Synthesis of a novel epoxy resin containing diphenylether moiety and thermal properties of its cured polymer with phenol novolac

✍ Scribed by Masashi Kaji; Kazuhiko Nakahara; Koichiro Ogami; Takeshi Endo

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 151 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19991001)37:19<3687::aid-pola4>3.0.co;2-p

✦ Synopsis

A new type of epoxy resin containing 4,4Ј-diphenylether moiety in the backbone (2) was synthesized, and was confirmed by gel permeation chromatography, infrared spectroscopy, and 1 H nuclear magnetic resonance spectroscopy. In addition, in order to evaluate the influence of 4,4Ј-diphenylether moiety in the structure, epoxy resins having 4,4Ј-biphenylene moiety (4) and having 1,4-phenylene moiety (6) in place of 4,4Ј-diphenylether moiety were synthesized. The cured polymer obtained through the curing reaction between the new diphenylether-containing epoxy resin and phenol novolac was used for making a comparison of its thermal and physical properties with those obtained from 4, 6, and bisphenol-A (4,4Ј-isopropylidenediphenol) type epoxy resin. The cured polymer obtained from 2 showed markedly higher anaerobic char yield at 700°C of 44.0 wt %, higher fracture toughness, and higher mechanical strength and modulus.