1.河南城建学院 材料与化工学院，河南 平顶山 467036;2.郑州大学化工学院，河南 郑州 450001
以铝酸酯偶联剂（ACA）为增容剂，采用熔融共混法制备聚己二酸-对苯二甲酸丁二醇酯（PBAT）/聚乳酸（PLA）/ACA共混材料。利用红外光谱分析仪、熔融指数仪、差示扫描量热仪、旋转流变仪、动态力学热分析仪、扫描电子显微镜和伺服控制拉力试验机分别研究了ACA含量对PBAT/PLA共混体系结构与性能的影响。结果表明，ACA穿插在PBAT和PLA分子链间，与PBAT和PLA发生物理缠绕，增大分子间距离，提高分子链的柔顺性，增强PBAT和PBAT间的作用力，改善了两相的相容性，增加了 PBAT/PLA/ACA共混材料的拉伸韧性，断裂伸长率由250.9 %提高到410.7%。ACA具有显著的增塑效果，使共混体系的熔体质量流动速率增加，共混体系中的储存模量、损耗模量、复数黏度及PBAT和PLA的玻璃化转变温度降低，PLA的结晶度由18.8 %增加到26.6 %。
Poly(adipate butylene-to-terephthalate)/Poly(lactic acid) (PBAT/PLA) blends were prepared by melt blending method used aluminate coupling agent (ACA) as compatibilizer. Effects of ACA contents on the structure and properties of PBAT/PLA blend system were investigated by FT-IR, melt indexer, differential scanning calorimeter, rotational rheometer, dynamic mechanical thermal analyzer, SEM and servo control tensile testing machine. The results showed that ACA interpenetrated between PBAT and PLA molecular chains, causing physical entanglement with PBAT and PLA, increasing intermolecular distance, improving molecular chain compliance, and enhancing the force between PBAT and PBAT. The compatibility of the two phases was improved, and the tensile toughness of PBAT/PLA/ACA blend was increased. The elongation at break of PBAT/PLA/ACA blend was increased from 250.9% to 410.7%. The ACA has a remarkable plasticizing effect, which increased the melt mass flow rate, storage modulus and loss modulus and complex viscosity and the glass transition temperature of PBAT and PLA of the blended system was reduced, and the crystallinity of PLA in the blend system increased from 18.8 % to 26.6 %.