| 在剪切应力场下少量HMWPE诱导HDPE的微观结构 |
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| 引用本文： | 卫进,陈占春,寇子明,邓聪,高雪琴,申开智. 在剪切应力场下少量HMWPE诱导HDPE的微观结构[J]. 高分子材料科学与工程, 2011, 0(5): 32-34,38 |
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| 作者姓名： | 卫进 陈占春 寇子明 邓聪 高雪琴 申开智 |
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| 作者单位： | 太原理工大学机械工程学院;四川大学高分子科学与工程学院高分子材料工程国家重点实验室 |
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| 基金项目： | 国家自然科学基金资助项目(50527301,10590351) |
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| 摘 要： | 采用少量高分子量聚乙烯(HMWPE)在动态保压剪切应力场中诱导中等分子量聚乙烯(MMWPE),在这种双重诱导的作用下得到了性能良好的聚乙烯材料,其平行于流动方向的拉伸强度和冲击强度达到了71.17 MPa和75.79 kJ/m<'2>,分别提高了209.4%和252.8%;通过差示扫描量热(DSC),X射线衍射(WAX...
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| 关 键 词： | 高分子量聚乙烯 诱导 自增强 动态保压 微观结构 |
Morphologies of HDPE Induced by Small Amount of High Molecular Weight Polyolefin and Shear Stress Produced by Dynamic Packing Injection Molding |
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| Jin Wei,Zhanchun Chen,Ziming Kou,Cong Deng,Xueqin Gao,Kaizhi Shen. Morphologies of HDPE Induced by Small Amount of High Molecular Weight Polyolefin and Shear Stress Produced by Dynamic Packing Injection Molding[J]. Polymer Materials Science & Engineering, 2011, 0(5): 32-34,38 |
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| Authors: | Jin Wei Zhanchun Chen Ziming Kou Cong Deng Xueqin Gao Kaizhi Shen |
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| Affiliation: | 1.College of Mechanical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;2.College of Polymer Science and Engineering,the State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China) |
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| Abstract: | High density polyethylene was induced by small amount of high-molecular-weight polyethylene(HMWPE) and shear-stress produced by dynamic packing injection molding.The experiment substantiates that the further improvement of tensile strength along the flow direction of high-density polyethylene(HDPE)/HMWPE samples is achieved and the value is 71.17 MPa,whereas the impact strength still substantially exceeds that of conventional molding and the value is 75.79 kJ/m2.For further to discuss the mechanism of this high strength and toughness,the obtained samples were characterized via differential scanning calorimetry(DSC),wide angle X-ray diffraction(WAXD) and scanning electron microscope(SEM).The experimental results show that the shish-kebab structure which is composed of stretched chains(shish) and lamellae(kebab) is seen in the oriented region of samples.The degree of crystallinity in shear region which is approved by DSC and SEM is 65.7%,at the same time,it can been seen the net shish-kebab by SEM. |
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| Keywords: | high-molecular-weight polyethylene induce self-reinforcement dynamic packing injection molding microcosmic structure |
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