eng Science and Education Publishing Journal of Materials Physics and Chemistry 2013-07-06 1 1 35 36 10.12691/jmpc-1-3-2 JMPC2013132 article Ali I. Al-Mosawi aliibrahim76@yahoo.com 1 Technical Institute, Babylon, Iraq Shells powder filler was added to natural rubber grade SMR L. The filler loading was varied from 60 ¨C90 pphr. The mechanical properties included hardness and tensile strength were investigated. The results shown increased hardness continuously with shells powder filler loading from shells powder 60 ¨C90 pphr, but tensile strength decreased after adding shells powder filler. http://pubs.sciepub.com/jmpc/1/3/2/jmpc-1-3-2.pdf natural rubber shells powder filler mechanical properties