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为研究丁基硝氧乙基硝胺(NENA)对硝化纤维素(NC)的溶塑作用,用动态流变学方法和单向拉伸实验分别研究了NENA和NG(硝化甘油)溶塑NC的完整历程及其溶塑产物的力学性能,并通过分子动力学模拟揭示了溶塑作用的微观信息。结果表明,NENA在NC中的扩散系数(2.12×10-10m2/s)比NG(1.39×10-10m2/s)高;与NG相比,NENA加快了NC的溶塑速率,增加了体系的自由体积,增强了NC分子链内部的作用力,增大了溶塑产物的最大伸长率和最大拉伸强度。
In order to study the plasticizing effect of butylnitrooxyethylnitramine (NENA) on nitrocellulose (NC), the dynamic rheological method and uniaxial tensile test were used to study the effects of NENA and NG (nitroglycerin) And the mechanical properties of the sol-gel products. The molecular dynamics simulations reveal the microscopic information of the solvating effect. The results showed that the diffusion coefficient (2.12 × 10-10m2 / s) of NENA in NC was higher than that of NG (1.39 × 10-10m2 / s). Compared with NG, NENA accelerated the dissolution rate of NC and increased the The free volume increases the force inside the NC molecular chain and increases the maximum elongation and the maximum tensile strength of the melt-molded product.