PTT“形状记忆”织物的低温动态力学性能

Low Temperature Dynamic Mechanical Properties of PTT Shape Memory Fabric

利用动态力学热分析仪测试聚对苯二甲酸丙二醇酯(PTT)"形状记忆"织物及其对比样聚对苯二甲酸乙二醇酯(PET)"仿记忆"织物、尼龙织物的低温动态力学性能,进而对织物的弹性模量及损耗因子进行分析.研究结果表明,在-130～200℃范围内,PTT"形状记忆"织物的经、纬向弹性模量较小,且随着温度的降低呈现小幅度增大,织物的经、纬向低温转变峰温度分别约为-30～-20℃和-35～-25℃;PET"仿记忆"织物和尼龙织物的经、纬向弹性模量较大,且随着温度的降低呈现相对大幅度增大,PET"仿记忆"织物的经、纬向低温转变峰温度分别约为-35～-25℃和-30～-10℃,尼龙织物的经、纬向低温转变峰温度分别约为-15～-5℃和-55～-45℃.研究结果为PTT"形状记忆"织物在高寒领域的应用提供参考.

Low temperature dynamic mechanical properties of poly（trimethylene terephthalate） （PTT） shape memory fabric and contrast samples of poly（ethylene terephthalate）（PET） imitate shape memory fabric and nylon fabric were tested by dynamic mechanical thermal analysis. Then modulus of elasticity and loss factor of these fabrics were analyzed. The research results indicated that from -130 to 200℃, modulus of elasticity in warp and weft direction of PTT shape memory fabric were small, they showed small range increased as the temperature reduced, low temperature transition peak in warp and weft direction were from -30 to -20℃ and from -35 to -25℃ respectively; modulus of elasticity in warp and weft direction of PET imitate shape memory fabric and nylon fabric were bigger, they showed relatively large range increased as the temperature reduced, low temperature transition peak in warp and weft direction of PET imitate shape memory fabric were from -35 to -25℃ and from -30 to -10℃ respectively, of nylon fabric were from -15 to -5℃ and from -55 to -45℃ respectively. The research results provided references for PTT shape memory fabric applied to cold alpine zone.