Polycarbonate/SAN 블렌드의 열적 및 기계적 성질

박이순; 권영환; 이인태; 김병선

Polymer(Korea), Vol.15, No.1, 21-26, February, 1991

Export Citation

Polycarbonate/SAN 블렌드의 열적 및 기계적 성질

Thermal and Mechanical Properties of Polycarbonate/SAN Blends

박이순, 권영환, 이인태, 김병선

초록

분자량과 acrylonitrile(AN) 함량이 다른 3종류 styrene-acrylonitrile copolymer (SAN-1:M_w=87,000, AN=25%, SAN-2:M_w=138,000, AN=32%, SAN-3:M_w=183,000, AN=30%)와 polycarbonate(PC)의 용융 블렌드를 제조하고 역적, 유변학적 및 기계적 성질을 조사하였다. PC/SAN 블렌드는 DSC 실험 결과 두 개의 T_g를 보였으나 PC의 SAN에 대한 부분적인 상용성은 SAN-1의 경우 SAN-2 및 SAN-3보다 비교적 크게 나타났다. 인장강도, 연신율 및 충격강도등 기계적 및 유변학적 성질에 있어서 PC/SAN 블렌드는 주어진 AN함량 범위에서 SAN의 분자량에 의한 영향이 AN 함량변화에 의한 것보다 상대적으로 크게 나타났다.

Polycarbonate was melt blended with three styrene-acrylonitrile copolymers (SAN-1:M_w=87,000, AN=25%, SAN-2:M_w=138,000, AN=32%, SAN-3:M_w=183,000, AN=30%) and thermal and mechanical properties were studied. PC/SAN blends showed two T_g's from the DSC measurements. The partial miscibility of PC in SAN was relatively higher in SAN-1 than SAN-2 or SAN-3. In these PC/SAN blends the effect of molecular weight of SAN was relatively dominant compared with AN content of SAN in such mechanical properties as ultimate strength, elongation, and notched Izod impact strength. Similar effect was observed in the apparent shear viscosity vs. shear rate curves of PC/SAN blends.

[References]

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[1] Grabowski TS, U.S. Patent, 3,130,177, Borg-Warner (1964)

[2] Bucknall CB, "Toughened Plastics," Applied Science Publishers LTD, London (1977)

[3] Kurauchi T, J. Mater. Sci., 19, 1699 (1984)

[4] Kim WN, Burns CM, Polym. Eng. Sci., 28, 1115 (1988)

[5] Suarez H, Barlow JW, Paul DR, J. Appl. Polym. Sci., 29, 3253 (1984)

[6] Cohen SL, Lazear NR, Dubreuil MP, Plast. Eng., 23 (1982)

[7] Kunori T, Geil PH, J. Macromol. Sci.-Phys., B18, 93 (1980)

[8] Rudin A, Brathwaite NE, Polym. Eng. Sci., 24, 1312 (1984)

[9] Kim WN, Burns CM, J. Appl. Polym. Sci., 34, 945 (1987)

[10] Kim WN, Burns CM, Macromolecules, 20, 1876 (1987)

[11] Min KE, Paul DR, Macromolecules, 20, 2828 (1987)

[12] Groshans VL, Takemori MT, Polym. Eng. Sci., 27, 1006 (1987)

[13] Schmitt RL, Gardella JA, Salvati L, Macromolecules, 19, 648 (1986)

[14] Keitz JD, Barlow JW, Paul DR, J. Appl. Polym. Sci., 29, 3131 (1984)

[15] Stefan D, Williams HL, J. Appl. Polym. Sci., 18, 1451 (1974)

[16] Han CD, "Rheology in Polymer Processing," Academic Press, New York (1976)