Study on Preparation and Properties of Foam Rubber from Natural Rubber Ribbed Smoked Sheet Using Salt of Amino Alcohol and Carbonic Acid as Foaming Agent

Abstract:

This work was a study of the preparation and properties of foam rubber from natural rubber ribbed smoked sheet 3 (RSS3) using synthesized salt of amino alcohol and carbonic acid as foaming agent. The synthesised salts were varied in the amount of 0.25, 0.4, 0.6, 0.8, 1, 3 and 5 phr to compare with 0.4 phr of the commercial foaming agent (azodicarbonamide). The foam rubbers prepared through conventional vulcanization with sulfur were compounded by using a two-roll mill and formed into cylinder by a compression molding machine at 170°C for 7 min. The specimens were characterized including compressive stress, shape deformation and cellular morphology. SEM micrographs showed that the pore or cell content in foam rubber is higher with increasing the amount of salt while cell shape is bigger and more shapeless. However, cell distribution is constancy for all conditions. For the mechanical properties, the compressive stress of foam rubber increases with incresing the salt up to 1 phr and then decreases as well as porosity increases. Whereas, the dimension of all foam rubbers is shrunk over time. Therefore, this study indicated that the synthesized salt of amino alcohol and carbonic acid could create the cells into rubber and provided the size and shape of cell and the good mechanical properties competitive with commercial foaming agent.

• Periodical: Advanced Materials Research (Volumes 1044-1045)
• Pages: 115-118
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1044-1045.115
• Online since: October 2014
• Authors: Thritima Sritapunya*
• Keywords: Amino Alcohol, Foam Rubber, Foaming Agent, Ribbed Smoked Sheet 3

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