【摘要】 本文在较宽范围内,定量地研究了分子量对炭黑-顺丁橡胶吸附作用的影响,提出炭黑凝胶值A和分子量M的关系式:A_单=Ke^-b/^M.实验表明,镍和稀土两种顺丁橡胶有相同的b值.对该式二阶求导表明,当分子量小于b/2时,炭黑凝胶值明显减小.由上式推导出一般多分散炭黑混炼胶样品中可溶胶的分子量及分子量分布的计算式.计算值和实测值吻合较好.更多还原

【Abstract】 An equation correlating bound rubber content A and molecular weight M of the monodisperse polymer has been proposed:A = Ke-b/M(2)(Fig. 3)Parameter b was shown to be constant for two types of cis-1,4-polybutadi-ene rubber(Ni-and rare-earth-catalyzed). From the second derivative of equation(2), it can be shown that when the molecular weight of the polymer is smaller than b/2, bound rubber content will decrease strikingly. Starting from Equation(2), Equations(5), (6)and(7)have been derived, for calculating, respectively, the molecular weight distribution Ws(M) and the weight and number average molecular weights, Mw and Mn, s, of the soluble rubber in the carbon black compound. The only parameter is b. Calculated values from these equations are in agreement with experimental values from Gel Pe-rmention Chromatography.更多还原