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http://dx.doi.org/10.7473/EC.2020.55.4.289

The Effects of Liquid Butadiene Rubber and Resins as Processing Aids on the Physical Properties of SSBR/Silica Compounds  

Iz, Muhammet (Department of Polymer Science & Chemical Engineering, Pusan National University)
Kim, Donghyuk (Department of Polymer Science & Chemical Engineering, Pusan National University)
Hwang, Kiwon (Department of Polymer Science & Chemical Engineering, Pusan National University)
Kim, Woong (Department of Polymer Science & Chemical Engineering, Pusan National University)
Ryu, Gyeongchan (Department of Polymer Science & Chemical Engineering, Pusan National University)
Song, Sanghoon (Department of Polymer Science & Chemical Engineering, Pusan National University)
Kim, Wonho (Department of Polymer Science & Chemical Engineering, Pusan National University)
Publication Information
Elastomers and Composites / v.55, no.4, 2020 , pp. 289-299 More about this Journal
Abstract
Highly aromatic (HA) oils are common processing aids used in tire tread compounds. However, they often bleed and evaporate from the vulcanizates during tire use. Thus, the mechanical and dynamical properties of the tire decrease. To overcome this problem, we investigated nonfunctionalized liquid butadiene rubber (LBR-305, Kuraray) and center-functionalized liquid butadiene rubber (C-LqBR), polymerized by anionic polymerization. In addition to the liquid butadiene rubbers, p-tert-octylphenol (P-Resin) and C5 hydrocarbon (H-Resin) tackifier resins, which can induce entanglement of rubber compounds, were researched as a processing aid to solve the bleeding problem. Liquid butadiene rubbers have significantly reduced extraction loss by crosslinking with the main rubber chain. They have also increased the abrasion resistance and showed similar or better mechanical and dynamical properties against HA oils. However, resin compounds did not show differences in extraction loss compared to HA oil compounds; instead, they showed increased wet traction.
Keywords
tire; processing aids; liquid rubber; resin; bleeding;
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