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首页> 外文期刊>Journal of Applied Polymer Science >Morphology and properties of highly talc- and CaCO_3-filled poly(vinyl alcohol) composites prepared by melt processing
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Morphology and properties of highly talc- and CaCO_3-filled poly(vinyl alcohol) composites prepared by melt processing

机译：熔融加工制备高滑石粉和CaCO_3填充的聚乙烯醇复合材料的形貌和性能

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摘要

Highly filled poly(vinyl alcohol) (PVA) composites, PVA/talc and PVA/CaCO_3, were successfully prepared through melt-processing technology without use of coupling agents or compatibilizers. Morphology analysis showed that both of the two fillers well dispersed in PVA matrix. Differently, the flaky talc obviously oriented, while the particulate CaCO _3 was randomly scattered in PVA matrix. Rheological analysis showed that the two filled systems exhibited a common shear-thinning phenomenon, confirming their pseudoplastic nature. Compared with the particulate CaCO _3, the flaky talc exhibited a closer arrangement in the composite, resulting in a lower threshold filler content to form the network structure. Therefore, PVA/talc composite showed higher melt viscosity and lower extrudate-swell ratio. The orientation of the flaky talc particles in the system also resulted in the higher melting and heat-deflection temperatures, as well as a greater reinforcement effect on the composite, but a lower elongation at break.
机译：通过熔融加工技术成功制备了高度填充的聚乙烯醇（PVA）复合材料PVA /滑石粉和PVA / CaCO_3，无需使用偶联剂或增容剂。形态分析表明两种填料都很好地分散在PVA基质中。不同的是，片状滑石明显取向，而颗粒状的CaCO_3随机散布在PVA基质中。流变分析表明，两个填充体系表现出共同的剪切稀化现象，证实了它们的假塑性性质。与颗粒状CaCO_3相比，片状滑石粉在复合物中表现出更紧密的排列，从而导致较低的阈值填料含量形成网络结构。因此，PVA /滑石复合材料显示出较高的熔体粘度和较低的挤出物-溶胀比。片状滑石颗粒在体系中的取向还导致较高的熔融和热变形温度，以及对复合材料的增强作用，但断裂伸长率较低。

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