Synthesis of a bifunctional epoxy monomer containing biphenyl moiety and properties of its cured polymer with phenol novolac

✍ Scribed by Masashi Kaji; Kazuhiko Nakahara; Takeshi Endo

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 234 KB
• Volume: 74
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19991017)74:3<690::aid-app23>3.0.co;2-x

✦ Synopsis

A new type of epoxy resin containing a 4,4Ј-biphenylene moiety in the backbone (Bis-EBP) is synthesized and confirmed by elemental analysis, infrared spectroscopy, and 1 H-nuclear magnetic resonance spectroscopy. In addition, to evaluate the influence of the 4,4Ј-biphenylene group in the structure, an epoxy resin having a 1,4-phenylene group in place of the 4,4Ј-biphenylene moiety (Bis-EP) is synthesized. The cured polymer obtained through the curing reaction between the new biphenylcontaining epoxy resin and phenol novolac is used for making a comparison of its thermal and physical properties with those obtained from Bis-EP and bisphenol-A (4,4Ј-isopropylidenediphenyl)-type epoxy resin (Bis-EA). The cured polymer obtained from Bis-EBP shows markedly higher fracture toughness of 1.32 MPa m 1/2 , higher glass transition temperature, lower moisture absorption, and higher thermal decomposition temperature.