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Effect of Glass Fibers on Rheology, Thermal and Mechanical Properties of Recycled PET

机译：玻璃纤维对再生PET流变，热力学性能的影响

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摘要

PET-glass fiber composites were prepared by melt mixing of recycled PET with chopped glass fibers (15, 20, and 30 wt%) and their degree of dispersion was assessed by scanning electron microscopy. Rotational rheometry was employed to analyze the interfacial shear strength between the fibers and polymer matrix in the molten state. The composite containing 30 wt% of glass fibers revealed a moderate G' secondary plateau; hence strong fiber-matrix interactions were confirmed. Results of mechanical testing were in a good accordance with structural and rheological measurements. The higher rate of mixing under production-scale conditions resulted in lower fiber-matrix adhesion and in a similar level of fiber dispersion as compared to the same mixture compounded on pilot-plant scale. Thermal characterization of the composites was performed by differential scanning calorimetry and total crystalline fraction was analyzed.
机译：通过将回收的PET与短切玻璃纤维（15、20和30 wt％）熔融混合来制备PET-玻璃纤维复合材料，并通过扫描电子显微镜评估其分散度。旋转流变法用于分析熔融状态下纤维与聚合物基体之间的界面剪切强度。包含30wt％玻璃纤维的复合材料显示出中等的G′二次平台;因此证实了强的纤维-基质相互作用。机械测试的结果与结构和流变学测量值非常吻合。与在中试规模上混合的相同混合物相比，在生产规模条件下较高的混合速率导致较低的纤维基质粘附力和类似水平的纤维分散。通过差示扫描量热法进行复合材料的热表征，并分析总晶体分数。

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