On the Creep Behavior of PA6/MMT Composites
尼龙6/蒙脱土复合材料蠕变行为研究

Fractional order derivative model and Prony series model were applied to study the creep behavior of viscoelastic material PA6/MMT due to the classical viscoelastic model can't satisfy the demands of analysis. PA6/MMT composite was prepared by in-situ polymerization method. Its creep experiments were performed at room temperature, then the experimental data of PA6/MMT composite creep behavior were analyzed by fractional order derivative model and the Prony series model. The determination of parameters in fractional order derivative standard-linear-like body model and Prony series model and the influence of parameters on creep curve were discussed. Result show that at the same stress level, the creep compliance is decreased with the increasing of the MMT content in composite; both above-mentioned models can describe the creep behavior of PA6/MMT composite and the Prony series model fit the creep experimental data more accurately. In addition, Prony series model can be used in finite element software conveniently.