ВЛИЯНИЕ ГИБРИДНОГО НАПОЛНЕНИЯ КОРОТКИМ СТЕКЛОВОЛОКНОМ И ТЕРМОРАСШИРЕННЫМ ГРАФИТОМ НА СТРУКТУРУ И СВОЙСТВА ПОЛИЭТИЛЕНТЕРЕФТАЛАТА

Doklady Akademii nauk Pub Date : 2018-03-05 DOI:10.29235/1561-8323-2018-62-1-120-128

Владимир Васильевич Дубровский, В. Н. Адериха, Владимир Анатольевич Шаповалов, С. С. Песецкий

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引用次数: 5

Abstract

The effect of short glass fibers (GFs) and thermally expanded graphite (TEG), added to polyethyleneterephtalate (PET), on mechanical, including dynamical mechanical, and rheological properties, as well as the structural features of the produced composites is studied. Compounding with the PET melt is realized by reactive extrusion using a co-rotating twin screw extruder-reactor with L / D = 40. Analyzed composites contained from 15 to 60 wt. % of GFs, and the TEG concentration was 0.5 and 3.0 wt. It is found that hybrid filling of PET results in a synergetic increase of the tensile modulus of the composites reaching the values more than 22 GPa, as well as that of the dynamic shear modulus in a wide temperature range. Adding TEG into PET/GF composites increases the degree of binder crystallinity. An effect of an anomalous decrease in the intrinsic viscosity of PET solutions and an increase in the melt flow index of the melt composites observed at higher GF concentrations is attributed to a deeper degradation of polymer.

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短玻璃纤维和热膨胀石墨混合作用

研究了短玻璃纤维(GFs)和热膨胀石墨(TEG)对聚乙二甲酸乙二醇酯(PET)复合材料力学性能(包括动态力学性能)和流变性能以及结构特征的影响。采用L / D = 40的同向双螺杆挤出反应器，实现了与PET熔体的反应挤出。分析了GFs含量为15 ~ 60 wt. %， TEG浓度为0.5和3.0 wt的复合材料。发现PET的混杂填充导致复合材料的拉伸模量协同增加，达到22 GPa以上的值，以及在很宽的温度范围内的动剪切模量。在PET/GF复合材料中加入TEG可以提高粘结剂的结晶度。在高GF浓度下观察到的PET溶液特性粘度的异常下降和熔体复合材料熔体流动指数的增加的影响归因于聚合物的深度降解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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