高弹态耐冲击聚苯乙烯本构模型分析  

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

作　　者：陈腾飞 莫琪棉 张世勋[1] 曹伟[1] CHEN Tengfei;MO Qimian;ZHANG Shixun;CAO Wei(National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,China)

机构地区：[1]郑州大学橡塑模具国家工程研究中心,郑州450002

出　　处：《中国塑料》2022年第4期89-94,共6页China Plastics

基　　金：国家自然科学基金项目(11672271)。

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PSHI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。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.

关 键 词：本构模型 黏度 黏弹性 松弛时间谱 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]