Journal ArticleDOI
Determination of the Polymer-Polymer Interaction Parameter for the Polystyrene-Polybutadiene Pair
Ryong-Joon Roe,Wang-Cheol Zin +1 more
TLDR
In this paper, the authors used the light scattering technique to measure the phase separation temperatures (cloud points) of mixtures containing a polystyrene and a polybutadiene of various molecular weights.Abstract:
: The light scattering technique was utilized to measure the phase separation temperatures (cloud points) of mixtures containing a polystyrene and a polybutadiene of various molecular weights and also of mixtures containing a polystyrene and a random or block copolymer of styrene and butadiene. The data was analyzed to obtain the polymer-polymer interaction parameter for the styrene-butadiene pair as a function of temperature and concentration. The value of the parameter deduced from the homopolymer mixtures agrees well with that obtained from the mixtures containing a copolymer. The polymer-polymer interaction parameter thus evaluated was compared with a theoretical expression derived on the basis of the Flory equation-of-state theory. The effect of the free volume disparity between the two components was found to play a relatively minor role in determining the interaction parameter when the two polymers lack any specific interactions which would make them mutually miscible. (Author)read more
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Theory of critical micelle concentration for solutions of block copolymers
TL;DR: In this paper, a simple microscopic model for micellar formation in mixtures of block copolymers and homopolymers is presented, and the size, number of chains, and energy of formation of micelle are calculated.
Journal ArticleDOI
Combinatorial approaches as effective tools in the study of phase diagrams and composition-structure-property relationships
TL;DR: A comprehensive overview of state-of-the-art combinatorial/high-throughput methodologies and tools for accelerated materials research and discovery can be found in this article.
Journal ArticleDOI
Miscibility of epoxy monomers with carboxyl-terminated butadiene-acrylonitrile random copolymers
D. Verchere,Henry Sautereau,Jean Pierre Pascault,S. M. Moschiar,Carmen C. Riccardi,Roberto J. J. Williams +5 more
TL;DR: In this paper, a simple Flory-Huggins lattice model, regarding both components as monodisperse, leads to the location of the critical point, coexistence curves and the estimation of the interaction parameter per unit volume (Λ).
Journal ArticleDOI
Coexistence curves of polystyrene/poly(dimethylsiloxane) blends
TL;DR: In this paper, the coexistence curves of blends of polystyrene (PS, Mw = 600 and 2.2 × 103 g mol−1) and poly(dimethylsiloxane) (PDMS,Mw = 460, 1400, 3700 and 2 3 × 105 g mol −1) were determined using a specially designed refractometer.
Journal ArticleDOI
Morphological studies of micelle formation in block copolymer/homopolymer blends
TL;DR: In this article, the micellar structure of poly(styrene-butadiene) diblock copolymer/polystyrene homopolymer blends has been investigated by small angle x-ray scattering (SAXS) and transmission electron microscopy (TEM) as a function of copolymers' concentration and homopolymers' molecular weights.