| 双峰中密度聚乙烯/纳米碳酸钙复合材料的流变行为与力学性能 |
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| 引用本文： | 于茂赏,高俊刚,史大刚.双峰中密度聚乙烯/纳米碳酸钙复合材料的流变行为与力学性能[J].常熟理工学院学报,2004,18(2):29-33. |
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| 作者姓名： | 于茂赏 高俊刚 史大刚 |
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| 作者单位： | 1. 常熟高等专科学校化学系,江苏,常熟,215500
2. 河北大学化学与环境科学学院,河北,保定,071002 |
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| 基金项目： | 河北省自然科学基金
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河北省教育厅科研项目 |
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| 摘 要： | 研究了双峰中密度聚乙烯(BMDPE)与纳米碳酸钙不同配比复合物的流变行为与力学性能.讨论了复合物的组成、剪切应力和剪切速率以及温度对熔体粘度和膨胀比的影响,测定了不同配比熔体的非牛顿指数(n)、熔体流动速率(MFR)、粘流活化能以及习用屈服应力,断裂应力和断裂伸长率,用扫描电镜观察了纳米碳酸钙在复合材料中的分散情况.结果发现:纳米碳酸钙可以均匀地分散在BMDPE中,少量的纳米碳酸钙就可以明显提高材料的力学性能,在较高的剪切速率下还可以改善材料的加工性能.
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| 关 键 词： | 双峰中密度聚乙烯 纳米碳酸钙 复合材料 流变性 力学性能 |
| 文章编号： | 1008-2794(2004)02-0029-05 |
| 修稿时间： | 2003年9月2日 |
Rheological Behavior and Mechanical Properties of Melt of Bimodal Medium Density Polyethylene/Nano- CaCO3 Composite material |
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| YU Mao-shang,GAO Jun-gang,SHI Da-gang.Rheological Behavior and Mechanical Properties of Melt of Bimodal Medium Density Polyethylene/Nano- CaCO3 Composite material[J].Journal of Changshu Institute of Technology,2004,18(2):29-33. |
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| Authors: | YU Mao-shang GAO Jun-gang SHI Da-gang |
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| Institution: | YU Mao-shang~1,GAO Jun-gang~2,SHI Da-gang~2 |
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| Abstract: | Melts rheological behavior and Mechanical Properties of bimodal medium density polyethylene (BMDPE)/Nano-CaCO_3 composite material is studied.Influences of shear ratio,shear stress and different temperatures on swell ratio and melt apparent viscosity are discussed.Non-Newtonian index (n),melting flow rate (MFR),conventional yield stress,breaking stress and breaking extensibility of the composite material with different composition are measured.Distributed scatters in BMDPE / nano-CaCO_3 composite material is observed by SEM.Not only mechanical properties of BMDPE / Nano-CaCO_3 composite material is apparently improved,but also its processability can be mended in high shear ratio by nano-CaCO_3. |
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| Keywords: | bimodal medium density polyethylene nano-CaCO_3 composite materials rheological behavior mechanical property |
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