Polysulfone (PSF) was prepared under high shear in a vortex fluidic device (VFD) operating in confined mode, and its properties compared with that prepared using batch processing. This involved reacting the pre-prepared disodium salt of bisphenol A (BPA) with a 4,4′-dihalodiphenylsulfone under anhydrous conditions. Scanning electron microscopy (SEM) established that in the thin film microfluidic platform, the PSF particles are sheet-like, for short reaction times, and fibrous for long reaction times, in contrast to spherical like particles for the polymer prepared using the conventional batch synthesis. The operating parameters of the VFD (rotational speed of the glass tube, its tilt angle and temperature) were systematically varied for establishing their effect on the molecular weight ( M _(w) ), glass transition temperature ( T _(g) ) and decomposition temperature, featuring gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) respectively. The optimal VFD prepared PSF was obtained at 6000 rpm rotational speed, 45° tilt angle and 160 °C, for 1 h of processing with M _(w) ～10?000 g mol ~(?1) , T _(g) ～158 °C and decomposition temperature ～530 °C, which is comparable to the conventionally prepared PSF.
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机译：在以限制模式下操作的涡流流体装置（VFD）中的高剪切下制备聚砜（PSF），其性质与使用批量加工制备的性质相比。这涉及使双酚A（BPA）的预制二钠盐与4,4'-二卤代噻苯基砜在无水条件下反应。扫描电子显微镜（SEM）建立在薄膜微流体平台中，PSF颗粒是片状的，用于短反应时间，并且具有长反应时间的纤维，与使用常规批量合成制备的聚合物的球形颗粒相反。系统地改变VFD的操作参数（玻璃管的转速，其倾斜角度和温度），以建立它们对分子量（M _（W）），玻璃化转变温度（T _（G））的影响分解温度分别具有凝胶渗透色谱（GPC），差示扫描量热法（DSC）和热重分析（TGA）。最佳VFD制备的PSF以6000rpm转速，45°倾角和160°C获得，1小时，M _（w）〜10？000 g mol〜（Δ1），t_（g）。 〜158°C和分解温度〜530°C，与常规制备的PSF相当。
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