[논문]Reinforcing Performance of Networked Silicas in Silica-filled Chloroprene Rubber Compounds

Ryu, Changseok; Yang, Jae-Kyoung; Park, Wonhyeong; Kim, Sun Jung; Kim, Doil; Seo, Gon; Kim, Wook-Soo; Ahn, Ki Woong; Kim, Beak Hwan

doi:10.7473/ec.2019.54.1.40

Reinforcing Performance of Networked Silicas in Silica-filled Chloroprene Rubber Compounds 원문보기

Elastomers and composites = 엘라스토머 및 콤포지트, v.54 no.1, 2019년, pp.40 - 53

Ryu, Changseok (Mirae SI) , Yang, Jae-Kyoung (Mirae SI) , Park, Wonhyeong (Mirae SI) , Kim, Sun Jung (Mirae SI) , Kim, Doil (Mirae SI) , Seo, Gon (Mirae SI) , Kim, Wook-Soo (Nexen Tire) , Ahn, Ki Woong (Nexen Tire) , Kim, Beak Hwan (Nexen Tire)

Abstract ▼ AI-Helper

The physical properties of chloroprene rubber (CR) compounds reinforced with networked silicas were investigated by comparing them to those reinforced with conventional silica to observe the effect of the organic connection bonds combining silica particles on their cure, tensile, and aging performance. The introduction of networked silica to CR increase in silica content to 80 phr in rubber, while the content of conventional silica was limited to 60 phr. The CR compounds reinforced with networked silica showed higher resistance to combustion. The gradual increases in delta torque, Mooney viscosity, and modulus of silica-filled CR compounds with silica content were mainly attributed to the specific interaction between the chlorine atoms of CR and the hydroxyl groups of silica. The CR compounds reinforced with networked silica showed low compression set and heat build-up and maintained their high modulus even after thermal, oil, and ozone aging.

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표/그림 (15)

표 Table 1. Chemical Compositions of Silica-Filled CR Compounds Prepared
그림 Figure 2. Photos of rubber sheets of silica-filled CR compounds.
그림 Figure 1. TG curves of silicas used.
그림 Figure 3. SEM images of CR-MS1 compounds with different silica contents: (A) 20 phr, (B) 40 phr, (C) 60 phr, and (D) 80 phr. The images were obtained from the compounds after sputtering with plasma to remove soft rubber.
그림 Figure 4. SEM images of CR-GR compounds with different silica contents: (A) 20 phr, (B) 40 phr, and (C) 60 phr. The images were obtained from the compounds after sputtering with plasma to remove soft rubber.
그림 Figure 5. TG (A) and DTA (B) curves of CR compounds reinforced with different silicas of 60 phr recorded in nitrogen.
그림 Figure 6. TG curves of CR-GR (A) and CR-MS3 (B) and DTA curves of CR-GR (C) and CR-MS3 (D) compounds recorded in air.
그림 Figure 7. Rheocurves of CR-GR (A), CR-MS2 (B), and CR-MS3 (C) compounds with different silica contents.
그림 Figure 8. Variations of (A) τ_min and (B) Δτ of silica-filled CR compounds with their silica content.
그림 Figure 9. Variations of (A) Mooney viscosity and (B) Payne effect of silica-filled CR compounds with their silica content.
그림 Figure 10. Variations of (A) tear and (B) tensile strengths of silica-filled CR compounds with their silica content.
그림 Figure 11. Variations of (A) M-200% and (B) E.B. of silica-filled CR compounds with their silica content.
그림 Figure 12. Variations of (A) HBU and (B) compression set of silica-filled CR compounds with their silica content.
그림 Figure 13. Changes in moduli of the CR compounds reinforced with 60 phr silica after (A) thermal, (B) oil, and (C) ozone aging.
그림 Figure 14. Changes in tear and tensile strengths of CR compounds reinforced with 60 phr silica after (A) thermal, (B) oil, and (C) ozone aging.

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대상 데이터

The CR used in this study was Baypren® 210 rubber manufactured by Lanxess (Germany) with viscosity [ML (1+4) @ 100℃] of 43 ± 4 and density of 1.23 g·cm−3.

이론/모형

The heat build-up (HBU) of a sample with repeated strokes was measured using GABO® 200 (BF Goodrich) following the procedure described in ASTM D623.

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