[논문]Effect of Silane and Sulfur Variation on the Vulcanizate Structure of Silica-Filled Styrene-Butadiene Rubber Compounds

Han, Sangwook; Kim, Donghyuk; Kim, Seongrae; Kim, Jongmyoung; Mun, Dalyong; Morita, Koichi; Kim, Wonho

doi:10.7473/ec.2021.56.1.32

Effect of Silane and Sulfur Variation on the Vulcanizate Structure of Silica-Filled Styrene-Butadiene Rubber Compounds 원문보기

Elastomers and composites = 엘라스토머 및 콤포지트, v.56 no.1, 2021년, pp.32 - 42

Han, Sangwook (Precedent Research Business Sector, Future Technology Research Institute) , Kim, Donghyuk (School of Chemical Engineering, Pusan National University) , Kim, Seongrae (Precedent Research Business Sector, Future Technology Research Institute) , Kim, Jongmyoung (Precedent Research Business Sector, Future Technology Research Institute) , Mun, Dalyong (Precedent Research Business Sector, Future Technology Research Institute) , Morita, Koichi (Precedent Research Business Sector, Future Technology Research Institute) , Kim, Wonho (Precedent Research Business Sector, Future Technology Research Institute)

Abstract ▼ AI-Helper

The vulcanizate structure of silica-filled compounds is affected by the filler-rubber interaction (FRI) due to the silica-rubber coupling reaction and the chemical crosslink density (CCD) of the matrix rubber. In this study, the vulcanizate structure changes of silica-filled compounds according to the silane and sulfur variation were quantitatively analyzed using the Flory-Rehner and Kraus equations. In efficiency vulcanization (EV) conditions with low sulfur content, FRI increased when the bis-[3-(triethoxysilyl)propyl]tetrasulfide (TESPT) content increased, and the CCD clearly decreased. By contrast, in semi-EV conditions with high sulfur content, as TESPT content increased, the FRI increased the same way EV conditions, but the CCD was unchanged. Based on these results, it was confirmed that FRI of the silica-filled compounds increased as TESPT content increased, but CCD decreased or retained similar values according to the vulcanization system, indicating that the formation reaction of FRI was preferred over CCD.

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표/그림 (15)

그림 Figure 1. Vulcanizate structure of silica-filled compounds.
그림 Figure 2. Suggested mechanisms of vulcanization and silica–rubber coupling.
표 Table 1. Formulation of Compounds (unit: phr)
표 Table 2. Mixing Procedure
그림 Figure 3. Storage modulus trend by increasing strain.
표 Table 3. Storage Modulus of Unvulcanized Compounds
표 Table 4. Cure Characteristics of Compounds
그림 Figure 4. Vulcanizate structures by the amount of silane and curing systems.
표 Table 5. Vulcanizate Structure of Various Vulcanizates
그림 Figure 5. Stress–strain curves of the vulcanizates.
그림 Figure 6. Abrasion weight loss of the vulcanizates.
표 Table 6. Mechanical Properties of the Vulcanizates
그림 Figure 7. Tan δ curves of the vulcanizates.
표 Table 7. Viscoelastic Properties of the Vulcanizates
표 Table 8. Peak Values of Friction Coefficient μ for the Vulcanizates from the Rotational Traction Measuring System

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