고무개질 열가소성 수지의 선형점탄성

신귀숙; 김영진; 김창기; 김준형; 김병규

Polymer(Korea), Vol.16, No.2, 160-165, March, 1992

Export Citation

고무개질 열가소성 수지의 선형점탄성

Linear Viscoelastic Properties of Rubber Modified Thermoplastic

신귀숙, 김영진, 김창기, 김준형, 김병규

초록

SAN(styrene-co-acrylonitrile)과 SAN-graft-polybutadiene(PB) (g-ABS)을 Brabender Plasticorder에서 용융 블렌드 하여, 이들의 용응상태 및 고체 상태에서의 선형점탄성 거동을 RDS rheometer로 측정하였다. SAN에 g-ABS가 첨가됨에 따라 초기점도가 현저히 증가하였으며. 특히 g-ABS≥20wt%에서 항복거동을 나타내었고, 높은 진동주파수 범위에서는 의소성이 뚜렷하게 증가하였다. 또한 SAN/g-ABS 블렌드에서 SAN의 함량이 증가함에 따라 g-ABS의 lower T_g는 일률적으로 감소하는 경향을, higher T_g는 다소 증가하는 경향을 보였으며, 이를 SAN 첨가에 따른 g-ABS의 graft SAN-PB 상분리로 해석하였다.

Melt blends of SAN(styrene-co-acrylonitrile) with SAN-graft-polybutadiene( PB) rubber were prepared using a Brabender Plasticorder. Melt state as well as solid state linear viscoelastic properties were measured using an RDS rheometer. With rubber addition, melt viscosity increased drastically, with yield at ≥20wt% rubber content, together with the increased pseudoplasticity at high frequencies. The lower glass transion temperature (T_g) and the higher T_g of g-ABS were respectively decreased and increased with narrowed transition zone in the blends. This phenomenon was interpreted in terms of graft SAN-PB phase separation.

[References]

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[1] Munstedt H, Polym. Eng. Sci., 21, 259 (1981)

[2] Greco R, Mancerella C, Martuscelli E, Ragosta G, Polym. Eng. Sci., 28, 1922 (1987)

[3] Greco R, Mancerella C, Martuscelli E, Ragosta G, Polym. Eng. Sci., 28, 1929 (1987)

[4] Coppola F, Geco R, Murtuscelli E, Polymer, 28, 47 (1987)

[5] vanGisbergen JGM, Meijer HEH, Lemstra PJ, Polymer, 30, 2153 (1989)

[6] Wu S, Polymer, 26, 1855 (1985)

[7] Borggreve RJM, Gaymans RJ, Schuijer J, Polymer, 28, 1489 (1987)

[8] Borggreve RJM, Gaymans RJ, Polymer, 30, 63 (1989)

[9] Fowler ME, Keskkula H, Paul DR, Polymer, 28, 1703 (1987)

[10] Fowler ME, Keskkula H, Paul DR, J. Appl. Polym. Sci., 35, 1563 (1988)

[11] Donald AM, Kramer EJ, J. Mater. Sci., 17, 1765 (1982)

[12] White JM, "Principle of Polymer Engineering Rheology," Wiley Interscience, New York (1990)

[13] Aoki Y, Nihon Reoroji Gakkaishi, 7, 20 (1979)

[14] Bird RB, Armstrong RC, Hassager O, "Dynamics of Polymeric Liquids," Vol. 1, Wiley, New York (1987)

[15] Vinogradov GV, Malkin AY, "Rheology of Polymers," Spring-Verlag, New York (1980)

[16] Tadmor Z, Gogos CG, "Principles of Polymer Processing," Wiley, New York (1979)

[17] Han CD, "Multiphase Flow in Polymer Processing," Academic, New York (1981)

[18] Utracki LA, Current Topics in Polymer Science, Vol. 2, Hanser, New York (1987)

[19] VanOene H, J. Colloid Interface Sci., 40, 448 (1972)

[20] Utracki LA, J. Elastomer Plast., 18, 177 (1986)

[21] Ferry JD, "Viscoelastic Properties of Polymers," 2nd ed., Wiley, New York (1980)

[22] Kim BK, Lee YH, Jeong HM, J. Appl. Polym. Sci., 40, 1805 (1990)

[23] Paul DR, Newman S, "Polymer Blends," Vol. 1, Academic Press, New York (1978)

[24] Rutkowska M, Macromolecules, 17, 821 (1984)