Study on the Structure,Thermal Properties,and Mechanical Properties of PMMA-grafted SBR/Clay Nanocomposites

Abstract

PMMA-grafted SBR/clay nanocomposites (PM-g S/C nano) were prepared by emulsion polymerization. In this polymerization process, it simultaneously contained MMA monomer grafting on to SBR polymer chains and polymer chains intercalating into clay layers. The grafting group can give the compatibility of clay with rubber, and improve the dispersion of clay in the rubber matrix. To compare with PM-g S/C nano, SBR/clay nanocomposites (S/C nano) and neat SBR were also prepared. The nanocomposites were characterized by using infrared spectra, X-ray diffraction, thermogravimetric analysis, dynamic mechanical analysis, and tensile tester. The results showed that the clay could be well dispersed in the rubber matrix. The nanocomposites showed good thermal stability. The T_g of the nanocomposites were lower than that of the neat SBR, and decreased with the increasing clay concentration. The storage modulus of the nanocomposites was higher than that of neat SBR. Compared to S/C nano and neat SBR, the PM-g S/C nano had substantially higher mechanical properties.

Keywords

SBR latex pristine clay grafting exfoliation nanocomposites.

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References

Okada, A. , Kawasumi, M. , Kurauchi, T. and Kamigaito, O. ( 1987). Synthesis and Characterization of a Nylon 6-Clay Hybrid , Polymer Preprints, 28: 447-448.

Okada, A. and Usuki, A. ( 1995). The Chemistry of Polymer-Clay Hybrids, Materials Science and Engineering, 3: 109-115.

Arroyo, M. , Lopez-Manchado, M.A. and Herrero, B. ( 2003). Organo-montmorillonite as Substitute of Carbon Black in Natural Rubber Compounds, Polymer, 44: 2447-2453.

Buggy, M. , Bradley, G. and Sullivan, A. ( 2005). Polymer-filler Interactions in Kaolin/ny6,6 Composites Containing a Silane Coupling Agent, Composites Part A, 36: 437-442.

Dai, J.C. and Huang, J.T. (1999). Surface Modification of Clays and Clay-rubber Composite, Journal of Applied Polymer Science, 15: 51-65.

Jia, Q.-X. , Wu, Y.-P. , Xu , Y.-L. , Mao , H.-H. and Zhang, L.-Q. (2006). Combining In-Situ Organic Modification of Montmorillonite and the Latex Compounding Method to Prepare High - Performance Rubber - Montmorillonite Nanocomposites , Macromolecular Materials Engineering, 291: 218-226.

Egret, H. , Dimonie, V.L. , Sudol, E.D. , Klein, A. and El-Aasser, M.S. ( 2001). Characterization of Grafting in the Emulsion Polymerization of Vinyl Acetate Using Poly(vinyl alcohol) as Stabilizer, Journal of Applied Polymer Science, 82: 1739-1747.

Pham, T.T.B. , Fellows, C.M. and Gilbert, R.G. ( 2004). Grafting of Dodecyl Methacrylate onto Hydroxylated Polybutadiene by Miniemulsion Polymerization , Journal of Applied Polymer Science, 42: 3404-3416.

Odian, G.G. ( 1991). Principles of Polymerization, 3rd edn, pp. 715-721, Wiley, New York .

10.

Sukpirom, N. and Lerner, M.M. ( 2002). Rapid Exfoliation of a Layered Titanate by Ultrasonic Processing, Polymeric Materials: Science and Engineering, 333: 218-222.

11.

Theng, B.K.G. ( 1974). The Chemistry of Clay Organic Reaction, Wiley, New York.

12.

Wang, J.W. , Kong, X.H. , Cheng, L. and He, Y. ( 2008). Influence of Clay Concentration on the Morphology and Properties Clay-epoxy Nanocomposites Prepared by In-situ Polymerization Under Ultrasonication, Journal of University of Science and Technology Beijing, 15: 320-322.

13.

Meng, J. and Hu, X. ( 2004). Synthesis and Exfoliation of Bismaleeimide-Organoclay Nanocomposites, Polymer, 45: 9011-9018.

14.

Sukpirom, N. and Lerner, M.M. ( 2002). Rapid Exfoliation of a Layered Titanate by Ultrasonic Processing, Polymeric Materials: Science and Engineering, 333: 218-222.

15.

Zulfiqar, S. , Lieberwirth, I. , Ahmad , Z. and Sarwar, M. (2008). Influence of Oligomerically Modified Reactive Montmorillonite on Properties of Aromatic Polyamide-clay Nanocomposites, Acta Materialia , 56: 4905-4912.

16.

Wang, J. and Qin, S. ( 2007). Study on the Thermal and Mechanical Properties of Epoxy-Nanoclay Composites: The Effect of Ultrasonic Stirring time, Materials Letters, 61: 4222-4224.

17.

Guo, B.-C. , Wang, L. and Jia , D.-M. (2004). Novel Preparation of NR/MMT Nanocomposites with Pristine Montmorillonite, In: Symposium of International Rubber Conference, pp. 232-235.

18.

Liao, M.Y. , Shan, W. , Zhu, J.D. , Li, Y. and Xu, H.D. ( 2005). Structure and Properties of Rubber/Organic Montmorillonite Nanocomposites Prepared by In Situ Anionic Intercalation Polymerization, Journal of Applied Polymer Science, 43: 1344-1353.