Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
CHARACTERIZING DOMAIN MIXING EFFECTS IN HYDROGEN BOND-COMPATIBILIZED POLYMER BLENDS
Autore:
TAYLORSMITH RE; REGISTER RA;
Indirizzi:
PRINCETON UNIV,DEPT CHEM ENGN PRINCETON NJ 08544 PRINCETON UNIV,DEPT CHEM ENGN PRINCETON NJ 08544
Titolo Testata:
Journal of polymer science. Part B, Polymer physics
fascicolo: 12, volume: 32, anno: 1994,
pagine: 2105 - 2114
SICI:
0887-6266(1994)32:12<2105:CDMEIH>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
DYNAMIC VISCOELASTIC BEHAVIOR; SULFONATED POLYSTYRENE; MISCIBILITY ENHANCEMENT; IONIC INTERACTIONS; MISCIBLE BLENDS; BLOCK POLYMERS; MORPHOLOGY; BOUNDARY; NMR;
Keywords:
POLYMER BLEND; PHASE MIXING; SMALL-ANGLE X-RAY SCATTERING; DYNAMIC MECHANICAL THERMAL ANALYSIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
R.E. Taylorsmith e R.A. Register, "CHARACTERIZING DOMAIN MIXING EFFECTS IN HYDROGEN BOND-COMPATIBILIZED POLYMER BLENDS", Journal of polymer science. Part B, Polymer physics, 32(12), 1994, pp. 2105-2114

Abstract

The nature and extent of phase mixing in blends of hydroxyl-functionalized polystyrene and poly (ethyl acrylate) (PS / PEA), where the driving force for mixing is hydrogen bonding, are characterized by severaltechniques. Small-angle x-ray scattering (SAXS) shows a reduction in average domain size with increasing functionalization level, a result also evident from scanning electron microscopy (SEM). Together, the two techniques reveal a very broad distribution of domain sizes. At highfunctionalization levels, both SAXS and SEM indicate a high degree of''in-domain'' mixing, with little or no pure PS or PEA remaining in the blends. Mathematical modeling of dynamic mechanical thermal analysis (DMTA) data is employed to quantify this progression. Initially, mixing is primarily interfacial, but as the functionalization level increases, the mixed interphase rapidly grows to occupy the entire material. In agreement with the SAXS and SEM results, DMTA modeling shows thatfurther increases in the functionalization level suppress the amplitude of composition variations in the sample. The onset of extensive in-domain mixing coincides with the marked changes in stress-strain behavior observed previously in these materials. (c) 1994 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 10:50:25