Homo-poly(ionic liquid) (HomoPIL) microsphere particles of poly[2-(methacryloyloxy)ethyltrimethylammonium][bis(trifluoromethanesulfonyl)imide] (P[MTMA][TFSI]) and poly[2-(methacryloyloxy)ethyltrimethylammonium][hexafluorophosphate] (P[MTMA][PF]), as well as their corresponding copolymer microsphere particles obtained through copolymerization with hexyl methacrylate (HMA), were synthesized as electrorheological (ER) materials. The morphology and structure of these synthesized particles were characterized using scanning electron microscopy (SEM), H nuclear magnetic resonance spectroscopy (H NMR), Fourier-transform infrared spectroscopy (FT-IR), and small-angle X-ray scattering spectra (SAXS). Electrorheological measurements were conducted for these polyelectrolyte-based suspensions at room temperature, revealing that the HMA composition has a different effect on the ER effect of the two poly(ionic liquid)s. Differential scanning calorimetry (DSC) and temperature-modulated dielectric analysis (TMDA) were employed to investigate the effect of HMA composition on the glass transition temperature and interfacial polarization of these polyelectrolytes, suggesting that the incorporation of HMA affect the ER effect of PILs via changing the density of charge carriers and the counterion mobility. This study presents a potential approach for enhancing the electrorheological properties of poly(ionic liquid)s.

中文翻译：

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均聚离子液体和聚离子液体-甲基丙烯酸己酯共聚物微球粒子的界面极化和电流变效应

聚[2-(甲基丙烯酰氧基)乙基三甲基铵][双(三氟甲磺酰基)亚胺](P[MTMA][TFSI])和聚[2-(甲基丙烯酰氧基)乙基三甲基铵][六氟磷酸盐的均聚(离子液体)(HomoPIL)微球颗粒]（P[MTMA][PF]）及其与甲基丙烯酸己酯（HMA）共聚得到的相应共聚物微球颗粒被合成为电流变（ER）材料。使用扫描电子显微镜 (SEM)、1H 核磁共振光谱 (1H NMR)、傅里叶变换红外光谱 (FT-IR) 和小角 X 射线散射光谱 (SAXS) 对这些合成颗粒的形态和结构进行了表征）。在室温下对这些聚电解质悬浮液进行了电流变测量，结果表明 HMA 组合物对两种聚（离子液体）的 ER 效果具有不同的影响。采用差示扫描量热法 (DSC) 和温度调制介电分析 (TMDA) 研究了 HMA 组成对这些聚电解质的玻璃化转变温度和界面极化的影响，表明 HMA 的掺入通过改变载流子密度和反离子迁移率。这项研究提出了一种增强聚（离子液体）电流变性能的潜在方法。