中国塑料 ›› 2022, Vol. 36 ›› Issue (8): 110-114.DOI: 10.19491/j.issn.1001-9278.2022.08.018

• 加工与应用 • 上一篇    下一篇

微纳层叠天然橡胶/聚丙烯两相挤出的数值模拟研究

赵鸿敬1(), 朱江2   

  1. 1.航天材料及工艺研究所,北京 100076
    2.四川航天烽火伺服控制技术有限公司,成都 611130
  • 收稿日期:2022-04-27 出版日期:2022-08-26 发布日期:2022-08-22
  • 作者简介:赵鸿敬(1975—),男,高级工程师,从事特种工程塑料、胶粘剂、橡胶密封和阻尼减振材料及其应用研究,13641205392@163.com

Study on numerical simulation of two⁃phase extrusion for micro/nano⁃laminated natural rubber/polypropylene

ZHAO Hongjing1(), ZHU Jiang2   

  1. 1.Aerospace Research Institute of Materials & Processing Technology,Beijing 100076,China
    2.Sichuan Aerospace Fenghuo Servo Control Technology Co,Ltd,Chengdu 611130,China
  • Received:2022-04-27 Online:2022-08-26 Published:2022-08-22

摘要:

为了确保天然橡胶/聚丙烯(NR/PP)通过微纳层叠挤出的厚度均匀,建立了三维模型层叠流道,根据流变测试结果拟合材料黏度,并对NR/PP三维等温黏弹性流动进行了数值模拟。结果表明,当2种物料的入口流动速率相同时,流道出口处两相速度有突变,不同流道之间速度差较大,两相黏度分界不明晰,界面出现一定程度的相互渗入;调整两相的入口流动速率后,速度过渡平稳,不同流道间速度差减小,黏度分界规整,界面无偏移现象。

关键词: 层叠流道, 数值模拟, 天然橡胶, 聚丙烯

Abstract:

Aiming to ensure the uniform thickness of natural rubber (NR)/polypropylene (PP) compounds extruded by micro/nano lamination, a three?dimensional model laminated flow channel was established. The material viscosity was fitted according to the rheological test results, and then the three?dimensional isothermal viscoelastic flow of NR/PP compounds was numerically simulated. The results showed that the two?phase velocity at the outlet has a drastic change at the same inlet flow rates of the two materials. The velocity difference between different flow channels was large, and the viscosity boundary of two?phase was not clear. Therefore, there was a certain degree of mutual infiltration at the interface. After adjusting the inlet rates of the two phases, the velocity transition tended to be stable with a reduction in the velocity difference between different channels. The viscosity boundary of two?phase was regular without the offset phenomenon.

Key words: laminated flow channel, numerical simulation, natural rubber, polypropylene

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