Polystyrene organoclay nanocomposites

S. Bruzaud, Y. Grohens, S. Ilinca, and J.-F. Carpentier, Syndiotactic polystyrene/ organoclay nanocomposites Synthesis via in situ coordination-insertion polymerization and preliminary characterization. Macromolecular Materials and Engineering, 290 (2005), 1106-14. 

TABLE 8.2 TGA Data for Polystyrene-Organoclay Nanocomposites Containing Various Aromatic Phosphates"... 

Y. Li and H. Ishida. A study of morphology and intercalation kinetics of polystyrene-organoclay nanocomposites. Macromolecules, 38 15 (2005),... 

Park, C. I., Choi, W. M., Kim, M. H., Park, O. O. Thermal and mechanical properties of syndiotactic polystyrene/organoclay nanocomposites with different microstructures. J. Polym. Sci Part B Polym. Phys., 42,1685-1693 (2004). 

El-Mabrouk, K., Belaiche, M., and Bousmina, M. (2006) Phase separation of polystyrene/poly(vinylmethyl ether)/ organoclay nanocomposites. J. Nanosci. Nanotedmol., 6, 472-482. 

Hwang et al. [113] synthesized via in situ polymerization high-impact polystyrene (HlPS)/organically modifled montmorillonite (organoclay) nanocomposites. X-ray diffraction and TEM experiments revealed that intercalation of polymer chains into silicate layers was achieved, and the addition of nanoclay led to an increase in the size of the robber domain in the composites. In comparison with neat HIPS, they found that the HIPS/organoclay nanocomposites exhibited improved thermal stabiHly as well as an increase in both the complex viscosity and storage modulus, and they may have been influenced by a competition between the incorporation of clay and the decrease in the molecular weight of the polymer matrix. 

Polystyrene/clay nanocomposites from thermally stable organoclays... 

J. U. Calderon, B. Lennox, and M. R. Kamal, Polystyrene/phosphonium organoclay nanocomposites by melt compounding. International Polymer Processing, 23 (2008), 119-28. 

Rheology of Organoclay Nanocomposites Based on End-Functionalized Polystyrene... 

Several other studies have been reported on the preparation, via mixing, of organoclay nanocomposites based on various bloek eopolymers ineluding SI diblock copolymers [45 8], SIS tribloek copolymer [49], polystyrene-fetocA -... 

In this section we present the recent study of Zha et al. [7], who prepared organoclay nanocomposites based on polystyrene- tocfc-poly(2-vinylpyridine) (S2VP diblock)... 

Poly(styrene-fc-butadiene) copolymer-clay nanocomposites were prepared from dioctadecyldimethyl ammonium-exchanged MMT via direct melt intercalation [91]. While the identical mixing of copolymer with pristine montmorillonite showed no intercalation, the organoclay expanded from 41 to 46 A, indicating a monolayer intercalation. The nanocomposites showed an increase in storage modulus with increasing loading. In addition, the Tg for the polystyrene block domain increased with clay content, whereas the polybutadiene block Tg remained nearly constant. 

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