An interpenetrated system based on a tetrafunctional epoxy resin and a thermosetting bismaleimide: Structure–properties correlation

✍ Scribed by Pellegrino Musto; Ezio Martuscelli; Giuseppe Ragosta; Pietro Russo; Gennaro Scarinzi

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 302 KB
• Volume: 69
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19980801)69:5<1029::aid-app23>3.0.co;2-v

✦ Synopsis

The kinetics and mechanism of the curing process of a thermosetting blend formed by tetraglycidyl-4,4 -diaminodiphenyl methane and N,N-bismaleimido-4,4diphenyl methane (BMI) cured in the presence of 4,4-diaminodiphenyl sulfone, was investigated in detail by Fourier transform infrared spectroscopy. Information on the molecular structure of the network formed upon curing was derived. Dynamic-mechanical measurements on dry samples indicated an interpenetrated polymer network-like structure. Sorption measurements at 70ЊC showed a reduction of the water uptake at equilibrium in the presence of substantial amounts of BMI in the system (43.5% body weight). Finally, the dynamic-mechanical analysis of wet samples demonstrated a reduction of the plasticizing efficiency of the absorbed water in the presence of BMI.