Effect of shear on phase-separation in polystyrene/poly(vinyl methyl ether)/ organoclay nanocomposites.
Blends of polystyrene (PS)/poly(vinyl methyl ether) (PVME) modified with two types of organoclay were prepared by solution casting from toluene. The effect of clay addition on the phase separating morphology of PS/PVME blend with critical composition (25/75) was examined both under quiescent conditions and under shear flow. The variation in critical temperature of phase separation was assessed by rheology, small angle laser light scattering (SALLS) and by on-line laser light transmission during shearing at fixed shear rate during heating. Transmission electron microscopy and X-ray diffraction analyses were used to examine the state of delamination and distribution of clay nanoparticles with the blend matrix.
Canada Research Chair on Polymer Physics and Nanomaterials, Department of Chemical Engineering (CREPEC), Laval University, G1K 7P4 Quebec City, Canada.
Khalil
K
El-Mabrouk
Sébastien
S
Vaudreuil
Abderrahim
A
Zeghloul
Mosto
M
Bousmina
D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D003460:Crystallization / Q000379:methods*; D004548:Elasticity; D006244:Hardness; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008738:Methyl Ethers / Q000737:chemistry*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D009930:Organic Chemicals / Q000737:chemistry*; D010316:Particle Size; D044367:Phase Transition; D011137:Polystyrenes / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties
D000538:Aluminum Silicates; D046911:Macromolecular Substances; D008738:Methyl Ethers; D009930:Organic Chemicals; D011137:Polystyrenes; D011145:Polyvinyls; C510739:poly(vinyl methyl ether); D000077215:Clay