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Vortex fluidic mediated synthesis of polysulfone.

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Polysulfone (PSF) synthesized in a vortex fluidic device (VFD) yields unique sheet-like or fibrous particles, unlike the spherical particles from batch processing. VFD-prepared PSF exhibits comparable thermal and molecular properties to conventional methods.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Polysulfone (PSF) is a high-performance thermoplastic polymer.
  • Conventional batch synthesis methods for PSF have limitations in particle morphology control.
  • Vortex fluidic devices (VFDs) offer potential for novel material synthesis under controlled conditions.

Purpose of the Study:

  • To synthesize Polysulfone (PSF) using a vortex fluidic device (VFD) under confined mode.
  • To compare the properties of VFD-synthesized PSF with conventionally batch-prepared PSF.
  • To investigate the influence of VFD operating parameters on PSF characteristics.

Main Methods:

  • PSF synthesis via reaction of disodium salt of bisphenol A (BPA) with 4,4'-dihalodiphenylsulfone under anhydrous conditions.
  • Utilized a vortex fluidic device (VFD) in confined mode, varying rotational speed, tilt angle, and temperature.
  • Characterization using Scanning Electron Microscopy (SEM) for morphology, Gel Permeation Chromatography (GPC) for molecular weight (Mw), Differential Scanning Calorimetry (DSC) for glass transition temperature (Tg), and Thermal Gravimetric Analysis (TGA) for decomposition temperature.

Main Results:

  • VFD synthesis produced sheet-like or fibrous PSF particles, contrasting with spherical particles from batch synthesis.
  • SEM confirmed distinct morphologies based on reaction time in the VFD.
  • Optimal VFD conditions (6000 rpm, 45° tilt, 160°C, 1h) yielded PSF with Mw ~10,000 g/mol, Tg ~158°C, and decomposition temperature ~530°C.
  • These properties were comparable to conventionally prepared PSF.

Conclusions:

  • VFD synthesis offers a method to control PSF particle morphology.
  • The VFD provides a scalable platform for producing high-performance polymers.
  • VFD-synthesized PSF demonstrates comparable thermal and molecular properties to conventionally produced materials.