NR/BR 및 NR/S-SBR 블렌드의 가황과 물리적 기계적 물성

김완영; 이대수; 김윤섭; 이범철; 오세철; 라창운

Polymer(Korea), Vol.14, No.4, 346-352, August, 1990

Export Citation

NR/BR 및 NR/S-SBR 블렌드의 가황과 물리적 기계적 물성

Vulcanization and Physico-Mechanical Properties of NR/BR and NR/S-SBR Blends

김완영, 이대수, 김윤섭, 이범철, 오세철, 라창운

초록

카본블랙을 포함한 NR/BR(natural rubber/butadiene rubber) 및 NR/S-SBR (solution polymerized-styrene butadiene rubber) 블렌드의 조성에 따른 가황 특성 및 물리적·기계적 물성을 실험적으로 조사하였다. BR 및 S-SBR의 함량이 증가할수록 조사한 고무 블렌드의 가황 속도는 느려지나 가교 밀도는 증가하였다. BR 및 S-SBR 함량이 증가할수록 NR/BR 및 NR/S-SBR 블렌드의 내마모성, 반발탄성, tan δ(0℃ 및 60℃), 발열에 의한 온도 상승 등이 증가한 반면 인장탄성율은 감소하였다. 이러한 기계적 물성의 변화를 블렌드에 포함된 고무들의 종류와 가교 밀도의 차이로 해석하였다. NR/S-SBR은 NR/BR에 비하여 내마모성 및 반발탄성은 낮게 나타났으나 발열에 의한 온도상승 및 60℃에서의 tan δ도 적게 관찰되어 타이어에 쓰이는 경우 회전저항 측면에서 유리할 것으로 예측되었다.

Vulcanization and physico-mechanical properties of NR/BR (natural rubber/butadiene rubber) and NR/S-SBR (solution polymerized-styrene butadiene rubber) blends containing carbon black were investigated experimentally. The vulcanization of the blend was retarded and the crosslink density of the blend was increased as the content of BR or S-SBR in the blend was increased. Wear resistance, rebound, heat build-up, and tan δ(0℃ and 60℃)of the blend were increased but tensile modulus decreased with the content of BR or S-SBR. It was interpreted that the mechanical properties were affected by the type of rubber and the crosslink density of the blend. Wear resistance and rebound of NR/BR were superior to those of NR/S-SBR while heat build-up and tan δof NR/BR were less than those of NR/S-SBR. It is expected that NR/S-SBR blend may show less rolling resistance than NR/BR in tires.

[References]

Leblanc JL, Plastics Rubber Process. Appl., 2, 361 (1982)
Blow CM, "Rubber Technology and Manufacture," Chapter 4, Butterworth Scientific, London (1982)
Nordsiek KH, Kautsch. Gummi Kunstst., 38, 178 (1985)
Elliot DJ, NR Technol., 17, 1 (1986)
Morrell SH, "Rubber Technology and Manufacture," Chapter 5, Butterworth Scientific, London (1982)
McDonel ET, Baranwall KC, Andries JC, "Polymer Blends," D.R. Paul and S. Newman ed., Vol. 2, Chap. 19, Academic Press, New York (1978)
Blow CM, Polymer, 14, 309 (1973)
Hess WM, Vegvari PC, Swor RA, Rubber Chem. Technol., 58, 350 (1985)
Southern E, "Developments in Rubber Technology," A Whealan, and K.S. Lee ed., Vol. 1, Chap. 8, Applied Science Publishers, London (1985)
Blumel H, Rubber Chem. Technol., 37, 408 (1964)

[Referenced By]

[1] Leblanc JL, Plastics Rubber Process. Appl., 2, 361 (1982)

[2] Blow CM, "Rubber Technology and Manufacture," Chapter 4, Butterworth Scientific, London (1982)

[3] Nordsiek KH, Kautsch. Gummi Kunstst., 38, 178 (1985)

[4] Elliot DJ, NR Technol., 17, 1 (1986)

[5] Morrell SH, "Rubber Technology and Manufacture," Chapter 5, Butterworth Scientific, London (1982)

[6] McDonel ET, Baranwall KC, Andries JC, "Polymer Blends," D.R. Paul and S. Newman ed., Vol. 2, Chap. 19, Academic Press, New York (1978)

[7] Blow CM, Polymer, 14, 309 (1973)

[8] Hess WM, Vegvari PC, Swor RA, Rubber Chem. Technol., 58, 350 (1985)

[9] Southern E, "Developments in Rubber Technology," A Whealan, and K.S. Lee ed., Vol. 1, Chap. 8, Applied Science Publishers, London (1985)

[10] Blumel H, Rubber Chem. Technol., 37, 408 (1964)