chain model. The conformation, the maximum length, and the lp of the chain are only weakly dependent on the concentration of the added salt. These results indicate that we have successfully obtained a new kind of polyelectrolyte with a highly rigid chain, a high charge density, and a narrow molecular weight distribution, which can serve as a new model macromolecule in studying rodlike polyelectrolytes
为了构建新型棒状聚电解质,从其前体聚[2,5-双(4'-neopentylsulfophenyl)制备了聚[2,5-双(4'-磺基苯基)
苯乙烯钠](PSBSS)。
苯乙烯](PBNSS),通过原子转移自由基聚合反应进行聚合。小角度X射线散射(
SAXS)结果表明,PBNSS呈六方柱状相,而PSBSS呈块状近晶A相。
水溶液中PSBSS的构型为圆柱状,圆柱的长度和直径均为ca。25 nm左右 分别为2.4 nm。
水溶液中PSBSS链的持久长度(l p)为11.50±0.09 nm,这是通过将
SAXS轮廓与改进的蠕虫状链模型拟合而计算得出的。构型,最大长度和l链的p仅弱地依赖于所添加盐的浓度。这些结果表明,我们已经成功地获得了一种具有高刚性链,高电荷密度和窄分子量分布的新型聚电解质,可以作为研究棒状聚电解质的新型高分子模型。