Nanocomposite polystyrene (PS) foams based on montmorillonite layered silicate (MLS) as nanofillers were prepared using in-situ polymerization of styrene. These nanocomposites were characterized for their thermal and mechanical properties using differential scanning calorimetry (DSC), x-ray diffraction (XRD), dynamic mechanical analyzer (DMA) and scanning electron microscope (SEM). Foamed sample microscopy revealed that the cell size reduced with the increasing amount of nanofiller. The mechanical properties showed a significant increase.
HollM.R., MaM., and KumarV., “The Effect of Additives on Microcellular PVC Foams: Part I – Effect on Processing and Microstructure,”Cellular Polymers, (1998) 17(4) 271–283.
3.
KumarV., WellerJ.E., MaM., and MontecilloR., “The Effect of Additives on Microcellular PVC Foams: Part II – Tensile Behavior,”Cellular Polymers, (1998) 17(5) 350–361.
4.
WilkinsonA.N., FithriyahN.H., StanfordJ.L., and SuckleyD., Structure Development in Flexible Polyurethane Foam-Layered Silicate Nanocomposites. Macromolecular Symposia: Special Issue: Functional and Biological Gels and Networks: Theory and Experiment, (2007) 256(1) 65
5.
NamP.H., MaitiP., OkamotoM., KotakaT., NakayamaT., TakadaM.Foam processing and cellular structure of polypropylene/clay nanocomposites. Polym. Eng. Sci., (2002) 42(9) 1907.
6.
ZengC., HanX., LeeL.J., KoellingK.W., and TomaskoD.L., Polymer–clay nanocomposite foams prepared using carbon dioxide. Adv. Mater. (Weinheim, Germany), (2003) 15(20) 1743.
7.
HanX., ZengC., LeeL.J., KoellingK.W., and TomaskoD.L., Extrusion of polystyrene nanocomposite foams with supercritical CO2. Polym. Eng. Sci., (2003) 43(6) 1261.
8.
LeeD.C., and JangL.W., J. Appl. Polym. Sci., (1996) 611117.
9.
YuanM., TurngL-S., GongS., CaulfieldD., HuntC., and SpindlerR., Study of injection molded microcellular polyamide-6 nanocomposites. Polym. Eng. Sci., (2004) 44(4) 673.
10.
RayS.S., and OkamotoM., New polylactide/layered silicate nanocomposites. Part 6. Melt rheology and foam processing. Macromol. Mater. Eng., (2003) 288(12) 936.
11.
DiY., IannaceS., Di MaioE., and NicolaisL., Poly(lactic acid)/organoclay nanocomposites: thermal, rheological properties and foam processing. J Polym Sci, Part B: Polym. Phys., (2005) 43(6) 689.
12.
MitsunagaM., ItoY., RayS.S., OkamotoM., and HironakoK., Intercalated polycarbonate/clay nanocomposites: Nanostructure control and foam processing. Macromol. Mater. Eng., (2003) 288(7) 543.
13.
CaoX., LeeL.J., WidyaT., and MacoskoC., Structure and properties of polyurethane/clay nanocomposites and foams. 62nd ed. Annual Technical Conference, vol. 2. Society of Plastics Engineers; (2004). p. 1896.
14.
CaoX., LeeL.J., WidyaT., and MacoskoC., Polyurethane/clay nanocomposites foams: processing, structure and properties. Polymer, (2005) 46(3) 775.
15.
LeeM., LeeB-K., and ChoiK-d., Foam compositions of polyvinyl chloride nanocomposites, PCT Int. Appl., Wo, 2004074357; (2004).
16.
ShenJ., and LeeL.J., Effects of carbon nanofibers on polystyrene nanocomposites and foams. 62nd. Annual Technical Conference, vol. 2. Society of Plastics Engineers; (2004). p. 1836.
17.
ShenJ., HanX., and LeeL.J., Nucleation and reinforcement of carbon nanofibers on polystyrene nanocomposite foam. 63rd ed. Annual Technical Conference. Society of Plastics Engineers; (2005). p. 1896.
18.
DiY., IannaceS., Di MaioE., and NicolaisL., Poly(lactic acid)/ organoclay nanocomposites: thermal, rheological properties and foam processing, J. Polym. Sci., Part B: Polym Phys., (2005) 43(6) 689.
19.
GongF., FengM., ZhaoC., ZhangS., and YangM., Particle configuration and mechanical properties of poly(vinyl chloride)/ montmorillonite nanocomposites via in situ suspension polymerization. Polym Test., (2004) 23(7) 847.
20.
StraussW., Saturation and Foaming of Thermoplastic Nanocomposites Using Supercritical CO2, MS Thesis, University of North Texas (2004).
21.
Standard Test Method for Apparent Density of Rigid Cellular Plastics ASTM (D1622-98).
22.
Standard Test Method for Density of Plastics by Density-Gradient Technique ASTM (D1505-98).
23.
TakiKentaro, NittaKouei, KiharaShin-Ichi, and MasahiroOhshima, CO2 Foaming of Poly(ethylene glycol)/Polystyrene Blends: Relationship of the Blend Morphology, CO2 Mass Transfer, and Cellular Structure.
24.
KumarV., and WellerJ., Production of Microcellular Polycarbonate Using Carbon Dioxide for Bubble Nucleation. Journal of Engineering for Industry, (November 1994), Vol. 116/413
