Journal
POLYMER
Volume 97, Issue -, Pages 300-308Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2016.05.035
Keywords
Poly(ether sulfone); Curing agent; Transparency
Categories
Funding
- Ministry of Science and Technology, Taiwan [MOST 104-2622-8-007-001]
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A phosphinated biphenol, 6-(1-(4-hydroxy-3-methoxyphenyl)-1-(4-hydroxyphenyl) ethyl)-6H-dibenzo [c,e] [1,2] oxaphosphinine 6-oxide (1), was synthesized from a sustainable phenol, acetovanillone. A methoxy-substituted poly(ether sulfone), methoxy-PES-1, was successfully prepared by the nucleophilic substitution of (1) and difluorodiphenyl sulfone in the presence of potassium carbonate. Another phosphinated biphenol, 6-((4-hydroxy-3-methoxyphenyl)(4-hydroxyphenyl) methyl)-6H-dibenzo[c, e] [1,2] oxaphosphinine 6-oxide (2), was prepared from another sustainable phenol, vanillin. However, the preparation of the methoxy-substituted poly(ether sulfone) based on biphenol (2) is not successful due to the biphenol (2) being unstable in an alkaline condition. After demethylation of the methoxy-PES-1, a phenolic hydroxyl poly(ether sulfone), hydroxyl-PES-1, was obtained. The phenolic hydroxyl linkages of the hydroxyl-PES-1 act as reacting sites for the epoxy resins. High-performance, bendable, flame retardant, and unexpectedly transparent cured epoxy film can be achieved through the curing of hydroxyl-PES-1 with commercially-available epoxy resins. (C) 2016 Elsevier Ltd. All rights reserved.
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