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Morphological and rheological properties of zirconia filled polyethylene
Polymer ( IF 4.6 ) Pub Date : 2017-11-03 , DOI: 10.1016/j.polymer.2017.10.068
M.-C. Auscher , R. Fulchiron , T. Périé , P. Cassagnau

In the framework of a comprehensive study of the ceramic feedstocks in molten conditions, the viscoelastic behavior of zirconia-filled polymers has been studied over a broad span of particle concentrations (from 0 to 42 vol% i.e., from 0 to 82 wt%). This study shows that the effect of stearic acid on the melt rheology depends on the filler content, suggesting that different dispersion mechanisms of the fatty acid are involved and prevail over others, depending on the solid concentration. It is shown, for instance, that stearic acid lowers the percolation threshold and modifies the dispersion state. For the first time, the existence of two main regimes in terms of concentration ranges with different network structures is highlighted. The dispersion contributions are discussed for each regime by coupling SEM dispersion characterization, dynamic and steady rheological measurements.



中文翻译:

氧化锆填充聚乙烯的形态和流变性能

在熔融条件下的陶瓷原料的全面研究的框架下,氧化锆-填充的聚合物的粘弹性行为已被研究过的颗粒浓度的宽范围(从0到42体积%从0到82wt%)。这项研究表明,硬脂酸对熔体流变学的影响取决于填料含量,这表明,取决于固体浓度,脂肪酸的不同分散机制会参与其中并占据主导地位。例如,显示硬脂酸降低了渗滤阈值并改变了分散状态。首次着重强调了存在两种主要机制的网络范围不同的集中范围。通过结合SEM色散表征,动态和稳定的流变学测量,讨论了每种体系的色散贡献。

更新日期:2017-11-03
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