Vinyl Cis Rubber superior polymer for future trends

International Conference on Materials Research and Innovation

Puvanatvattana, T.^1 ; Chansorn, T.^1

UBE Technical Center (Asia) Limited, Rayong

21000, Thailand^1

关键词: Cobalt catalyst system;    Conveyor belts;    Crystalline domains;    Crystalline syndiotactic;    Dynamic mechanical property;    Flex crack resistance;    Loss performance;    Stress-induced crystallization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/526/1/012031/pdf
DOI  :  10.1088/1757-899X/526/1/012031

来源: IOP

【 摘 要 】

Vinyl Cis Rubber (VCR) is cis-1,4-polybutadiene reinforced by highly crystalline fibrous syndiotactic-1,2-polybutadiene (SPB). It has been developed and commercialized by Ube Industries Co.,Ltd. The highly crystalline syndiotactic-1,2-polybutadiene having melting point (M.p.) up to 473K is obtained by using cobalt catalyst system. Fibrous crystalline domains in VCR are effective for the stress-induced crystallization of the rubber matrix. VCR has various improved properties such as high green strength, good processing, large modulus, good flex-crack resistance, etc. The improvement of physical and dynamic mechanical properties depends on the content of syndiotactic-1,2-polybutadiene dispersion in cis-1,4-polybutadiene matrix and rubber compound recipe. For examples; with the same compound recipe, VCR vulcanized significantly improve in modulus up to 80%, increase hardness up to 10%, and improve in flex-crack resistance. With the same hardness of vulcanized recipe, filler can be reduced down to 10-20 part per hundred rubbers consequently energy loss performance can be improved up to 10-18%. This polymer is widely used in eco-friendly tires, high performance tires, out sole of shoe, conveyor belts and other rubber goods.