Abstract Acrylamide (AM)/2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS)/styrene (St) (AMAS) and AM/sodium styrenesulfonate (SSS)/St (AMSS) polyelectrolytes were synthesized by micellar copolymerization method and then characterized using 1H-NMR, rheometry, viscometry, dynamic light scattering (DLS) and water solubility analyses. It was found that polyelectrolytes are not soluble in the water due to their high length of St blocks (NH=15.4); however, a significant self-assembly behavior of St nano-sized associations was observed by adding a low amount of SDS (10 mM) to the aqueous solution, resulting in the improved rheological behavior of the corresponding solutions. Effect of the external stimuli including emulsifier (SDS) and electrolyte (NaCl) concentration and temperature on the reduced viscosity of polyelectrolyte solutions was also studied using I-optimal design. Based on the viscosity measurements, notable thickening ability for aqueous solutions of both the AMAS and AMSS samples were observed at a SDS concentration of 6.5 mM, NaCl concentration of 0.55 wt% and temperature of 25 °C, which was further confirmed using oscillatory frequency sweep and dynamic light scattering measurements. Moreover, the higher thickening ability was observed for the AMSS aqueous solution in comparison with the AMAS one. Graphical Abstract

中文翻译：

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高苯乙烯含量疏水改性聚电解质的合成、表征、流变和自组装行为：外部参数对增稠特性和纳米缔合的影响

摘要 采用胶束共聚法合成了丙烯酰胺（AM）/2-丙烯酰胺基-2-甲基-1-丙磺酸（AMPS）/苯乙烯（St）（AMAS）和AM/苯乙烯磺酸钠（SSS）/St（AMSS）聚电解质，然后使用 1H-NMR、流变测定法、粘度测定法、动态光散射 (DLS) 和水溶性分析进行表征。发现聚电解质由于其长的St嵌段(NH=15.4)而不溶于水；然而，通过向水溶液中添加少量 SDS (10 mM) 观察到 St 纳米级联合的显着自组装行为，导致相应溶液的流变行为得到改善。还使用 I 最优设计研究了包括乳化剂 (SDS) 和电解质 (NaCl) 浓度和温度在内的外部刺激对聚电解质溶液的比浓粘度的影响。基于粘度测量，在 6.5 mM SDS 浓度、0.55 wt% NaCl 浓度和 25 °C 温度下观察到 AMAS 和 AMSS 样品水溶液的显着增稠能力，使用振荡频率扫描进一步证实了这一点和动态光散射测量。此外，与 AMAS 水溶液相比，AMSS 水溶液具有更高的增稠能力。图形概要 5 mM、0.55 wt% 的 NaCl 浓度和 25 °C 的温度，使用振荡频率扫描和动态光散射测量进一步证实了这一点。此外，与 AMAS 水溶液相比，AMSS 水溶液具有更高的增稠能力。图形概要 5 mM、0.55 wt% 的 NaCl 浓度和 25 °C 的温度，使用振荡频率扫描和动态光散射测量进一步证实了这一点。此外，与 AMAS 水溶液相比，AMSS 水溶液具有更高的增稠能力。图形概要