Notes on the production of synthetic rubber
Notes on the production of synthetic rubber
Single recovery
The quality of the rubber and the rate of the reaction both decrease with the polymer advancement, so it is customary to stop the reaction before complete conversion. Unreacted monolayer recovery and purification is an essential step in the synthetic rubber production unit. Recovery methods are used by leachate vaporization or distillation from the solvent system.
Coagulation and drying
Finishing process is usually the deposition of rubber from a leachate emulsion or solvent solution in pieces, after which the rubber is dried and compacted into a batch.
Rubber packaging
The packaging of synthetic rubbers is important because it is sometimes possible to eliminate problems such as adhesion to the packing bag and contamination due to inadequate protection, and some rubbers lose their shape due to flow.
Synthetic rubber production methods
Cold emulsion method
It is done in an emulsion at 5 ° C for 8 to 12 hours. This is often done in a set of reactors. The reaction ends at 60 to 75% conversion. The emulsion is mixed as a leachate in storage tanks and to achieve the desired type of rubber with a suitable agenda. The mixture is first coagulated, then thoroughly washed and dehydrated before drying. Most SBR tires are lubricated before the volcano. The softening of the rubber with oil is compensated by adding soot.
Solution method
In this method, more control is obtained over the spatial structure of the polymer and of course there are its physical properties. The distribution of styrene units at chain dawn is random. This polymer has better abrasion resistance and fatigue, higher viscosity and less heat storage than emulsion polymer.
Under special polymerization conditions, styrene and buta-DN batch copolymers can be produced. These polymers are heat soft and do not require vulcanization to be useful.
Notes on the production of synthetic rubber
- Single recovery
The quality of the rubber and the rate of the reaction both decrease with the polymer advancement, so it is customary to stop the reaction before complete conversion. Unreacted monolayer recovery and purification is an essential step in the synthetic rubber production unit. Recovery methods are used by leachate vaporization or distillation from the solvent system.