Browse > Article

Effect of the Starch Content on the Silicate Dispersion and Rheological Properties of Polypropylene/Starch/Silicate Composites  

Kim, Youn Cheol (Major in Polymer Engineering, Kongju National University)
Lee, Chang-Young (Department of Environmental Engineering, Kongju National University)
Publication Information
Korean Chemical Engineering Research / v.46, no.1, 2008 , pp. 106-111 More about this Journal
Abstract
Polypropylene (PP)/corn starch master batch (starch-MB)/silicate composites with different corn starch compositions of 10, 20, 30, 40 and 50 were prepared by melt compounding at $200^{\circ}C$, using lab scale Brabender mixer. The content of silicate was fixed at 5 wt%. The composition of starch-MB in composites was confirmed by the existence of hydroxy group and peak intensity in fourier-transform-infrared (FT-IR) spectrum. The thermal properties of the PP/starch-MB/silicate composites were investigated by differential scanning calorimetry (DSC), and thermogravimetric analyzer (TGA). There was no district change in melting temperature, and TGA curve indicates a decrease in degradation temperature with the increase of starch-MB content. The silicate dispersion of the composites was measured by X-ray diffraction (XRD) and transmission electron microscope (TEM). The degree of silicate dispersion in PP/starch-MB/silicate composites depended on the content of starch-MB. There was detectable change in d-spacing and peak intensity of the composite when the content of starch-MB was higher than 20 wt%. The rheological behavior of the composites was explained by both shear thinning effect and elastic property with the starch-MB amount. These effects were remarkable when the content of starch-MB was higher than 20 wt%. These were confirmed by an oscillatory viscometer at $200^{\circ}C$.
Keywords
PP/Starch/Silicate Composite; Starch Addition; Silicate Dispersion; Rheological Property;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Nam, P. H., Maiti, P., Okamoto, M., Kotaka, T., Hasegawa, N. and Usuki, A., "A Hierarchical Structure and Properties of Intercalated Polypropylene/clay Nanocomposites," Polymer, 42, 9633- 9640(2001).   DOI   ScienceOn
2 Kim, Y. C., "Effect of Maleated Polyethylene on the Crystallization Behavior of LLDPE/clay Nanocomposites," Polym. J., 38(3), 250-257(2006).   DOI   ScienceOn
3 Lee, S. H., Kim, D. J., Kim, J. H., Lee, D. H., Sim, S. J., Nam, J. D., Kye, H. S. and Lee, Y. K., "Compatibilization and Properties of Modified Starch-Poly(latic acid) Blend," Polymer(Korea), 28(6), 519-523(2004).
4 Jang, W. Y., Shin, B. Y., Lee, T. J. and Narayan, R., "Thermal Properties and Morphology of Biodegradable PLA/Starch Compatibilized Blends," J. Ind. Eng. Chem., 13(3), 457-464(2007).
5 Molenaar, J. and Koopmans, R. J., "Modeling Polymer Melt-flow Instabilities," J. Rheol., 38(1), 99-109(1994).   DOI   ScienceOn
6 Lele, A., Mackley, M. and Galgali, G. and Ramesh, C., "In Situ Rheo-x-ray Investigation of Flow-induced Orientation in Layered Silicate-syndiotatic Polypropylene Nanocomposite Melt, " J. Rheol., 46(5), 1091-1110(2002).   DOI   ScienceOn
7 Li, J., Zhou, C. and Gang, W., "Study on Nonisothermal Crystallization of Maleic Anhydride Grafted Polypropylene/montmorillonite Nanocomposite," Polym. Test., 22, 217-223(2003).   DOI   ScienceOn
8 Wang, K. H., Choi, M. H., Koo, C. M., Choi, Y. S. and Chung, I. J., "Synthesis and Characterization of Maleated Polyethylene/ clay Nanocomposites," Polymer, 42, 9819-9826(2001).   DOI   ScienceOn
9 Barikani, M. and Mohammadi, M., "Synthesis and Characterization of Starch-modified Polyurethane," Carbohydrate Polymers, 68, 773-780(2007).   DOI   ScienceOn
10 Liu, X. and Wu, Q., "PP/clay Nanocomposites Prepared By Grafting-melt Intercalation," Polymer, 42, 10013-10019(2001).   DOI   ScienceOn
11 Chung, M. S., Lee, W. H., You, Y. S., Kim, H. Y., Park, K. M. and Lee, S. Y., "Assessment and Applications of Multi-degradable Polyethylene Films as Packaging Materials," Food Sci. Biotech., 15(1), 5-12(2006).   과학기술학회마을
12 Lim, D. L. and Im, S. S., "Biodegradable Polyolefin Composites Containing Starches", J. Korean Ind. & Eng. Chem., 3(3), 361-370 (1992).
13 Baker, W. E., Rudin, A., Schreiber, H. P. and El-Kindi, M., "The Effect of Processing on Rheological and Molecular Characteristics of a Low Density Polyethylene", Polym. Eng. Sci., 33(7), 377- 382(1993).   DOI   ScienceOn
14 Zheng, L., Farris, R. J. and Coughlin, E. B., "Novel Polyofefin Nanocomposites: Synthesis and Characterizations of Metallocenecatalyzed Polyolefin Polyhedral Oligomeric Silsesquioxane Copolymers," Macromolecules, 34(23), 8034-8039(2001).   DOI   ScienceOn
15 Wange, S. Q. and Drda, P. A., "Superfluid-Like Stick-Slip Transition in Capillary Flow of Linear Polyethylene Melts," Macromolecules, 29(7), 2627-2632(1996).   DOI   ScienceOn
16 Kim, Y. C., Lee, S. J., Kim, J. C. and Cho, H., "Effects of Maleated Polyethylene on the Rheological Properties of LLDPE/Clay Nanocomposites," Polym. J., 37(3), 206-211(2005).   DOI   ScienceOn
17 Heinemann, J., Reichert, P., Thomann, R. and Mulhaupt, R., "Polyolefin Nanocomoposites Formed by Melt Compounding and Transition Metal Catalyzed Ethene Homo- and Copolymerization in the Presence of Layered Silicates", Macro. Rapid Commun., 20(8), 423-430(1999).   DOI