ABSTRACK EFFECT OF ZINC DIETHYLDITHIO CARBAMATE AND ELEPHANT GRASS (Pennisetum purpureum) ASH AS FILLER ON QUALITY OF FOAM RUBBER Cindy Maharani: Supervised by Dr. Zainal Fanani, M.Si and Dr. Bambang Yudono, M.Sc Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University xi + 50 pages +12 pictures + 7 tables + 6 attachments Research on the Effect of Zink Diethyld…