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Titolo:
SURFACTANT-INDUCED MESOMORPHIC BEHAVIOR OF FLEXIBLE POLYMERS
Autore:
IKKALA O; RUOKOLAINEN J; TORKKELI M; SERIMAA R; TENBRINKE G;
Indirizzi:
HELSINKI UNIV TECHNOL,DEPT TECH PHYS FIN-02150 ESPOO FINLAND UNIV HELSINKI,DEPT PHYS FIN-00014 HELSINKI FINLAND UNIV GRONINGEN,POLYMER CHEM LAB NL-9747 AG GRONINGEN NETHERLANDS UNIV GRONINGEN,CTR MAT SCI NL-9747 AG GRONINGEN NETHERLANDS
Titolo Testata:
Macromolecular symposia
, volume: 112, anno: 1996,
pagine: 191 - 198
SICI:
1022-1360(1996)112:<191:SMBOFP>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYANILINE; COMPLEXES; STATE; BULK; ACID;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
O. Ikkala et al., "SURFACTANT-INDUCED MESOMORPHIC BEHAVIOR OF FLEXIBLE POLYMERS", Macromolecular symposia, 112, 1996, pp. 191-198

Abstract

Conditions for micro phase separated structures based on flexible polymers associated with surfactants have been investigated. Reasonably strong attractive interactions are required to oppose macro phase separation between polymer and surfactant. In order to obtain micro phase separation, additionally a sufficiently strong polar-nonpolar repulsionhas to be present. Poly(4-vinyl pyridine), poly(2-vinyl pyridine) andpolyamide 6 have been used as model polymers in this work. Associations based on protonation, metal coordination and hydrogen bonding are presented and shown to yield micro phase separation under suitable conditions. In the charged systems, the polar-nonpolar repulsion easily becomes large enough to render micro phase separated structures. In hydrogen bonded (i.e. noncharged) systems a more delicate balance can be achieved in which case an order-disorder transition takes place from a homogeneous state, exhibiting nonetheless a distinct SAXS peak due to characteristic block copolymer-like fluctuations, to a micro phase separated ordered state.

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Documento generato il 24/11/20 alle ore 10:55:37