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Date of Publication:2022-10-10

Journal:高分子学报

Issue:6

Page Number:616-621

ISSN No.:1000-3304

Abstract:1, 1-Bis (4-methoxyphenyl) ethylene (BMPE) was prepared from alpha-ketocarboxylic acids and anisole, and with demethylation reaction a kind of biphenol 1, 1-bis (4-hydroxyphenyl) ethylene (BHPE) containing crosslinkable moiety was obtained. The structure of the monomers was measured by H-1-NMR, elemental analysis, and the melting point of the monomers was measured by DSC. A kind of photo-crosslinkable fluorinated poly(arylene ether) has been prepared by polycondensation reaction with BHPE and decafluorobiphenyl (DFBP) by using suspending CaH2 with trace amount of KF as catalyst at low temperature. The structures of the obtained polymer were measured by H-1-NMR and F-19-NMR. The molecular weight of polymer was monitored by gel permeation chromatography (GPC), and the resulting number-average molecular weight is 23400 and the polydispersity index index is 2. 94. The obtained polymer exhibits excellent solubility in common organic solvents at room temperature which makes it easy for optical film fabrication. The photo curing of the polymer was monitored by FTIR spectroscopy,and after UV irradiation 10 min the polymer can be completely crosslinked with the present photo initiator. The cured polymer shows good chemical resistance. So the polymer can be used for multi-layer processing. The obtained polymer also shows good thermal stability (the glass transition temperature is 160 degrees C, the temperatures of 5% mass-loss is 465 degrees C after curing).

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