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首页> 外文期刊>Polymers for advanced technologies >The interfacial enhancement of LLDPE/ whisker composites via interfacial crystallization
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The interfacial enhancement of LLDPE/ whisker composites via interfacial crystallization

机译：通过界面结晶来增强LLDPE /晶须复合材料的界面

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摘要

Interfacial interaction plays a key role in the preparation of high performance polymer composites. In this work, in order to explore the possibility to enhance the interfacial interaction via interfacial crystallization of polymer matrix onto the filler surface, interfacial crystallization structure and mechanical properties of linear low density polyethylene (LLDPE)/whisker composites were investigated. The composites were firstly prepared by melt compounding, followed by processing in both traditional and dynamic injection molding. DSC, WAXD, SEM were used to characterize the interfacial crystallization structure. And the mechanical properties were measured by tensile testing. An imperfect shish-calabash structure, with whisker served as shish, and irregular LLDPE spherulite as imperfect calabash, was formed during common injection molding processing. Such a structure was considered as the main reason for the strong interfacial adhesion and the obviously improved tensile strength and modulus. Furthermore, introducing shear could cause the formation of relatively perfect shish-calabash structure, leading to the stronger interfacial adhesion.
机译：界面相互作用在高性能聚合物复合材料的制备中起关键作用。在这项工作中，为了探索通过聚合物基体在填料表面上的界面结晶来增强界面相互作用的可能性，研究了线性低密度聚乙烯（LLDPE）/晶须复合物的界面结晶结构和力学性能。首先通过熔融混合制备复合材料，然后在传统注塑和动态注塑中进行加工。使用DSC，WAXD，SEM表征界面结晶结构。并通过拉伸试验测量机械性能。在普通的注模加工过程中，形成了不理想的带糊状的葫芦结构，以晶须为糊状，不规则的LLDPE球晶为不完全的瓢状。这种结构被认为是产生强界面粘合力以及抗张强度和模量明显提高的主要原因。此外，引入剪切可能会导致形成相对理想的碎屑-卡拉胶结构，从而导致更强的界面附着力。

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