Rubber Mixture Softener: A Product of Thermal Breakdown of Substandard Polyisoprene

摘要

The possibility of using a tire tread mixture plasticizer based on SKI-3 and SKD as a product of thermal breakdown of substandard polyisoprene (PTDP) was investigated. Fifty-five per cent by mass of PTDP was mixed with PM-100 technical carbon in a tyre tread mixture based on SKI-3 and SKD (70:30), at 5 - 15 parts by mass of PTDP/PM-100 mixture to 100 parts by mass of rubber (in plce of PN-6s oil). The mixture was prepred in a laboratory rubber mixer according to standards acceptable in the rubber industry and vulcanized at 153 C for 30 min. The standard mixture containing PN-6s oil as softener was also tested for comparison.