Slurries with low viscosity and polystyrene (PS) nanoparticle concentration up to 52 wt.% have been synthesized in one-step process with no waste generation, by suspension polymerization and optimizing the concentration of dispersants (sodium dodecyl sulfate, SDS, and the cosurfactant, CS). The CS was manufactured in situ from tetraethyl orthosilicate (TEOS) and vinyltriethoxysilane (VTES). The incorporation of the CS on the PS polymer was confirmed by FT-IR, EDS, and TGA, observing the functionalization of PS nanoparticles with SiOH. Morphology and particle size of the dispersed solid, together with viscosity and stability of the polystyrene slurries (PSSs), were analyzed, finding an abrupt reduction of the viscosity for PSSs by combining SDS and CS. Addition of SDS and CS (3.0 and 1.5 wt.%, respectively) allowed to produce PSSs with improved stability (ζ = − 48.5 mV after 1 year), low viscosity (20.5 mPa·s at 25 °C), and Newtonian behavior, containing up to 40.0 wt.% of single-spherical PS nanoparticles (< 100 nm). Graphical abstract . .

中文翻译：

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乙烯基封端硅烷在一步法生产高浓度聚苯乙烯浆料中的作用

通过悬浮聚合和优化分散剂（十二烷基硫酸钠、SDS 和助表面活性剂， CS）。CS 由原硅酸四乙酯 (TEOS) 和乙烯基三乙氧基硅烷 (VTES) 原位制造。通过 FT-IR、EDS 和 TGA，观察 PS 纳米颗粒与SiOH 的功能化，证实了 CS 与 PS 聚合物的结合。分析了分散固体的形态和粒度，以及聚苯乙烯浆体 (PSS) 的粘度和稳定性，发现通过结合 SDS 和 CS，PSS 的粘度突然降低。添加 SDS 和 CS（3.0 和 1.5 重量％，分别）允许生产具有改进的稳定性（1 年后 ζ = − 48.5 mV）、低粘度（25 °C 时为 20.5 mPa·s）和牛顿行为的 PSS，含有高达 40.0 wt.% 的单球形 PS 纳米粒子(< 100 纳米)。图形概要 。.