TY  - BOOK
AU  - Yoon,P.J.
AU  - Hunterb,D.L.
AU  - Paul,D.R.
TI  - Polycarbonate nanocomposites. Part 1. Effect of organoclay structure on morphology and properties
KW  - POLYCARBONATE
KW  - NANOCOMPOSITES
KW  - MELT PROCESSING
N2  - 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
UR  - https://drive.google.com/file/d/1Yd4JmfbBn-wyY-KS1hg-64HRgJCfmdw1/view?usp=drivesdk
ER  -