Test characterization method for early fatigue damage and development process of vulcanized rubber
A technology for vulcanized rubber and fatigue samples, applied in the rubber field, can solve the problems of difficulty in testing multiple samples at the same time, high equipment investment, and achieve the effect of easy operation and data collection, low investment, and wide application prospects.
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Embodiment 1
[0044] 1. Prepare the following formula: according to the tread rubber formula of truck tires NR 100phr, carbon black N234 50phr, sulfur 1.3phr, accelerator NS 1.1phr, zinc oxide 3.5phr, stearic acid 2.0phr, antioxidant 4020 2.0phr, antioxidant RD1.0phr, microcrystalline wax 1.5phr, weigh the experimental raw materials.
[0045] 2. Preparation of vulcanized rubber: use an internal mixer for mixing, set the initial temperature at 80°C, and the rotor speed at 80 rpm. After reaching the initial temperature, add NR and mix for 1 minute, then add zinc oxide and stearic acid and mix for 1 minute. Add half of the carbon black in 30 seconds, knead until 2 minutes and 30 seconds, add anti-aging agent, microcrystalline wax and the remaining carbon black, continue kneading until 4 minutes to remove the glue to get the premixed rubber. The premixed rubber is subjected to 5 times, 10 times and 15 times of thin pass treatment on the open mill respectively. After the treatment is completed, ...
Embodiment 2
[0060] 1) Formula: According to the formula of truck tire tread compound NR 100phr, carbon black N234 variable (0phr, 20phr, 50phr), sulfur 1.3phr, accelerator NS 1.1phr, zinc oxide 3.5phr, stearic acid 2.0phr, antioxidant 40202.0 phr, antioxidant RD 1.0phr, microcrystalline wax 1.5phr, weigh the experimental raw materials.
[0061] 2) Preparation of vulcanized rubber: use internal mixer for mixing, set the initial temperature at 80°C, and the rotor speed at 80 rpm. After reaching the initial temperature, add NR and mix for 1 minute and 30 seconds, then add zinc oxide and stearic acid and mix until Add half of the carbon black at 2 minutes and 30 seconds, add anti-aging agent, microcrystalline wax and the remaining carbon black after mixing until 4 minutes, sweep the car at 5 minutes and 30 seconds, continue mixing until 7 minutes, discharge glue and put it on the open mixer; The parameters are that the roller speed ratio is 25 / 18, the roller temperature is 45°C, and the initi...
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