Ternary blends comprising poly(L-lactide) (PLLA), ethylene-ethyl acrylate-glyceryl methacrylate terpolymer (EGA), and poly(D-lactide) (PDLA) were melt blended using low-temperature method to obtain blends with balanced properties. The formation of stereocomplex polylactide (SC-PLA) crystals was verified by torque changes and differential scanning calorimetry (DSC) results. The SC-PLA crystals formed a percolating network in the PLLA matrix at a concentration of 2 wt% PDLA, and blend melt presented solid-like rheological behavior. Attributing to the increased viscosity ratio between PLLA and EGA, the size of dispersed EGA phase increased. The crystallization of PLLA was significantly promoted because of the nucleation effect of SC-PLA crystals. The PLLA/EGA/2 %PDLA ternary blends with elongation at break of 138 % and impact strength of 72.3 kJ/m exhibited excellent toughness. These ternary blends demonstrated exceptional crystallization ability and tailored rheological and mechanical properties, opening a new path for developing high-performance PLLA-based materials in packaging industry.

中文翻译：

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通过引入立体络合物聚丙交酯晶体改善聚(L-丙交酯)/乙烯-丙烯酸乙酯-甲基丙烯酸甘油酯三元共聚物(EGA)的性能

采用低温熔融共混法熔融共混聚L-丙交酯(PLLA)、乙烯-丙烯酸乙酯-甲基丙烯酸甘油酯三元共聚物(EGA)和聚(D-丙交酯)(PDLA)三元共混物，得到性能均衡的共混物。通过扭矩变化和差示扫描量热法（DSC）结果验证了立体复合聚丙交酯（SC-PLA）晶体的形成。当 PDLA 浓度为 2 wt% 时，SC-PLA 晶体在 PLLA 基质中形成渗滤网络，并且共混熔体呈现出类似固体的流变行为。由于 PLLA 和 EGA 之间的粘度比增加，分散的 EGA 相的尺寸增加。 SC-PLA晶体的成核效应显着促进了PLLA的结晶。 PLLA/EGA/2%PDLA三元共混物的断裂伸长率为138%，冲击强度为72.3 kJ/m，表现出优异的韧性。这些三元共混物表现出卓越的结晶能力以及定制的流变和机械性能，为包装行业开发高性能 PLLA 基材料开辟了新途径。