On the fracture characteristics of impact tested high density polyethylene-calcium carbonate nanocomposites

C. Deshmane; Q. Yuan; R.D.K. Misra

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On the fracture characteristics of impact tested high density polyethylene-calcium carbonate nanocomposites

机译：冲击试验高密度聚乙烯碳酸钙纳米复合材料的断裂特性

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The mechanical response of calcium carbonate-reinforced high density polyethylene nanocomposite is investigated and the behavior compared with the unreinforced polyethylene processed under similar conditions. The reinforcement of high density polyethylene with nanocalcium carbonate retains adequately high strength in the temperature range of -40 to +20℃. The positive influence of reinforcement on the impact strength is reflected in the fracture characteristics and is attributed predominantly to the nucleating effect of calcium carbonate in decreasing the spherulite size. The achievement of high impact strength is accompanied by increase in modulus and no loss in yield strength. The reinforcement of neat high density polyethylene (HDPE) with nanocalcium carbonate alters the deformation micromechanism from crazing-tearing in HDPE to fibrillated fracture in polymer nanocomposite.

机译：研究了碳酸钙增强的高密度聚乙烯纳米复合材料的机械响应，并将其行为与在类似条件下加工的未增强聚乙烯进行了比较。纳米碳酸钙对高密度聚乙烯的增强在-40至+ 20℃的温度范围内保持足够高的强度。增强对冲击强度的积极影响反映在断裂特性上，并且主要归因于碳酸钙在减小球晶尺寸方面的成核作用。高冲击强度的实现伴随着模量的增加而屈服强度没有损失。纳米碳酸钙增强纯高密度聚乙烯（HDPE），改变了变形微观机制，从HDPE中的裂纹撕裂到聚合物纳米复合材料中的原纤化断裂。

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《Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing》 |2007年第4期|p.592-601|共10页
作者
C. Deshmane; Q. Yuan; R.D.K. Misra;
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Center for Structural and Functional Materials, University of Louisiana at Lafayette, P.O. Box 44130, Lafayette, LA 70504-4130, USA;

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原文格式 PDF
正文语种 eng
中图分类工程材料学;
关键词
plastic deformation; microstructure; polymer nanocomposites;

机译：塑性变形;微观结构;聚合物纳米复合材料;

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On the fracture characteristics of impact tested high density polyethylene-calcium carbonate nanocomposites

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