Abstract

Dilute solutions of nitrile-butadiene rubbers in toluene, methyl acetate, ethyl acetate, and butyl acetate are studied by viscometry. The rubbers are obtained using paraffinate emulsifiers and contain the same amounts of acrylonitrile and different molecular weights. The effect of rubber molecular weight and solvent nature on the intrinsic viscosity [η], viscometric Huggins k' and Kraemer k'' constants, the hydrodynamic volume of the macromolecule, and the root-mean-square end-to-end distance is estimated. Using these data, laws controlling changes in the thermodynamic quality of solvents with respect to nitrile-butadiene rubbers, which are confirmed by static light scattering measurements, are revealed.

中文翻译：

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丁酯溶液中丁腈橡胶的流体力学和构象性质

摘要

通过粘度测定法研究了丁腈橡胶在甲苯，乙酸甲酯，乙酸乙酯和乙酸丁酯中的稀溶液。橡胶是使用链烷酸酯乳化剂获得的，并且包含相同量的丙烯腈和不同的分子量。估算了橡胶分子量和溶剂性质对特性粘度[η]，粘度Huggins k '和Kraemer k ''常数，大分子的流体力学体积以及均方根端到端距离的影响。利用这些数据，揭示了控制溶剂相对于丁腈橡胶的热力学性质变化的规律，该规律已通过静态光散射测量得到了证实。