Silicates polyester layered

Maid P, Batt CA, Giannelis EP (2007) New biodegradable polyhydroxybutyratedayered silicate nanocomposites. Biomacromolecules 8 3393-3400 Maid P, Batt CA, Giannelis EP (2003) Biodegradable polyester/layered silicate nanocomposites. Mater Res Soc Symp Proc 740(15) 3... 

Lepoittevin B, Pantoustier N, Alexandre M, Calberg C, Jerome R, Dubois P (2002a) Layered silicate/polyester nanohybrids by controlled ring-opening polymerization. Macromol Symp... 

Suh, D.J. Lim, Y.T. Park, 0.0. The property and formation mechanism of unsaturated polyester-layered silicate nanocomposite depending on the fabrication methods. Polymer 2000, 41, 8557-8563. 

P. (2003) in Biodegradable Polymers and Plastics. New Aliphatic Polyester Layered-Silicate Nanocomposites... 

Miyagawa, H., Mohanty, A.K., Burgueno, R., Drzal, L.T., Misra, M., 2006. Characterization and thermophysical properties of unsaturated polyester-layered silicate nanocomposites. Journal of Nanoscience and Nanotechnology 6, 464—471. 

This chapter aims at reviewing the production of such aliphatic polyester layered silicate nanocomposites and the related improvements in terms of physical, mechanical, and thermal properties. Special attention will be focused on a selected polyester, i.e., poly(e-caprolactone) (PCL), considered as a model of the family of aliphatic polyesters. These results will be then briefly extrapolated to another well-known polyester, poly(lactide) (PLA). Materials performances will be discussed and analyzed in terms of the investigated production process and related nanostructural morphology. 

Aliphatic polyester layered silicate nanocomposites based on poly(e-caprolactone) (PCL) and on plasticized poly(L-lactide) (PLA) have been prepared first by melt blending of the respective polymer matrix with different (organo-modified) montmorillonites. It has been demonstrated that melt blending with organo-modified clay such as Cloisite 20A, 25A or SOB, yields intercalated nanocomposites with the possibility of partial exfoliation. Even at low organoclay content, substantial improvement of thermal stability, gas barrier properties and physical-mechanical performances have been noticed. However, melt blending of natural montmorillonite with PCL or neat (non plasticized) PLA leads to microphase-separated compositions. 

I. Pantoustier, N., Lepoittevin, B., Alexandre, M., Kubies, D., Calberg, C., Jerome, R., Dubois, Ph., 2002, Biodegradable polyester layered silicate nanocomposites based on poly(e-caprolactone). Polym. Eng. Sci. 42(9) 1928-1937. 

New trends involve the use of nanoparticles in synthetic fibers. Polymer-layered silicates, nanotubes, and POSS have been successfully introduced in a number of textile fibers, mainly poly-amide-6, polypropylene, and polyester. Although they reduce the flammability of these fibers, but on their own are not effective enough to confer flame retardancy to a specified level. However, in presence of small amounts of selected conventional FRs (5-10 wt %), synergistic effect can be achieved. With this approach fibers having multifunctional properties can also be obtained, e.g., water repellency or antistatic properties along with fire retardancy. Most of the work in this area at present is on the lab scale and there is a potential to take this forward to a commercial scale. 

As most work reported to date on thermosetting layered silicate nanocomposites involves epoxy resins, this review will focus on this class of thermosetting materials. However, some work pubUshed on other thermosets such as vinyl ester resins and imsaturated polyesters will be included where appropriate. 

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