Abstract
Abstract Amorphous solid-sate polymerization was efficiently synthesized using bisphenol-A-based polyarylate and isosorbide- or isomannide-based polyarylates, which represent promising super engineering plastics. The prepolymers were synthesized through the solution polymerization of bis(1,1,1,3,3,3-hexafluoro-2-propyl) terephthalate and isophthalate with bisphenol-A, isosorbide, or isomannide, using 1,8-diazabicyclo[5.4.0]-7-undecene and 1,5-diazabicyclo[4.3.0]-5-nonene as catalysts. The obtained prepolymers were then heated incrementally from 40 to 180 °C in the solid state under vacuum conditions. The bisphenol-A-based polyarylate product derived from a mixture of bis(1,1,1,3,3,3-hexafluoro-2-propyl) terephthalate (25%) and bis(1,1,1,3,3,3-hexafluoro-2-propyl) isophthalate (75%) was amorphous, exhibiting a molecular weight of 63,000 and a glass transition temperature of 208 °C. Meanwhile, isomannide-based polyarylate, a novel bio-derived amorphous polymer prepared using a similar approach, exhibited the highest glass transition temperature of 179 °C among known isosorbide-based polymers. Overall, our amorphous solid-sate polymerization method proved to be more efficient compared with conventional solid-sate polymerization, which involves crystallization.
Published Version
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