中国塑料 ›› 2022, Vol. 36 ›› Issue (4): 89-94.DOI: 10.19491/j.issn.1001-9278.2022.04.014

• 加工与应用 • 上一篇    下一篇

高弹态耐冲击聚苯乙烯本构模型分析

陈腾飞, 莫琪棉, 张世勋, 曹伟()   

  1. 郑州大学橡塑模具国家工程研究中心,郑州 450002
  • 收稿日期:2021-10-04 出版日期:2022-04-26 发布日期:2022-04-24
  • 通讯作者: 曹伟(1965—),男,教授,主要从事聚合物加工过程数值模拟研究,wcao@zzu.edu.cn
    E-mail:wcao@zzu.edu.cn
  • 基金资助:
    国家自然科学基金项目(11672271)

Analysis for constitutive models of high impact polystyrene in rubber⁃like state

CHEN Tengfei, MO Qimian, ZHANG Shixun, CAO Wei()   

  1. National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,China
  • Received:2021-10-04 Online:2022-04-26 Published:2022-04-24
  • Contact: CAO Wei E-mail:wcao@zzu.edu.cn

摘要:

应用旋转流变仪开展高抗冲聚苯乙烯(PS?HI)在不同温度下的流变实验,分析常用黏性模型描述高弹态PS?HI的精度,并基于黏弹性Phan?Thien Tanner (PTT)模型建立PS?HI流动理论模型和数值算法,研究高弹态PS?HI的黏弹性特征。理论分析和实验结果表明,黏性模型中Cross模型和Carreau?Yasuda模型较好地描述了PS?HI的流变特征,而黏弹性PTT模型的精度明显高于黏性模型,显示高弹态PS?HI具有一定的弹性特征。

关键词: 本构模型, 黏度, 黏弹性, 松弛时间谱

Abstract:

A series of rotary rheological experiments were conducted for high?impact polystyrene (PS?HI) under different temperatures to analyze the precision of conventional obtained from usually used viscous models. Then, a flow theory based on Phan?Thien Tanner (PTT) model was established and the corresponding algorithm was constructed to study the viscoelastic characteristics of rubber?like state PS?HI. Both theoretical and numerical results indicated that the Cross and Carreau?Yasuda models could describe the rheological characteristics of PS?HI better compared to other viscous models. The viscoelastic PTT model exhibited a significant improvement in precision, indicating that PS?HI presented some elasticity in the rubber?like state.

Key words: constitutive model, viscosity, viscoelastic, relaxation time spectrum

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