Effect of SiO2 nanoparticle on thermal and tensile behavior of nylon-6
Effect of SiO2 nanoparticle on thermal and tensile behavior of nylon-6
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DOI：
10.1016/j.msea.2006.05.124
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发表时间：
2006-08-15
期刊：
影响因子：
6.4
通讯作者：
Jeelani, Shaik
中科院分区：
文献类型：
--
作者：
Hasan, Mohammad M.;Zhou, Yuanxin;Jeelani, Shaik
研究了纳米SiO2对尼龙6热性能和力学性能的影响。首先，制备具有0、1和2重量%的纳米颗粒。通过机械方法将负载物与尼龙-6干混，并使用单螺杆挤出机挤出成长丝。然后，在0.02-2 min（-1）的应变速率范围内对单丝进行拉伸试验。实验结果表明，纯尼龙和纳米尼龙均为应变率强化材料。拉伸模量、屈服强度和极限拉伸强度（UTS）均随应变速率的增加而增加。实验结果还表明，纳米粒子注入尼龙-6可以提高拉伸模量，屈服强度，硬化模量，和UTS。在2 wt.%的聚乙烯中观察到拉伸模量提高45%，UTS提高26%。系统与纯尼龙-6相比。同时，用TGA和DSC对纯尼龙6和纳米尼龙6的热性能进行了表征。TGA热分析图已经显示纳米颗粒注入的系统更热稳定。DSC研究还表明，对于纳米相体系，T有适度的增加，而熔融吸热没有明显的偏移。最后，根据拉伸实验结果，建立了描述纯尼龙6和纳米尼龙6应变率敏感行为的非线性本构方程。(c)2006 Elsevier B. V.保留所有权利。
The present study investigates the effect of SiO2 nanoparticle on the thermal and mechanical properties of nylon-6. Firstly, nanoparticles with 0, 1, and 2 wt.% loading were dry-mixed with nylon-6 by mechanical means and extruded into filaments using a single screw extruder. Then, tensile tests were performed on the single filament at the strain rate range of 0.02-2 min(-1). Experimental results show that both neat and nanophased nylon-6 were strain rate strengthening materials. The tensile modulus, yield strength, and ultimate tensile strength (UTS) all increased with increasing strain rate. Experimental results also show that infusing nanoparticles into nylon-6 can increase tensile modulus, yield strength, hardening modulus, and UTS. Forty-five percent enhancement in tensile modulus and 26% enhancement in UTS were observed in the 2 wt.% system as compared with neat nylon-6. At the same time, thermal properties of neat and nanophased nylon-6 were characterized by TGA and DSC. TGA thermograms have shown that the nanoparticle infused systems are more thermally stable. DSC studies also have indicated that there is a moderate increase in T, without a distinct shift in the melting endotherm for the nanophased systems. At last, based on the tensile test results, a nonlinear constitutive equation was developed to describe strain rate sensitive behavior of neat and nanophased nylon-6. (c) 2006 Elsevier B.V. All rights reserved.