共查询到19条相似文献,搜索用时 54 毫秒
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纳米CaCO3增强增韧HDPE复合材料的研究 总被引:39,自引:4,他引:39
较深入地开展了纳米CoCO3对HDPE的增强增韧研究。结果表明:(1)纳米CaCO3在未经表面处理的情况下,与HDPE仍具有一定的粘接作用力,对HDPE有增强增韧作用。(2)现有表现处理睦纳米CaCO3与HDPE相界面作用扔改变不大,但能够促进CaCO3粒子在基体中的均匀分散,大大地减少了CaCO3增强增韧HDPE的用量。表面处理后的CaCO3在含量仅为4%~6%时,复合材料冲击强度即可提高1倍, 相似文献
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纳米级CaCO3填充LDPE复合材料的研究 总被引:3,自引:0,他引:3
研究了高分子表面处理剂处理纳米CaCO3填充LDPE复合膜的力学性能。结果表明,由于纳米粒子的表面效应以及高分子表面处理剂的作用,加入少量的纳米粒子,复合体系的拉伸强度、断裂伸长率和直角撕裂强度均有不同程度的增加。 相似文献
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纳米级CaCO3填弃PVC/CPE复合材料研究 总被引:30,自引:1,他引:30
探讨了内米级CaCO3粒子增韧增强PVC/CPE基理,研究了纳米级CaCO3与轻质CaCO3用量对PVC/CPE体系力学性能的影响。结果表明:纳粘级CaCO3用量为5%~12%时体产伸强主菩工都有明显提高,起到了增韧、增强的双重效果。轻质CaCO3填充PVC/CPE体系基本未见地韧效果,同时,随着轻质CaCO3用量的增加,体系的拉伸强度和断裂伸长率明显降低。 相似文献
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碳酸钙填充HDPE泡沫塑料 总被引:1,自引:0,他引:1
采用轻质CaCO3和超细CaCO3填充改性注射极HDPE结构泡沫塑料,探讨了填充量对泡沫塑料性能的影响,并考察了经表面处理的CaCO3对填充效果的影响。 相似文献
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大分子偶联剂对HDPE/纳米CaCO3复合材料性能的影响 总被引:31,自引:4,他引:31
为进一步改善HDPE/纳米CaCO3体系的性能,采用一种大分子偶联剂(聚合物型分散剂)对纳米CaCO3进行表面处理,处理使填充体系有良好的综合性能,且断裂伸长率显著提高,加工性能也得到极大改善。 相似文献
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本文研究了非发泡高填充CaCO2聚乙烯复合材料的组成,性能及其影响因素,介绍了高填充CaCO3的聚乙烯复合材料中各组份对复合材料性能的影响和作用。 相似文献
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通过熔融接枝的方法制备了高分子型界面相容剂HDPE-g-MAH并将其应用于HDPE/CaCO3填充体系;考查了HDPE-g-MAH对HDPE/CaCO3俭朴 间的界面粘连,是使材料实现强韧化的关键组分。 相似文献
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本文研究了高分子包覆剂处理纳米CaCO3填充LDPE复合膜的力学性能。结果表明.借助纳米粒子的表面效应以及高分子包疆剂的作用。加入少量的纳米粒子。复合体系的拉伸强度、断裂伸长率和直角撕裂强度均有不同程度的增加。 相似文献
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PP/纳米级CaCO3复合材料性能研究 总被引:71,自引:6,他引:65
研究了纳米级CaCO3对PP的增强增韧作用,结果表明,纳米级CaCO3对PP的力学性能有显著的改善作用,而且对PP的结晶有明显的异相成核作用。 相似文献
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通过制备不同含量的微米级和纳米级碳酸钙(CaCO3)填充的高密度聚乙烯(HDPE)片材制品,对其力学性能进行分析。研究了微米级和纳米级CaCO3对HDPECaCO3复合材料片材制品的力学性能的影响规律,并对此影响规律进行了合理的解释。 相似文献
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HDPE/POE/CaCO3三元体系薄膜研究 总被引:1,自引:1,他引:1
采用聚烯烃弹性体(POE)和重质碳酸钙对HDPE薄膜进行改性,研究了POE和重质碳酸钙的用量对共混体系薄膜力学性能、流变性能的影响。结果表明,POE的加入,使HDPE/POE薄膜的单位落镖冲击破损质量增加,而拉伸强度则有所下降。当POE的质量分数为10%时,薄膜的单位落镖冲击破损质量提高了51.1%,但薄膜的拉伸强度下降了20.5%。在HDPE/POE/CaC03体系中,当POE、重质碳酸钙的质量分数分别为10%和5%时,薄膜的单位落镖冲击强度比纯HDPE提高95.6%,且拉伸强度不降低。 相似文献
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研究了高密度聚乙烯(HDPE)/线性低密度聚乙烯(LLDPE)共混物及其碳酸钙(CaCO3)填充体系的注射成型收缩率,分别用示差扫描量热仪(DSC)和AR2000高级流变仪分析测定了共混物的结晶度和熔体黏度,并探讨了不同配比下共混物结晶度和熔体黏度与成型收缩率的关系。结果表明,在加工条件不变的情况下,HDPE/LLDPE共混物成型收缩率受结晶度和熔体黏度的显著影响。随LLDPE用量的增加,收缩率的变化明显分为三个阶段,先迅速增大,然后变化减缓,最后又逐渐减小。加入少量铝酸酯活化的CaCO3可以显著降低共混物的成型收缩率。 相似文献
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To improve the mechanical properties and structure of HDPE/CaCO3 composites, a type of modifier, consisting mainly of carboxylated polyethylene (CPE), and a type of CaCO3 grafted with acrylamide (CaCO3(SINGLE BOND)A) were used. The carboxyl group content of CPE was from 1 to 10%. The amide group content on the surface of the modified CaCO3 was from 0.2 to 1.8%. The interfacial structure and interaction of ternary blends of HDPE, CPE, and CaCO3(SINGLE BOND)A were studied. The results indicate that the higher the amide group content and the carboxyl group content, the higher the tensile and impact strength. This behavior has been attributed to a series of chemical and physico-chemical interactions taking place between the two components during the blending process which were confirmed by FTIR and extraction experiments. The improvement of interfacial adhesion by the CPE and CaCO3(SINGLE BOND)A was also clearly revealed in the SEM of the fracture surface. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 1275–1281, 1997 相似文献
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In this study, a series of high‐density polyethylene and micro/nanocalcium carbonate polymer composites (HDPE/CaCO3 nanocomposites) were prepared via melt blend technique using a twin screw extruder. Nanocomposite samples were prepared via injection molding for further testing. The effect of % loading of CaCO3 on mechanical and fracture toughness of these composites has been investigated in details. The effect of precrack length variation on the fracture toughness of the composite samples was evaluated, and the morphology of the fractured samples was also observed using scanning electron microscopy (SEM). It was found that increasing the % of CaCO3 and precrack length decreased the fracture toughness. Fracture surface examination by SEM indicated that the diminished fracture properties in the composites were caused by the aglomerization of CaCO3 particles which acted as stress concentrators. A finite element analysis using ANSYS was also carried out to understand the effect of agglomeration size, interaction between the particles and crack tip length on the fracture properties of these composites. Finally, a schematic presentation of the envisioned fracture processes was proposed. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 相似文献