigated.Results showed that the properties of PPC-P/PBAT blends were affected by the blend temperature and the composition of the blends.The best performance of the blends is obtained when blending at the temperature where the melt viscosity of PPC-P and PBAT is equivalent,and SEM microphotographs showed that the two polymers in the blends prepared at this temperature could be uniformly dispersed and have good compatibility;Incorporating of PBAT effectively improved the thermal stability,elongation at break and other properties of the blends,but it will also reduce the barrier properties of the material.In a word,PPC-P/PBAT blends with PBAT content of 30 wt%‒50 wt%have excellent tensile and barrier properties and hence have great potential for green food/drug packaging applications.

关 键 词：二氧化碳 生物可降解塑料 聚己二酸-对苯二甲酸丁二酯 阻隔性能 包装材料 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]