Ultrasonic study of gelation and vitrification in curing process of allyl-oligomer

Hirotaka Okabe, Wataru Takashima, Seiji Taki, Kazumi Matsushige

Research output: Contribution to journalArticlepeer-review


An automatic ultrasonic velocity measuring system was utilized to investigate an isothermal curing process of allyl-ester, a new thermosetting resin composed of an allyl-oligomer and a curing agent. The logarithmic curing time vs sound velocity curves showed apparent bends at curing temperatures below 140°C, while a monotonous relation above 150°C.The analysis based on a reaction rate equation suggested that such ultrasonic behavior resulted from the differentmechanism of gelation and/or vitrification, which became dominant depending on the curing temperature.

Original languageEnglish
Pages (from-to)31-33
Number of pages3
JournalJapanese journal of applied physics
Publication statusPublished - Jan 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)


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