Dynamic mechanical properties and adhesive strengths of epoxy resins modified with liquid rubber. I. Modification with ATBN

✍ Scribed by Akio Takemura; Bun-Ichiro Tomita; Hiroshi Mizumachi

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 761 KB
• Volume: 30
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1985.070301007

✦ Synopsis

The dynamic mechanical properties and the adhesive strengths of Epikote 828 and Epikote 828ATBN blend systems were investigated. The ATBN blend systems were proved to be completely incompatible with the dynamic mechanical measurement and also fitted well with Takayanagi's model which was designed for completely incompatible tw+phase systems. The epoxy resin had a nonreacted part when cured at room temperature. The blending of ATBN reduced the nonreacted part of the epoxy resin, and made contributions to the adhesive strengths. In the case of tensile test of crosslap specimens using aluminium as adherends, the adhesive strengths of ATBN blend systems were almost 1.5fold of those of epoxy resin without blending of ATBN. As for wood adherends, the maximum of the adhesive strengths was found at 60°C for epoxy resin without blending of ATBN, and at WC for ATBN blend systems. The facts meant that there were mutual interactions between the adhesive strengths and the viscoelastic behavior of the adhesive polymers in the two-phase systems as observed in completely miscible polymer blends. There was not pronounced distinction between epoxy resins without blending of ATBN and ATBN blend systems, as to the shear adhesive strengths.