[논문]Vulcanizate Structures of NR Compounds with Silica and Carbon Black Binary Filler Systems at Different Curing Temperatures

Kim, Il Jin; Kim, Donghyuk; Ahn, Byungkyu; Lee, Hyung Jae; Kim, Hak Joo; Kim, Wonho

doi:10.7473/ec.2021.56.1.20

Vulcanizate Structures of NR Compounds with Silica and Carbon Black Binary Filler Systems at Different Curing Temperatures 원문보기

Elastomers and composites = 엘라스토머 및 콤포지트, v.56 no.1, 2021년, pp.20 - 31

Kim, Il Jin (Global Quality Management Team, Hankooktire & Technology Co., Ltd HQ) , Kim, Donghyuk (Department of Chemical Engineering, Pusan National University) , Ahn, Byungkyu (Wet Braking Innovation TFT, Hankooktire & Technology Co., Ltd R&D Center) , Lee, Hyung Jae (Global Quality Management Team, Hankooktire & Technology Co., Ltd HQ) , Kim, Hak Joo (Global Quality Management Team, Hankooktire & Technology Co., Ltd HQ) , Kim, Wonho (Department of Chemical Engineering, Pusan National University)

Abstract ▼ AI-Helper

There is an increasing demand for the rolling resistance reduction in truck bus radial (TBR) tires in the tire industry. In TBR tires, natural rubber is used as a base polymer to prevent wear and satisfy required physical properties (cut and chip). A binary filler system (silica and carbon black) is used to balance the durability of the tire and rolling resistance performance. In this study, natural rubber (NR) compounds applied with a binary filler system were manufactured at different cure temperatures for vulcanizate structure analysis. The vulcanizate structures were categorized into carbon black bound rubber, silica silane rubber network, and chemical crosslink density by sulfur. Regardless of the cure temperature, the cross-link density per unit content of carbon black had a greater effect on the properties than silica due to affinity with NR. The relationship analysis between the mechanical, viscoelastic properties with vulcanizate structure could be a guideline for manufacturing practical TBR compounds.

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표/그림 (17)

그림 Figure 1. Vulcanizate structures of carbon black and silica binary filler system.
표 Table 1. Experimental Formulations for Compounds with Carbon Black and Silica Binary Fillers (unit : phr)
표 Table 2. Compounding Procedures for the NR Binary Filler Compounds
그림 Figure 2. Flowchart of the analysis on vulcanizate structures using the swelling test and Flory–Rehner equation.
그림 Figure 3. Cure curve of T-3 compound at different cure temperature; 150, 160 and 170℃.
표 Table 3. Cure Characteristics of the T-3 Compound at Different Cure Temperature
그림 Figure 4. Cure characteristics of compounds with carbon black and silica binary filler system. (a) carbon black contents; 60phr, silica contents; 15, 30, and 45phr, (b) silica contents; 30phr, carbon black contents; 15, 45, and 60phr.
그림 Figure 5. Analysis of vulcanizate structures of the T-3 compound according to filler variates at different cure temperature; 150, 160, and 170℃.
표 Table 4. Vulcanizates Structure of the NR Binary Compound (T-3; Carbon Black 60phr, silica 30phr) at Different Cure Temperature
그림 Figure 6. Decrease rate of crosslink density of the NR binary filler compounds (T-3) according to the cure temperature.
표 Table 5. Crosslink Density Per One phr of Filler by Different Cure Temperature
그림 Figure 7. Change of mechanical properties change of the NR binary filler compounds by different cure temperature; (a) 100% modulus and (b) 300% modulus.
그림 Figure 8. Stress–strain curves of the vulcanizates by different cure temperature; (a) T-1,2,3, (b) T-3,4,5, and (c) T-3,6,7.
표 Table 6. Mechanical Properties Per One phr of Filler by Different Cure Temperature
그림 Figure 9. Change of viscoelasticity properties of the NR binary filler compounds by different cure temperature; (a) tan ẟ at 60℃, (b) G" at 0℃, and (c) G* at −20℃
표 Table 7. Viscoelasticity Properties Per One phr of Filler by Different Cure Temperature
표 Table 8. Effect of Silica-silane–rubber Network (SSRN) or Carbon Black Bound Rubber (CBBR) on the Performance Change of Rubber Compounds with Increasing Cure Temperature

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