Effect of diffusional limitations on the gelation of cyanate ester resins

✍ Scribed by Yong Deng; George C. Martin

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 226 KB
• Volume: 64
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970404)64:1<115::aid-app10>3.0.co;2-3

✦ Synopsis

The effect of diffusion control-induced unequal reactivities of functional groups on the gelation of cyanate ester resins was analyzed. By introducing differentiation into the recursive approach, a gelation model was developed to calculate the gel points of systems under diffusional limitations. Modeling results for a Zn-catalyzed cyanate resin show that the unequal reactivities have a significant effect on the gel point and the gelation is delayed to a higher conversion. However, other factors, which may include localized reactions and cycle formation, also contribute to the delay of gelation.