| Carbon black used traditionally as reinforcing material in tire industry, but inrecent years, after Michelin put forward the concept of "green tire", countries all overthe world formed development boom of white carbon black, as its excellent features of"low heat, low hysteresis" which shows in tire rubber, it makes "the contention "intensified in the carbon black industry, and even has a tendency to instead thetraditional carbon black.but white carbon black and other new type of inorganic fillercan not combined with rubber without coupling agent, But the thermal stability of thiskind of new type packing at high temperature has rarely been studied. thermal stabilityis closely related to the safety performance of the tire obviously, so it is necessary to bestudied.When carbon black supplied in the rubber, it will combine the rubber for the centerwith carbon black. The structure can produce rubber reinforcing effect, and becomingthe key factor of vulcanized rubber performance.Therefore, research on the generationmechanism and the structure of the bound rubber can reinforcing the understand ofmechanism of carbon black. Dynamic thermal mechanical analysis method, moreover,can control the temperature in the process, pressure the rubber vibration load, it canbe to some extent,simulate the actual process of tyres, study its reinforcing performanceadvantages and disadvantages.In this paper, based on the three kinds of popular filler which current used in awide range,Ordinary carbon black N330, N660, high structure carbon black N234,N115and white carbon black TB-2, GP, Made an experiment compared to them.Theresearch content mainly divided into three parts. Explored the preparation process parameters of high quality bound rubber, and scan the typical microstructure of carbonblack. By using thermal dissociation method, we can research the internal bonding typeand key size of bound rubber, and detect the macroscopic mechanics tensile propertiesof vulcanizates, find the relationship between plastic internal force and macromechanical properties of the vulcanizates. Finally, using the dynamic thermalmechanical analysis, the dynamic storage modulus, loss modulus and loss Angle,relaxation modulus, strain recovery physical quantities of6kinds of vulcanizates weremeasured respectively in temperature spectrum and frequency spectrum, and to judgethe macro performance of the rubber.The experimental results are as follows:(1)The physical binding force of white carbon black is superior to the ordinarycarbon black and high structure carbon black.Chemical adsorption force and chemicalbonding force of high structure carbon is the best, Comparing the Bonding energy inactive center of the fillers surface, ordinary carbon is the best and white carbon black isthe worst.300%stretching stress is proportional to the strength of covalent bond forcerelations, the tensile strength is proportional to the physical binding force stability, EB isproportional to the physical binding force.(2)Under low temperature, ordinary carbon have excellent resilience ability, gooddurability, low hysteresis. It showed the best combination of stability on hightemperature, but the temperature range of the damping effect is the most wide,and it iseasy heat, high lag. The glass transition temperature of high structure carbon is thelowest,that means that it has the most excellent low temperature performance.Thecrosslinking stability of White carbon structure is the best, durability, and the heatgenerating is minimum. It showed consistent with bound rubber phenomenon on hightemperature, it means that there are many internal combination keys, but more belong tophysical union, bond energy is not high.(3)The results indicate that we can obtain high quality bound rubber under thecondition that rubber/toluene solution concentration (0.02g/ml), the ratio of rubber andcarbon black (2:1), reaction time (10hs), standing time (72hs). In this time, dry gel wasextracted completely, and the content deviation of bound rubber is minimum. |
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