| 气相法制备高乙烯含量的高抗冲聚丙烯 |
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| 引用本文： | 笪文忠,肖智贤,徐宏彬,屠宇侠,梅利,姚臻,曹堃. 气相法制备高乙烯含量的高抗冲聚丙烯[J]. 化工学报, 2016, 67(2): 667-671. DOI: 10.11949/j.issn.0438-1157.20151354 |
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| 作者姓名： | 笪文忠 肖智贤 徐宏彬 屠宇侠 梅利 姚臻 曹堃 |
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| 作者单位： | 1.中国石化扬子石油化工有限公司南京研究院, 江苏 南京 210047;2.浙江大学化学工程与生物工程学院, 化学工程联合国家重点实验室, 浙江 杭州 310027 |
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| 基金项目： | 国家高技术研究发展计划项目(2012AA040306)。 |
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| 摘 要： | 反应器内合金化技术生产高抗冲聚丙烯(hiPP)过程中,目前工业上普遍采用加入低纯氮(LPN)的方式阻止聚丙烯颗粒表面生成乙丙橡胶的防粘策略,限制了乙烯含量的提高,使得其抗冲性能受到一定的制约。提出了一种在共聚气相釜中原位添加极少量(<0.1%)超细粉体的方法,通过局载化于聚丙烯颗粒表面,从而起到替代低纯氮的作用,并能通过物理阻隔的方式进一步防止颗粒间发黏聚并,成功将其运用于Hypol 工艺,制得高乙烯含量(>20%)且流动性良好的hiPP。同时,将产物与传统低纯氮体系的进行比较,其常温抗冲性能由36.44 kJ·m-2升至60.56 kJ·m-2,低温抗冲性能由14.78 kJ·m-2 升至35.12 kJ·m-2,体现出其优异的常温和低温抗冲性能。
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| 关 键 词： | 高抗冲聚丙烯 高乙烯含量 防粘技术 超细粉体 |
| 收稿时间： | 2015-08-25 |
| 修稿时间： | 2015-12-20 |
Preparation of high impact polypropylene with high ethylene content by gas phase process |
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| DA Wenzhong,XIAO Zhixian,XU Hongbin,TU Yuxia,MEI Li,YAO Zhen,CAO Kun. Preparation of high impact polypropylene with high ethylene content by gas phase process[J]. Journal of Chemical Industry and Engineering(China), 2016, 67(2): 667-671. DOI: 10.11949/j.issn.0438-1157.20151354 |
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| Authors: | DA Wenzhong XIAO Zhixian XU Hongbin TU Yuxia MEI Li YAO Zhen CAO Kun |
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| Affiliation: | 1.Nanjing Research Institute of SINOPEC Yangzi Petrochemical Company Limited, Nanjing 210047, Jiangsu, China;2.State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China |
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| Abstract: | In the production of high impact polypropylene (hiPP) by in-reactor processes, the ethylene content of hiPP was limited at a low level for the lack of a suitable antisticking method and that by now a deficient antisticking method with low purity nitrogen (LPN) was commonly adopted. A new antisticking method by in-situ adding tiny (<0.1%) superfines was adopted in Hypol process to produce hiPP with high ethylene content (>20%) and good flowability, showing the possibility to take the place of LPN method. Moreover, the comparison of the product with hiPP prepared by LPN method showed that the anti-impact performance rose from 36.44 kJ·m-2 to 60.56 kJ·m-2 at 23℃ and from 14.78 kJ·m-2 to 35.12 kJ·m-2 at -20℃, respectively. It was found that hiPP with high ethylene content presented excellent anti-impact performance at both 23℃ and -20℃. |
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| Keywords: | high impact polypropylene high ethylene content antisticking technology superfines |
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