The aim of this work was to investigate the effect of addition of various amounts of zinc oxide (ZnO) nanoparticles on the polylactide/polycaprolactone (PLA/PCL) blend prepared by melt mixing method. The morphological, rheological and degradation of prepared nanocomposites were studied. The morphology was characterized as dispersed PCL droplets into the PLA matrix, and according to Young's equation, zinc oxide nanoparticles (ZnO-NPs) was anticipated to preferentially locate in the matrix phase. The results of ATR-FTIR and the hydrolytic degradation tests demonstrated that, addition of ZnO-NPs introduced an accelerated degradation on the PLA/PCL blends. Subsequently, comprehensive linear viscoelastic evaluations were carried out to support these results and also give a deeper insight on the possible influences associated with the ZnO-NPs incorporation. Rheological results showed that with increasing nanoparticles, the elastic modulus and the complex viscosity decreased, which it was correlated to the degradation and chain scission of polymeric chains induced by ZnO-NPs.

这项工作的目的是研究添加不同数量的氧化锌（ZnO）纳米粒子对通过熔融混合法制备的聚丙交酯/聚己内酯（PLA / PCL）共混物的影响。研究了制备的纳米复合材料的形貌，流变和降解。形态表征为PCL液滴分散到PLA基质中，根据杨氏方程，预计氧化锌纳米颗粒（ZnO-NPs）优先位于基质相中。ATR-FTIR和水解降解试验的结果表明，添加ZnO-NPs可以加速PLA / PCL共混物的降解。随后，进行了全面的线性粘弹性评估以支持这些结果，并且还对与ZnO-NPs掺入有关的可能影响提供了更深入的认识。流变学结果表明，随着纳米颗粒的增加，弹性模量和复数粘度降低，这与ZnO-NPs引起的聚合物链的降解和断链有关。