Investigation on morphology and properties of melt compounded polyoxymethylene/carbon nanotube composites
Investigation on morphology and properties of melt compounded polyoxymethylene/carbon nanotube composites
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DOI：
10.1002/app.42639
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发表时间：
2015-10-20
影响因子：
3
通讯作者：
Schlarb, Alois K.
中科院分区：
文献类型：
--
作者：
Lin, Leyu;Schlarb, Alois K.
采用双螺杆挤出法制备了不同碳纳米管含量的聚甲醛纳米复合材料。研究了纳米复合材料的分散性能、热力学性能、蠕变和摩擦学性能。形态学研究表明，母粒稀释工艺显著改善了碳纳米管在聚甲醛基体中的分散质量，从而提高了碳纳米管的力学性能和抗蠕变性能。在短期实验数据的基础上，利用时间-温度叠加原理和Findley模型对其长期特性进行预测。利用时间-温度叠加原理，构造具有扩展时间尺度的主曲线，对短期实验数据进行水平位移。模拟结果证实，碳纳米管掺入聚合物基体后，即使在较长的时间尺度上，其抗蠕变性能也得到了增强。相比之下，加入碳纳米管后，聚甲醛的摩擦学性能明显下降。(c) 2015 Wiley期刊公司j:。变异较大。自然科学学报，2015,32(2):42639。
Polyoxymethylene nanocomposites containing different contents of carbon nanotubes were produced by a two-step melt compounding process using a twin-screw extruder. The dispersion quality, thermal and mechanical properties, and the creep as well as the tribological behaviors of the nanocomposites were investigated. Morphological investigations show that the masterbatch dilution process significantly improves the dispersion quality of carbon nanotubes within polyoxymethylene matrix, and as a consequence, enhanced mechanical properties and creep resistance are gained. Furthermore, to predict the long-term property based on the short-term experimental data, the time-temperature superposition principle and Findley model were used. Master curves with extended time scale are constructed using time-temperature superposition principle to horizontally shift the short-term experimental data. The simulated results confirm the reinforced creep resistance by incorporation of the carbon nanotubes into the polymer matrix even at extended long time scale. By contrast, the tribological performance of polyoxymethylene was remarkably impaired after adding carbon nanotubes. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42639.