| 聚丙烯／无规共聚聚丙烯共混物的流变行为与力学性能研究 |
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| 引用本文： | 王东 高俊刚 李书润 王红. 聚丙烯／无规共聚聚丙烯共混物的流变行为与力学性能研究[J]. 中国塑料, 2003, 17(8): 19-23 |
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| 作者姓名： | 王东 高俊刚 李书润 王红 |
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| 作者单位： | [1]河北大学化学与环境科学学院，河北保定071002 [2]河北保定石油化工厂，河北保定071002 |
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| 基金项目： | 河北省自然科学基金 (批准号 :2 0 10 6 8)，河北省教育厅科研基金 (批准号 :2 0 0 0 10 5 )资助 |
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| 摘 要： | 以毛细管流变仪研究了聚丙烯(PP)／无规共聚聚丙烯(PP-R)共混物熔体的流变行为。讨论了共混物的组成、剪切应力和剪切速率以及温度对熔体流变行为、熔体粘度的影响。测定了不同配比共混物熔体的非牛顿指数和膨胀比。结果表明：PP／PP-R共混物熔体属假塑性流体，其熔体粘度随PP-R含量的增加而迅速增大。力学性能测试结果表明，PP-R对PP有很好的增韧改性作用。另外，也用偏光显微镜研究了PP-R对共混物结晶形态的影响。
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| 关 键 词： | 聚丙烯 无规共聚聚丙烯 流变行为 力学性能 |
Rheological Behavior and Mechanical Properties of PP/PP-R Blends |
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| WANG Dong ,GAO Jun-gang ,LI Shu-run ,WANG Hong. Rheological Behavior and Mechanical Properties of PP/PP-R Blends[J]. China Plastics, 2003, 17(8): 19-23 |
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| Authors: | WANG Dong GAO Jun-gang LI Shu-run WANG Hong |
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| Affiliation: | WANG Dong 1,GAO Jun-gang 1*,LI Shu-run 1,WANG Hong 2 |
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| Abstract: | Rheological behavior of PP/PP-R blends was studied with a capillary rheometer. Influences of composition of the blends, shear stress , shearing rate and temperature on the rheological behavior and viscosity of the melt were discussed. Non-Newtonian index and die swell ratio of the melt with various composition of the blends were measured. Results showed that PP/PP-R blends were pseudoplastic fluid. The melt viscosity promptly increased with increasing PP-R contents. Mechanical property showed that PP-R had good toughening effect on PP. Influences of PP-R on crystallization morphology of the blends were also studied by Polarized Optical Microgrophy. |
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| Keywords: | polypropylene random copolymerized polypropylene rheological behavior mechanical property |
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