TitleCompressive properties and water contact behavior of opened-cell green rubber foam at different blowing agent concentration
SourceMITC2015-pp 86-87
AuthorN. Mohamad, M. Mazliah, Z. Nur Sharafina, M.N. Amirul Asyraf, M.F.B. Abdollah, A.M. Hairul Effendy


Green rubber foam from reclaimed rubber has high potential to replace available foam products in the market. It provides choices for cheaper material with only small trade-in in the properties and durability. This study is part of our effort to develop new green rubber foam from reclaimed rubber glove. It is focusing on the effect of sodium bicarbonate concentration at 4, 6, 8, 10 and 12 parts per hundred rubber (phr) as blowing agent for the foaming process. The samples were prepared by melt compounding using an internal mixer and expanded via two step heat transfer foaming process. Performance of the green rubber foam was tested for compressive strength and water contact behavior via compression testing and water absorption. The results were supported with morphological analyses using scanning electron microscopy (SEM). From the experimental, sodium bicarbonate with concentration of 4 phr generated the smallest pores and highest relative density of 0.9. The pore structure of the open cell resulted to the lowest water absorption rate of 1.7 x 10-3 g/min as well as the highest compressive strength of 105 kPa. 


MITC2015-pp 86-87