【摘要】 该文研究了聚乙烯接枝马来酸酐 (PE g MAH)在极稀和稀浓度范围内的溶液行为 .两个区间内的粘浓关系都呈直线关系 ,但极稀区间的斜率比稀浓度的大得多 .两者的交点C 为临界接触浓度 .随着接枝率的增大 ,比浓粘度逐渐增大 .温度升高也使比浓粘度增大 .更多还原

【Abstract】 The solution property of polyethylene grafted maleic anhydride in extremely dilute and dilute solutions is studied by the method of viscosity at high temperatures.A very sharp crossover is observed in the variation of the reduced viscosity.η sp /C as a function of the concentration for polyethylene grafted maleic anhydride.This crossover is correlated with the critical concentraion of the polymer C ** in which the macromolecular coils start their contacts.For extremely dilute solutions (C<C\+\{**\}),η sp /C changes lineary with concentration in a greater slope than that for dilute solutions (C>C\+\{**\}),This shows the different morphologies and interactions of macromolecular coils in the two regions.The reduced viscosity also increases when the grafted rate and the temperature increase,but C ** inclines to lower concentration with the increase of temperature.更多还原