| 注射工艺条件对抗冲共聚聚丙烯力学性能的影响 |
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| 引用本文： | 曹瑾瑾,谢昕,雷自强,张立基.注射工艺条件对抗冲共聚聚丙烯力学性能的影响[J].塑料科技,2011,39(11). |
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| 作者姓名： | 曹瑾瑾 谢昕 雷自强 张立基 |
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| 作者单位： | 1. 西北师范大学化学化工学院生态环境相关高分子材料教育部重点实验室/甘肃省高分子材料重点实验室,甘肃兰州,730070
2. 中国石油天然气股份有限公司兰州化工研究中心,甘肃兰州,730060 |
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| 摘 要： | 用注塑成型方法制备了抗冲嵌段共聚聚丙(烯PP-B)试样,研究了工艺条件的改变对PP-B力学性能的影响。结果表明:注射速率和模具温度与PP-B弯曲强度、弯曲模量成正相关,而与冲击强度、拉伸强度的关系较为复杂;模具温度的升高有利于结晶度的提高,PP-B刚性上升,韧性下降;注射速率改变引起的剪切、拉伸流动使熔体发生取向流动,从而使沿取向方向上的强度升高,垂直取向方向上的强度降低;保压压力对PP-B性能的影响主要是通过熔体非晶部分在保压阶段的分子定向作用来实现的,随着保压时间的延长,PP-B塑件密度提高缺,陷减少拉,伸强度弯、曲模量呈增大趋势。
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| 关 键 词： | 抗冲共聚聚丙烯 注射工艺 力学性能 |
Effect of Processing Technology of Injection Molding on Mechanical Properties of Impact PP Copolymer |
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| Cao Jinjin,XieXin,Lei Ziqiang,Zhang Liji.Effect of Processing Technology of Injection Molding on Mechanical Properties of Impact PP Copolymer[J].Plastics Science and Technology,2011,39(11). |
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| Authors: | Cao Jinjin XieXin Lei Ziqiang Zhang Liji |
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| Affiliation: | Cao Jinjin1,Xie Xin2,Lei Ziqiang1,Zhang Liji2 1 Key Laboratory of Polymer Materials of Gansu Province/Key Laboratory of Eco-environment-related Polymer Materials of Ministry of Education,College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China 2 Lanzhou Petrochemical Research Center,PetroChina,Lanzhou 730060,China |
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| Abstract: | The impact polypropylene block copolymer(PP-B) samples were prepared by injection molding.The effects of processing parameters of injection molding on mechanical properties of PP-B were studied.The results show that both injection rate and mold temperature have positive correlation with the flexural strength and flexural modulus,but the relationship between injection rate,mold temperature and impact strength,tensile strength is complicated;with the increase of mold temperature,the crystallinity of PP-B incr... |
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| Keywords: | Impact polypropylene copolymer Injection molding technology Mechanical properties |
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