Crystallization and solid‐state polymerization of poly(aryl ester)s

Amorphous solid-sate polymerization (SSP) was efficiently synthesized bisphenol-A (BPA)-based polyarylate (BPA-PAR) and isosorbide- or isomannide-based polyarylates (ISB-/IMN-PARs), 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 (BHFTP and BHFIP) with BPA, ISB, or IMN, 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°C to 180°C in the solid state under vacuum conditions. The BPA-PAR product derived from a mixture of BHFTP (25%) and BHFIP (75%) was amorphous, exhibiting a molecular weight (Mw) of 63,000 and a glass transition temperature (Tg) of 208°C. Meanwhile, ISB-PAR, a novel bioderived amorphous polymer prepared using a similar approach, exhibited the highest Tg of 179°C among known ISB-based polymers. Overall, our amorphous SSP method proved to be more efficient compared to conventional SSP, which involves crystallization.

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Crystallization and solid‐state polymerization of poly(aryl ester)s

Cited by 3 publications

References 13 publications

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