Butadiene Rubber SBR is the earliest industrialized synthetic rubber. In 1933, the emulsion polymerization Butadiene rubber was first developed by acetylene synthesis route in Germany, and industrial production began in 1937. 1942 the United States used petroleum as raw materials to produce butadiene rubber. Production also began in the former Soviet Union in 1949.

 

These are copolymers at high temperatures (50 ℃), called high-temperature butadiene rubber. In the early 50, low-temperature butadiene rubber with excellent performance appeared. At present, low temperature emulsion polybutadiene rubber accounts for about 80% of the whole butadiene rubber. Production of oil-filled butadiene rubber began in 1951. After the emergence of butadiene rubber carbon black masterbatch rubber, oil-filled butadiene rubber carbon black rubber, high styrene butadiene rubber, hydroxyl butadiene rubber and liquid butadiene rubber.

 

In the middle of the 60, solution polymerization Butadiene Rubber (SSBR) began to come out.

 

At present, the production of butadiene rubber (including latex) accounts for about 55% of the total synthetic rubber production, is the largest production and consumption of synthetic rubber.

 

Advantages and disadvantages of butadiene rubber: Butadiene rubber is an unsaturated hydrocarbon polymer with a solubility parameter of about. Physicochemical reactions occur under the action of light, heat, oxygen and ozone, but their oxidation is slower than that of natural rubber, and the rate of aging reaction is slower even at higher temperatures. The aging effect of light on rubber is not obvious, but ozone resistance is worse than that of natural rubber.

 

The brittle temperature is about minus 450C and the low temperature performance is slightly worse.

 

Compared with general general purpose rubber has the following advantages and disadvantages:

 

1. Advantages

(1) The glue is not easy to scorch and sulfur, the vulcanization flatness is good.

(2) Wear resistance, heat resistance, oil resistance and aging resistance are better than natural rubber. High temperature wear resistance is good, suitable for the use of tires.

(3) The molecular weight in the processing is reduced to a certain extent, so it is not easy to be over, the plasticity is uniform. The hardness of vulcanized adhesive changes little. (4) High filling can be achieved by increasing the molecular weight. The processing performance of oil-filled butadiene rubber is good.

(5) It is easy to use with other unsaturated general rubber, especially with natural rubber and butadiene rubber, by formula adjustment can overcome the shortcomings of butadiene rubber.

 

2. Disadvantages

(1) The strength of pure glue is low, need to add high-activity reinforcing agent can be used. The difficulty of adding mating agent is larger than that of natural rubber, and the dispersion of mating agent is poor in rubber.

(2) The trans structure is many, the structure is not regular, the side base has the benzene ring, thus than the natural rubber lag loss is larger, the heat is high, the elasticity is low, the cold resistance is also slightly worse. But when the oil is filled, it can reduce the heat.

(3) The vulcanized adhesive shrinkage is large, the strength is low, the adhesion performance is not as good as the natural rubber.

(4) The vulcanization speed is slower than the natural glue.

(5) vulcanized adhesive flexural cracking is better than natural glue, but crack propagation speed is fast.