| 茂金属中密度聚乙烯的性能及加工应用 |
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| 引用本文： | 李朋朋,梁天珍,樊洁,邵月君. 茂金属中密度聚乙烯的性能及加工应用[J]. 工程塑料应用, 2010, 38(6) |
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| 作者姓名： | 李朋朋 梁天珍 樊洁 邵月君 |
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| 作者单位： | 中国石油石油化工研究院兰州化工研究中心,兰州,730060 |
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| 基金项目： | 中国石油石油化工研究院创新基金项目 |
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| 摘 要： | 对茂金属中密度聚乙烯(MDPE)的结构与性能进行表征,并对其挤出和吹膜加工应用进行分析.结果表明,小试聚合得到的MDPE具有较窄的相对分子质量分布、较低的支化度,且拉伸屈服强度、弯曲强度显著高于线性低密度聚乙烯(LLDPE),冲击强度特别是低温冲击强度高于高密度聚乙烯(HDPE);MDPE属于假塑性流体,在低温时容易出现不稳定流动现象,在高剪切速率下可以观察到粘度和压力的异常反转现象;可在现有加工LLDPE的设备上顺利进行挤出、吹膜加工,且得到的薄膜在纵横向具有均匀性屈服强度、撕裂强度方面优于进口高性能LLDPE产品.
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| 关 键 词： | 茂金属中密度聚乙烯 流变行为 挤出加工 吹膜 结构与性能 |
PROPERTIES AND APPLICATION OF METALLOCENE MEDIUM DENSITY POLYETHYLENE |
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| Li Pengpeng,Liang Tianzhen,Fan Jie,Shao Yuejun. PROPERTIES AND APPLICATION OF METALLOCENE MEDIUM DENSITY POLYETHYLENE[J]. Engineering Plastics Application, 2010, 38(6) |
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| Authors: | Li Pengpeng Liang Tianzhen Fan Jie Shao Yuejun |
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| Affiliation: | Li Pengpeng,Liang Tianzhen,Fan Jie,Shao Yuejun (Lanzhou Petrochemical Research Center,PetroChina,Lanzhou 730060,China) |
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| Abstract: | The structure and properties of metallocene medium density polyethylene(MDPE) was characterized and process in extrusion and film blowing were investigated. Results showed that the MDPE had narrow molecular weight distribution, low branch degree, and its yield strength in tensile, bend strength were distinctly higher than LLDPE, its impact strength was higher than HDPE, especially at low temperature. The MDPE belongs to pseudoplastic fluid, and unstable flow at low temperature was observed. The abnormal rev... |
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| Keywords: | metallocene medium density polyethylene rheological behavior extrusion processing film blowing structure and property |
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