热塑性聚氨酯/凹凸棒土纳米复合材料力学行为研究  

Study on the Mechanical Behavior of TPU /AT Nanocomposite

作　　者：廖云[1] 邓昌爱[1] 谭倪[1] 杜可杰[1] 

机构地区：[1]南华大学化学化工学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2013年第3期82-85,共4页Journal of University of South China：Science and Technology

摘　　要：通过溶液共混法制备了热塑性聚氨酯(TPU)/凹凸棒土(AT)纳米复合材料,研究AT的加入对TPU基体滞后、拉伸应力软化行为和松弛效应的影响.研究结果显示:随着AT的加入,纳米复合材料的滞后圈增大,拉伸应力软化效应增强,应力松弛速率和程度降低.TPU/AT体系分子链运动模型表明纳米复合材料力学行为的改变,可能是因为AT和TPU基体间形成了氢键,阻碍了分子链的运动.Thermoplastic polyurethane/attapulgite （ TPU/AT ） nanocomposites were pre-pared via solution blending process. The influence of hysteresis, stress softening behavior and stress relaxation effect of the AT on TPU matrix were investigated. The results demon-strated that with the addition of AT,the hysteresis loops were bigger,the stress softening effects were more obvious and the rate and degree of stress relaxation were reduced than those of pure TPU. The molecular motion model of TPU/AT system indicated that the influ-ence of mechanical behavior of AT on TPU matrix was possibly related with density of the hydrogen bond between AT-TPU,which may block the movement of chains.

关 键 词：热塑性聚氨酯 凹凸棒土 力学行为 

分 类 号：TQ330-1[化学工程—橡胶工业]