Determination of Thermal Degradation of Vulcanized Rubbers Using Diffracted SH Ultrasonic Waves

Mikio Fukuhara, Yoshiyuki Kuwano, Atsuko Tsugane, Masamitsu Yoshida

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Thermal degradation of NBR and CR heated in air was determined by analysis of diffracted SH ultrasonic waves. Thermal degradation was evaluated by examining wave pattern characteristics of SH waves passing through the surface depth between transmitter and receiver. Thermal crosslinking of main chains in thermally degraded NBR and CR, accompanied by lowering of mechanical properties, can evaluate by decrease of launched time and appearance of 0.9 MHz side peak of the power spectrum. The thermal degradation also causes phase delay at high frequencies, showing regression of viscoelasticity associated with formation of dangling ends.

Original languageEnglish
Pages (from-to)497-503
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume37
Issue number6
DOIs
Publication statusPublished - 1999 Mar 15

Keywords

  • Crosslinking
  • Diffracted SH waves
  • Frequency shift
  • NBR and CR
  • Phase delay
  • Thermal degradation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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