顺丁橡胶浓溶液流变性质与结构参数及△ML,△∑ML的关系

RELATIONSHIP BETWEEN RHEOLOGICAL PROPERTIES OF CONCENTRATED cis-1,4 POLYBUTADIENE SOLUTION AND ITS STRUCTURE PARAMETERS OR ΔML, ΔΣML

用RheotestⅡ型旋转粘度计,研究了Li,Co,Ni系顺丁橡胶浓溶液的流变性质与结构参数及ΔML,Δ∑ML的关系。在没有凝胶的情况下,Co系顺丁橡胶浓溶液流变行为的非牛顿性显著;Δ∑ML/ML值越大,该胶的支化程度越明显。

The relationship between the theological properties of the concentrated solution of cis-1,4 polybutadiened prepared by Li , Co and Ni catalyst systems , and their structure parameters or ΔML and ΔΣML was studied by means of Rheotest n viscometer . It was found that in the absence of gel in solution , the concentrated solution of cis -1,4 polybutadiene prepared by Co catalyst system had an obvious non - Newtonian behavior . The larger the ΔΣML/ML value ,the greater the branching degree of the rubber was .