메탈로센 수지와 폴리에틸렌 블렌드의 물리적 특성

김기섭; 홍성권; Ki-Seob Kim; Sung-Kwon Hong

Polymer(Korea), Vol.23, No.4, 562-568, July, 1999

Export Citation

메탈로센 수지와 폴리에틸렌 블렌드의 물리적 특성

Characteristics of the Blends of Metallocene Catalyzed Polymer and Polyethylene

김기섭, 홍성권^{1, †}

LG화학
¹충남대학교 고분자공학과

Ki-Seob Kim, and Sung-Kwon Hong^{1, †}

LG Chemical Ltd., Korea
¹Department of Polymer Science and Engineering, Chungnam National University, Taejon, Korea

E-mail:

초록

메탈로센 촉매로 제조된 폴리올레핀은 물성이 뛰어나 범

The metallocene PE(m-PE)/HDPE and m-PE/LDPE blend systems show typical miscibleb behavior in the solid state. The yield strength and elongation decreased with the addition of m-PE, while the tensile strength at break, contrary to the yield strength, increased with the content of m-PE. The melting and crystallization behavior of the blend were dominated by HDPE. The melting temperature and the heat of fusion were linearly decreased with the m-PE content. This result shows that the metallocene PEs have a good low temperature heat-sealibility. The flow rate of blends under large load (21.6 kg) increased with the addition of m-PE, but the flow rate under small loa (2.16 kg and 5 kg) decreased with the m-PE content. The melt flow rate ratio decreased with the m-PE content while the torque value of blends increased. The results indicate that the processibility of m-PE/HDPE or LDPE decreases with m-PE content.

Keywords:metallocene;polymer blend;LDPE;HDPE

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[1] Kaminsky W, "Transition Metal Catalyzed Polymerization; Alkens and Diens," p. 225, Warwood, New York (1983)

[2] Kaminsky W, Angew. Chem.-Int. Edit., 24, 507 (1985)

[3] Ewen JA, Elder MJ, Jones RL, Haspeslagh L, Atwood JL, Bott SG, Robinson K, Macromol. Chem. Macromol. Symp., 48-49, 253 (1991)

[4] Stevens JC, Proceeding of Metcon '93, World Metallocene Conference, p. 157, Houston, Tx, U.S.A. (1993)

[5] Zambelli A, Longo P, Grassi A, Macromolecules, 22, 2186 (1989)

[6] Speed CS, Thrudell BC, Mehta AK, Stehling FC, Society of Plastics Engineers Polyolefins VII International Conference, p. 45, Houston, Tx., U.S.A. (1991)

[7] Modern Plastics International, p. 35, July (1991)

[8] Plastics Technology, p. 29, March (1992)

[9] Chemical Engineering, p. 23, July (1991)

[10] Kashiwa N, "Metallocenes as Promising Catalysts for New Generation of Polyolefins," ed. by K. Soga, p. 25, CMC, Tokyo (1993)

[11] Ready TE, Day RO, Rausch MD, Macromolecules, 26, 5822 (1993)

[12] Giannini U, Makromol. Chem. Suppl., 5, 216 (1981)

[13] Boehm LL, Proc. IUPAC Macromol. Symp., 245 (1982)

[14] Ewen JA, Haspeslagh L, Atwood L, Zhang H, J. Am. Chem. Soc., 109, 6544 (1987)

[15] Ewen JA, Jones R, Razavi A, Ferrara JD, J. Am. Chem. Soc., 110, 6255 (1988)

[16] Kaminsky W, Bark A, Dake I, "Catalyst Olefin Polymerization," eds. by T. Keii and K. Soga, p. 425, Kodansa, Tokyo (1989)

[17] Ha CS, Yang BT, Lee JK, Cho WJ, Polym.(Korea), 15(3), 364 (1991)

[18] Ha CS, Cho WJ, J. Korea Inst. Rubber Ind., 26, 15 (1991)