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Cure Characteristics and Mechanical Properties of Ternary Accelerator System in NR/BR Compounds  

Kim, Il-Jin (R&D Center, Dongil Rubber Belt Co., Ltd.)
Kim, Wook-Soo (Department of Chemical Engineering, Pusan National University)
Lee, Dong-Hyun (Department of Chemical Engineering, Pusan National University)
Bae, Jong-Woo (Rubber Material Research Division, Korea Institute of footwear & Leather Technology)
Byon, Young-Hoo (R&D Center, Dae Young Special Rubber Co., Ltd.)
Kim, Wonho (Department of Chemical Engineering, Pusan National University)
Publication Information
Korean Chemical Engineering Research / v.47, no.4, 2009 , pp. 403-409 More about this Journal
Abstract
In the 1840s, Goodyear found out sulfur cure system, but cure time was too slow. So producing of rubber product takes a long time. In 1904, Oenslager et al. found that aniline is accelerated sulfur cure system. Recently, many rubber industries needed high yield and good quality. So, many researchers have studied a rubber system with fast vulcanization time and good mechanical properties. In this study, cure characteristics and mechanical properties of NR/BR compounds by accelerator with MBTS(2,2' Dithiobisbenzothiazole), TMTM(Tetramethylthiuram Monosulfide), ZDMC (Zinc dimethyldithiocarbamate), CBS(N-Cyclohexyl benzothiazolyl-2-sulfenamide), DPG(Diphenylguanidine) were evaluated. The results of the study indicate that cure charateristics($t_{90}$: 235 sec, $T_{max}$: 5.77 Nm) and mechanical properties (100, 300% modulus : 2,180, 5.656 Mpa and tear strength: 59.58 kgf/cm) of NR/BR compounds shows efficient acceleration with MBTS 1.5 phr, TMTM 0.5 phr, DPG 0.15phr. This is due to the synergistic activity of ternary accelerator system in rubber vulcanization.
Keywords
Natural Rubber; Butadiene Rubber; Accelerator; Cure Characteristics; Mechanical Properties;
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