Heat resistant matrix resins based on addition-type bisimidobenzimidazoles

✍ Scribed by John A. Mikroyannidis

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 377 KB
• Volume: 27
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(91)90223-b

✦ Synopsis

Bismaleimides containing benzimidazole moieties were synthesized and characterized by i.r. and ~H-NMR spectroscopy. The DTA thermograms of polymer precursors showed exotherms at 139-210 ° attributed to the thermally induced crosslinking reactions. The curing temperatures were shifted to higher temperatures with decreasing concentration of maleimide groups in monomers. The thermal stabilities of cured resins were evaluated by TGA in N2 and air atmospheres. They were stable up to 317-347 ° both in N 2 and air and formed an anaerobic char yield of 75% at 800 °.