Pengaruh oli bekas terhadap sifat karet riklim dan kualitas vulkanisatnya

The objective of the research was to study the effect of the used-lube oils as reclaiming oil on the production of reclaim from waste rubber of tyre-retreading industry and quality of its vulcanizate. The amounts of the lube oils were varied from 2.5 to 15% with range of 2.5% per 100 parts of waste rubber weigh. Reclaiming of rubber was carried out in a vertical autoclave at 120o for 1 hour, and reclaimed rubber were milled by two-roll mills machine. Reclaimed rubbers were compounded with RSS I to evaluate physical properties of their vulkanizates. Generally, the physical properties of vulcanizates containing produced reclaimed rubber was better than the vulcanizates containing market reclaimed rubber. The vulcanizates containing reclaim with 5% used-lube oil performed the best physical properties i.e 103.18 kg/cm2 tensile strength, 405,25% elongation at break, 50 shore A hardness, 57.11 kg/cm2 tearing resistance, 1.04 g/cm2 density 1.13 mm3/kgm abrasion resistance, and resistance to 150,000 cycles flexing respectively. The reclaimed rubber with 5% used-lube oil has characteristics 38.77% rubber hydrocarbon, 26.46% carbon black, 25.98% acetone extract, and 6,55% ash contents respectively.