气相法制备高乙烯含量的高抗冲聚丙烯

doi:10.11949/j.issn.0438-1157.20151354

化工学报 ›› 2016, Vol. 67 ›› Issue (2): 667-671.DOI: 10.11949/j.issn.0438-1157.20151354

• 材料化学工程与纳米技术 • 上一篇下一篇

气相法制备高乙烯含量的高抗冲聚丙烯

笪文忠¹, 肖智贤², 徐宏彬¹, 屠宇侠², 梅利¹, 姚臻², 曹堃²

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

收稿日期:2015-08-25 修回日期:2015-12-20 出版日期:2016-02-05 发布日期:2016-02-05
通讯作者: 曹堃
基金资助:
国家高技术研究发展计划项目(2012AA040306)。

Preparation of high impact polypropylene with high ethylene content by gas phase process

DA Wenzhong¹, XIAO Zhixian², XU Hongbin¹, TU Yuxia², MEI Li¹, YAO Zhen², CAO Kun²

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

Received:2015-08-25 Revised:2015-12-20 Online:2016-02-05 Published:2016-02-05
Supported by:
supported by the National High Technology Research and Development Program of China (2012AA040306).

摘要/Abstract

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。

关键词: 高抗冲聚丙烯, 高乙烯含量, 防粘技术, 超细粉体

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℃.

Key words: high impact polypropylene, high ethylene content, antisticking technology, superfines

中图分类号:

TQ033

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.

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]. CIESC Journal, 2016, 67(2): 667-671.

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气相法制备高乙烯含量的高抗冲聚丙烯

Preparation of high impact polypropylene with high ethylene content by gas phase process

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