TBL Peiris

  RECYCLING OF TIRE RUBBER In 1840, Charles Goodyear invented the process "Vulcanization" to convert soft natural rubber into a hardened form by the formation of cross-links in between rubber molecules, bridged by Sulphur atoms. Simply Vulcanization can be defined as the "heating of rubber with sulfur" which is an irreversible process and is predominantly used to produce automobile tires. The global consumption of natural rubber for the tire industry is 76% of all the natural rubber produced globally. According to the year 2019 statistics, over 3 billion tires are manufactured annually, worldwide. The tire is a composite product of natural rubber, polymer derived from non-renewable petroleum products, various chemicals, steel, and fabrics and is designed for use in a single generation. Once the tire is worn out, it becomes an industrial waste. There are serious concerns about the disposal of used tires in the environment such as possible fire hazards(tire fires), in...

  SILICONE RUBBER Silicone rubber is an elastomer composed of Silicone. They are thermosetting polymers. The elastomer does not possess a Carbon backbone like in other organic rubbers. The rubbers are chemically polysiloxane of the general formula. Where R is methyl, phenyl, vinyl or trifluroprofyl Manufacturing methods of Silicone rubber 02 techniques have been used to manufacture Silicone rubbers Hydrolysis of the appropriate dichlorosilanes to form cyclic tetrasiloxanes Conversion of cyclotetracysiloxanes to long-chain siloxanes, in the presence of the suitable catalyst Silicone rubbers are available in the market in the form of solid or liquid.The solid form molecular weight is high and composed of long polymer chains. The solid Silicone rubbers are processed by the conventional method of the industry and the liquid form is vulcanizing at room temperature.The liquid Silicone rubber is composed of shorter chains, therefore the molecular weight is low. Liquid Silicone rubber has ...