Linear and nonlinear viscoelastic approaches are used to study multiphase biobased blends of poly(lactic acid), poly(amide 11), poly(ether-b-amide) (PEBA), and poly(ethylene oxide) (PEO) in a wide range of compositions. The novelty of this work resides in (a) the study of hybrid quaternary blends with droplet-matrix as well as cocontinuous morphology, (b) the effect of the PEO and PEBA blend components on the rheological properties, and (c) the investigation of the nonlinear viscoelastic regime for complex hybrid blends. Correlations are established between blend morphology and rheological behavior. Among the different linear rheological approaches, i.e., elastic modulus, complex viscosity, yield stress, Cole–Cole plots, Han plots, and Mavridish–Shroff or Booij–Palmen plots, the latter is the most sensitive allowing extraction of a relaxation time from the plot. The results correlate reasonably well with the different morphologies of the blends. Both, linear and nonlinear methods lead to compatible results, distinguishing among blends with droplet-matrix, partially continuous dispersed phase and fully cocontinuous morphologies. Moreover, for the first time, the analysis of the nonlinear parameter, Q₀, allows a qualitative comparison of the interfacial areas of blends with a dispersed phase-matrix morphology at different continuity levels and those with cocontinuous morphology.

中文翻译：

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复杂的生物基四元混合物的流变学：聚乳酸[聚环氧乙烷] /聚醚-b-酰胺/聚酰胺11

线性和非线性粘弹性方法用于研究聚乳酸，聚酰胺11，聚醚-b的多相生物基共混物-酰胺）（PEBA）和聚环氧乙烷（PEO）组成广泛。这项工作的新颖性在于（a）研究具有液滴基质的杂四元共混物以及共连续形态，（b）PEO和PEBA共混物组分对流变性能的影响，以及（c）研究复杂混合共混物的非线性粘弹性体系。在共混物形态和流变行为之间建立了相关性。在不同的线性流变方法中，即弹性模量，复数粘度，屈服应力，Cole-Cole图，Han图和Mavridish-Shroff或Booij-Palmen图，后者是最敏感的，允许从中提取松弛时间。阴谋。结果与共混物的不同形态合理地相关。两个都，线性和非线性方法可得到兼容的结果，可区分具有液滴矩阵，部分连续分散相和完全共连续形态的共混物。而且，这是第一次对非线性参数进行分析，Q ₀允许对具有不同连续性水平的分散相-基质形态和具有连续性形态的混合物的界面面积进行定性比较。