Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
MESOMORPHIC STATE OF POLY(VINYLPYRIDINE)-DODECYLBENZENESULFONIC ACID COMPLEXES IN BULK AND IN XYLENE SOLUTION
Autore:
IKKALA O; RUOKOLAINEN J; TENBRINKE G; TORKKELI M; SERIMAA R;
Indirizzi:
HELSINKI UNIV TECHNOL,DEPT TECH PHYS SF-02150 ESPOO FINLAND HELSINKI UNIV TECHNOL,DEPT TECH PHYS SF-02150 ESPOO FINLAND HELSINKI UNIV,DEPT PHYS SF-00140 HELSINKI FINLAND UNIV GRONINGEN,POLYMER CHEM LAB 9747 AG GRONINGEN NETHERLANDS UNIV GRONINGEN,CTR MAT SCI 9747 AG GRONINGEN NETHERLANDS
Titolo Testata:
Macromolecules
fascicolo: 21, volume: 28, anno: 1995,
pagine: 7088 - 7094
SICI:
0024-9297(1995)28:21<7088:MSOPAC>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONDUCTING POLYANILINE; POLYMERS; BLENDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
O. Ikkala et al., "MESOMORPHIC STATE OF POLY(VINYLPYRIDINE)-DODECYLBENZENESULFONIC ACID COMPLEXES IN BULK AND IN XYLENE SOLUTION", Macromolecules, 28(21), 1995, pp. 7088-7094

Abstract

Theoretically, lyotropic behavior of flexible polymers can be inducedby associating the polymers with a large amount of long-tail surfactants leading to bottle-brush type conformations in suitable solvents. To address this and related questions, complexes of poly(2-vinylpyridine) (P2VP) and poly(4-vinylpyridine) (P4VP) with p-dodecylbenzenesulfonic acid (DBSA), characterized by FT-IR, were investigated in the bulk and in xylene, i.e., a good solvent for the alkyl side chains. At a 1:1 molar ratio of vinylpyridine monomer and DBS, the polymers are shownby FT-IR to be almost completely protonated. In the bulk, the complexes form mesomorphic layer structures which have been characterized by polarized optical microscopy and by both wide- and small-angle X-ray scattering. In the xylene solutions, birefringence indicating liquid crystallinity is observed for concentrations of the fully protonated P4VP-(DBSA)(1.0) complex of ca. 50% (w/w) and higher. In contrast, for P2VP(DBSA)(1.0), this is only observed at complex concentrations of ca. 70% (w/w) and higher. The mesomorphic behavior of P4VP(DBSA)(1.0) in xylene was further demonstrated by SAXS.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 22:14:16