Structural details of thermoresponsive, cationically poly(N-iso-propylacrylamide-co-methacrylamido propyl trimethyl ammonium chloride) microgels and the influence of the anionic electrolyte polystyrene sulfonate (PSS) on the internal structure and dynamics of the cationic microgels have been studied with a combination of small angle neutron scattering (SANS) and neutron spin echo (NSE) spectroscopy. While SANS can yield information on the overall size of the particles and on the typical correlation length inside the particles, studying the segmental polymer dynamics with NSE gives access to more internal details, which only appear due to their effect on the polymer motion. The segmental dynamics of the microgels studied in this paper is to a large extent suppressed by the PSS additive. Possible scenarios of the influence of the polyanions on the microgel structure and dynamics are discussed.

中文翻译：

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高分子电解质抑制微凝胶的波动

研究了热响应性阳离子聚（N-异丙基丙烯酰胺-共-甲基丙烯酰胺基丙基三甲基氯化铵）微凝胶的结构细节以及阴离子电解质聚苯乙烯磺酸盐（PSS）对阳离子微凝胶内部结构和动力学的影响。小角度中子散射（SANS）和中子自旋回波（NSE）光谱的结合。虽然SANS可以提供​​有关粒子总体大小和粒子内部典型相关长度的信息，但使用NSE研究分段聚合物动力学可以访问更多内部细节，这些细节仅由于它们对聚合物运动的影响而出现。本文研究的微凝胶的分段动力学在很大程度上受到PSS添加剂的抑制。