磺化聚苯醚离聚体的溶液性质

BEHAVIOR OF SULFONATED POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE)AND THEIR SALTS IN SOLUTION

研究了磺化度为20.9mol％的磺化聚苯醚(S-PPO)的钠盐和锂盐在四氢呋喃/甲醇混合溶剂中的离聚体行为。S-PPO离聚体在溶液中的链聚集状态与聚合物浓度、阳离子半径密切相关。当Na-SPPO的浓度高于3g/dL时,在30～40℃范围内其聚集度DA与浓度C的关系为:DA=ke^(εc)常数K和β分别表示为与发现链聚集的起始浓度和链聚集速率相关的常数。

A series of sulfonated poly (2, 6- dimethyl-1, 4-phenylene oxide) (S-PPO) were prepared.The solution behavior of S-PPO with 20.9 mol% sulfonyl group and its salts in mixedTHF/MeOH was studied. It is shown that the state of ehain aggregation of S-PPO ionomersin solvent was e'osely related to the polymer coneentration and radius of the cation of salts.The relationship between degree of aggregation and ionomer eoneentration was DA =Ke^(BC)when the eoneentration was higher than 3g/dL. Here K and β were the eonstants relatedto the starting aggregation eoneentration and the rate of ehain aggregation, respeetively.