01962nam a2200229Ia 4500 MX-MdCICY 20260521091033.0 CICY B-7164 Polycarbonate nanocomposites. Part 1. Effect of organoclay structure on morphology and properties Polymer, 44, p.5323-5339, 2003 Polycarbonate nanocomposites were prepared by melt processing from a series of organoclays based on sodium montmorillonite exchanged with various amine surfactants. To explore the effects of matrix molecular weight on dispersion, an organoclay was melt-mixed with a medium molecular weight polycarbonate (MMW-PC)and a high molecular weight polycarbonate (HMW-PC)using a twin screw extruder. The effects of surfactant chemical structure on the morphology and physical properties were explored for nanocomposites formed from HMW-PC. Wide angle X-ray scattering, transmission electron microscopy, and stress-strain behavior were employed to nvestigate the nanocomposite morphology and physical properties. The modulus enhancement is greater for nanocomposites formed from HMW-PC than MMW-PC. This trend is attributed to the higher shear stress generated during melt processing. A surfactant having both polyoxyethylene and octadecyl tails shows the most significant improvement in modulus with some of the clay platelets fully exfoliated. However, the nanocomposites formed from a range of other organoclays contained both intercalated tactoids and collapsed clay particles with few, if any, exfoliated platelets. POLYCARBONATE NANOCOMPOSITES MELT PROCESSING Yoon, P.J. Hunterb, D.L. Paul, D.R. https://drive.google.com/file/d/1Yd4JmfbBn-wyY-KS1hg-64HRgJCfmdw1/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 17434 17434 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-7164 2025-06-25 12:46:56 2025-06-25 REF1