导电高分子复合材料压缩电阻松弛的弹簧黏壶模型
首发时间:2014-01-16
摘要:为定量研究可作为柔性压力传感器敏感材料的导电高分子复合材料压缩电阻松弛,本文对比分析了碳纳米管填充硅橡胶复合材料在压缩应力松弛过程中的电阻-时间特性和应力-时间特性。实验结果表明:压缩应力松弛过程中,复合材料电阻与应力都随时间呈指数衰减。以黏弹性理论为基础,仿照描述压缩应力松弛的弹簧黏壶模型,建立了压缩电阻松弛的弹簧黏壶模型,并给出了模型关键参数的物理含义。对这两种弹簧黏壶模型的对比分析结果表明:压缩电阻松弛时间常数和相对总衰减量均大于压缩应力松弛。
关键词: 仪器仪表材料 导电高分子复合材料 压缩电阻松弛 黏弹性
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Spring and dashpot model for compressive resistance relaxaiton of conductive polymer composite
Abstract:To study quantitatively the compressive resistance relaxation of conductive polymer composite which can be used as the sensitive material of flexible pressure sensor, the resistance-time property and the stress-time property of carbon nanotube filled silicone rubber composite during the compressive stress relaxation are analyzed comparatively. The experimental results show that the resistance of the composite and the stress decay exponentially over time. Based on the viscoelastic theory, a spring and dashpot model for the compressive resistance relaxation is established according to the spring and dashpot of compressive stress relaxation. The physical meanings for the key parameters of the models are given. The comparative analyses about the two kinds of models show that the relaxation times and the relative total derement for the resistance are more than those of the stress.
Keywords: Instrument materail Conductive polymer composite Compressive resistance relaxation Viscoelasticity
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