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245	1	0	_aPolycarbonate nanocomposites. Part 1. Effect of organoclay structure on morphology and properties
490	0		_vPolymer, 44, p.5323-5339, 2003
520	3		_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.
650	1	4	_aPOLYCARBONATE
650	1	4	_aNANOCOMPOSITES
650	1	4	_aMELT PROCESSING
700	1	2	_aYoon, P.J.
700	1	2	_aHunterb, D.L.
700	1	2	_aPaul, D.R.
856	4	0	_uhttps://drive.google.com/file/d/1Yd4JmfbBn-wyY-KS1hg-64HRgJCfmdw1/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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