سعید تقوایی

The Gel Content in Initial Poly Butadiene Reduces the Chemical Bonding and Adhesion During the Production And Curing Process And Causes the Groove Cracking.therefore in This Study, The Thermal Decomposition of the Polymer PBR was Studied by Methods STA In 0-650 ° C. Thermal Behavior of Poly Butadiene Different Samples Were Studied and Analyzed. DSC Curves Showed A Network Building. Physico Mechanical Properties of Rubber Compounds Based on BR Were Measured. The Results Showed that There is A Good Correlation Between Physicco-Mechanical and Groove Cracking of Tire Tread With The Percentages of Gel Content of Different Type of Initial PBR.

This research work is devoted to the investigation on the use of silica on thefatigue-to-failure property of a tire tread compound. A reference compoundwas first designed in which 60 phr carbon black was used as the reinforcingfiller. While keeping the total of filler content to be constant as 60 phr, three additionalcompounds with 5, 10 and 20 phr silica were then manufactured. The classical staticand dynamic tests were carried out on appropriate samples made from these compoundsto determine tensile strength, hardness, abrasion resistance, fatigue-to-failure,dynamical-mechanical properties and temperature rise due to heat build-up. Theresults showed that by replacing part of carbon black with equivalent amount of silica,a major increase in fatigue resistance is obtained to the point that 20 phr silica hasthe most significant effect when subsituting 5 and 10 phr silica. The DMTA analysesrevealed that the best compromise between fatigue properties, rolling resistance andwet/ice traction can be achieved at 5 to 10 phr silica substitution