Sodium Lignosulfonate 표면처리가 탄산칼슘/폴리프로필렌 복합체에서 탄산칼슘의 분산에 미치는 영향

송준영; 곽영제; 정영진; Junyoung Song; Young-Je Kwark; Youngjin Jeong

Polymer(Korea), Vol.39, No.3, 382-387, May, 2015

DOI10.7317/pk.2015.39.3.382 Export Citation

Sodium Lignosulfonate 표면처리가 탄산칼슘/폴리프로필렌 복합체에서 탄산칼슘의 분산에 미치는 영향

Effect of Sodium Lignosulfonate Treatment on the Dispersion of CaCO3 in CaCo3/Polypropylene Composite

송준영, 곽영제, 정영진^†

숭실대학교 유기신소재파이버공학과

Junyoung Song, Young-Je Kwark, and Youngjin Jeong^†

Department of Organic Materials and Fiber Engineering, Soongsil University, Seoul 156-743, Korea

E-mail:

초록

본 연구에서는 탄산칼슘(CaCO3)의 폴리프로필렌에 분산과 탄산칼슘 입자의 크기가 폴리프로필렌의 결정성에 미치는 영향을 연구하였다. 무기물로 충전된 고분자복합재료는 일반적으로 취성(brittleness)의 문제를 가지고 있으며, 이러한 문제는 주로 무기물입자의 크기와 분산에 의해서 영향을 받는다. 따라서 탄산칼슘의 분산성을 향상시키기 위한 방법으로 sodium lignosulfonate(SLS)의 함량을 달리하면서 탄산칼슘을 전처리하고 이에 따른 분산효과를 고찰 하였다. 그 결과 3 wt%의 SLS로 처리된 탄산칼슘은 미처리 탄산칼슘에 비해 우수한 분산성을 보였으며, 열분석에 서도 빠른 결정형성능을 보였다. 이러한 결정형성능은 탄산칼슘 입자의 크기에 의해서도 영향을 받았으며, 입자의 크기가 커지면 용융과 결정화 과정에서의 엔탈피 출입이 줄어드는 것으로 관찰되었다. 이러한 결과들은 무기물 고 분자복합재료의 취성을 해결할 수 있는 단서를 제공한다고 할 수 있겠다.

The dispersion of calcium carbonate (CaCO3) in polypropylene (PP) and the effect of CaCO3 size on the crystallinity of PP were studied. Polymer composite usually suffers from the brittleness when reinforced with inorganic fillers. The problem is generally related to the size and dispersion of fillers. First, the dispersion was studied for the nanosize CaCO3 with 15~40 nm average diameter. To enhance the dispersibility in PP, the surface of the CaCO3 was treated with sodium lignosulfonate (SLS). CaCO3/PP composites were prepared via melt compounding. The CaCO3 coated with more than 3 wt% SLS was uniformly distributed within the PP matrix, while the uncoated CaCO3 formed aggregated structures in the PP. Even with 30 wt%, the SLS-CaCO3 was well dispersed in the PP matrix. Also, the transition enthalpy of CaCO3/PP increased and the full-width of half maximum of the crystallization peak decreased regardless of SLS coating and size of CaCO3. However, the crystallinity of PP was more influenced by nano CaCO3. These results imply that the nano CaCO3 coated with SLS may reduce the brittleness of polymer composites.

Keywords:calcium carbonate;lignosulfonate (SLS);polypropylene;dispersion;crystallization

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[4] Lyu SG, Kim HY, Sur GS, Polym.(Korea), 20(5), 769 (1996)

[5] Kim GM, Lee DH, Hoffmann B, Kressler J, Stoppelmann G, Polymer, 42(3), 1095 (2001)

[6] Cho JW, Paul DR, Polymer, 42(3), 1083 (2001)

[7] Wang Y, Zhang L, Tang C, Yu D, J. Appl. Polym, 78, 1878 (2000)

[8] Fu X, Qutubuddin S, Polymer, 42(2), 807 (2001)

[9] Akovali G, Akman MA, Polym. Int., 42, 195 (1997)

[10] Khunova V, Hurst J, Janigova I, Smatko V, Polym. Test, 18, 501 (1999)

[11] Zuiderduin WCJ, Westzaan C, Huetink J, Gaymans RJ, Polymer, 44(1), 261 (2003)

[12] Murakami FS, Rodrigues PO, Campos C, Silva M, Cienc. Tecnol. Aliment. Campinas, 27, 658 (2007)

[13] Liu Y, Gao L, Sun J, J. Phys. Chem., 111, 1223 (2007)

[14] Sorrentino L, Berardini F, Capozzoli MR, Amitrano S, Iannace S, J. Appl. Polym. Sci., 113(5), 3360 (2009)

[15] Zuiderduin WCJ, Westzaan C, Huetink J, Gaymans RJ, Polymer, 44(1), 261 (2003)

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[18] Cook M, Harper JF, Adv. Polym. Technol., 17(1), 53 (1998)

[19] Rybnik F, J. Appl. Polym. Sci., 38, 1479 (1989)