Development of Sound Absorption of Rubber Foam using Sulfonyl Hydrazide

  • Naserae Waedoorlae
  • Rohanee Po-ye
  • Suwaiba Kaseang
  • Darika Jaaoh
Keywords: natural rubber, sound absorption, sound absorption coefficient, noise reduction


This research is to develop the sound absorption rubber foam using sulfonyl hydrazide. The objective of this work is to find the optimal condition to increase porousness in natural rubber. The relations between the sulfonyl hydrazide volume and feather of cavity in the natural rubber matrix are investigated. Latexes and their chemical solution are mixed with a blowing agent with the quantity of 0, 0.3, 0.5, 0.7 and 0.9 phr, respectively, in order to observe mechanical properties and sound absorption ability. The results show that the latex foam mixed 0.5 phr of sulfonyl hydrazide is the best one of small and stable porous samples. It affects the maximum sound absorption coefficient and noise reduction. Moreover, this porous samples have a wide frequency range ability.