Swelling characteristics of block order networks prepared by styrene-ethylene/butylene ABA triblock copolymer and styrene homopolymer binary blends

 
see the original item page
in the repository's web site and access all digital files if the item*
share




1995 (EN)
Swelling characteristics of block order networks prepared by styrene-ethylene/butylene ABA triblock copolymer and styrene homopolymer binary blends (EN)

Konstantakopoulos, IC (EN)
Valkanas, GN (EN)

N/A (EN)

Mixed networks based on polystyrene (PS) and styrene-ethylene/butylene triblock copolymer (SEES) binary blends were synthesized via a postpolymerization Friedel-Crafts-type reaction employing styrene units and a bis-chloromethylated crosslinking agent. The swelling behavior of the produced gels was studied in relation to network density, SEBS/PS mass ratio, and solubility parameter of the swelling media, in a range of aliphatic, chlorinated, and aromatic solvents. Swelling characteristics of the mixed macronets were found to differ markedly from those of pure homopolymer gels. Selective swelling was observed in three different regions in respect to the solvent solubility parameter, in contrast to pure PS networks where adsorption was favored in a single region of solvents. This phenomenon was found to depend primarily on the SEBS/PS constitution of gels, while the solvent holding capacity depended directly on the crosslinking density. (C) 1995 John Wiley & Sons, Inc. (EN)

journalArticle

Polymer blends (EN)
Gels (EN)
Swelling (EN)
Organic solvents (EN)
Solubility (EN)
Polymerization (EN)
Crosslinking (EN)
Block order networks (EN)
Network density (EN)
Block copolymers (EN)
Homopolymer gels (EN)
Microphase separation transition (EN)
Macronet (EN)
Density (specific gravity) (EN)
Polystyrenes (EN)
Styrene (EN)
Mass ratio (EN)
Styrene-ethylene/butylene triblock copolymer (EN)
Friedel-Crafts reaction (EN)
Postpolymerization (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Journal of Applied Polymer Science (EN)

1995


John Wiley & Sons Inc, New York, NY, United States (EN)



*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)