01884nam a2200193Ia 4500003001000000005001700010040000900027245010200036490003500138520121500173650001801388650001901406650002001425700001501445700001801460700001501478856015601493008004101649MX-MdCICY20260521091033.0  cCICY10aPolycarbonate nanocomposites. Part 1. Effect of organoclay structure on morphology and properties0 vPolymer, 44, p.5323-5339, 20033 aPolycarbonate 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.14aPOLYCARBONATE14aNANOCOMPOSITES14aMELT PROCESSING12aYoon, P.J.12aHunterb, D.L.12aPaul, D.R.40uhttps://drive.google.com/file/d/1Yd4JmfbBn-wyY-KS1hg-64HRgJCfmdw1/view?usp=drivesdkzPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx250602s9999    xx |||||s2   |||| ||und|d