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Titolo:
Ordering in self-organizing comb copolymer-like systems obtained by hydrogen bonding between charged or noncharged polymers and amphiphiles
Autore:
Ikkala, O; Ruokolainen, J; Torkkeli, M; Tanner, J; Serimaa, R; ten Brinke, G;
Indirizzi:
Helsinki Univ Technol, Dept Engn Math & Phys, FIN-02015 Espoo, Finland Helsinki Univ Technol Espoo Finland FIN-02015 , FIN-02015 Espoo, Finland Univ Helsinki, Dept Phys, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ys, FIN-00014 Helsinki, Finland Univ Groningen, Dept Polymer Sci, NL-9747 AG Groningen, Netherlands Univ Groningen Groningen Netherlands NL-9747 AG G Groningen, Netherlands Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands Univ Groningen Groningen Netherlands NL-9747 AG G Groningen, Netherlands
Titolo Testata:
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
fascicolo: 1-2, volume: 147, anno: 1999,
pagine: 241 - 248
SICI:
0927-7757(19990130)147:1-2<241:OISCCS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYELECTROLYTE-SURFACTANT COMPLEXES; INDUCED MESOMORPHIC STRUCTURES; END-FUNCTIONALIZED OLIGOMERS; BLOCK-COPOLYMERS; CONDUCTING POLYANILINE; FLEXIBLE POLYMERS; BEHAVIOR; STATE; BULK; POLY(4-VINYLPYRIDINE)-PENTADECYLPHENOL;
Keywords:
polymer; amphiphile; hydrogen bonding; specific interaction; microphase separation; order-disorder transition; block copolymer;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Ikkala, O Helsinkinland Technol, Dept Engn Math & Phys, POB 2200, FIN-02015 Espoo, Fi Helsinki Univ Technol POB 2200 Espoo Finland FIN-02015 spoo, Fi
Citazione:
O. Ikkala et al., "Ordering in self-organizing comb copolymer-like systems obtained by hydrogen bonding between charged or noncharged polymers and amphiphiles", COLL SURF A, 147(1-2), 1999, pp. 241-248

Abstract

Mesomorphic structures and order-disorder transitions in comb copolymer-like systems obtained by hydrogen bonding of noncharged or charged homopolymers with amphiphiles are discussed. The amphiphiles consist of attractive and repulsive moieties and the emphasis will be on the situation without an additional solvent phase. Poly(4-vinyl pyridine), i.e. P4VP, hydrogen bondedto stoichiometric amounts of pentadecylphenol (PDP) is one of the characteristic examples. Small angle X-ray scattering and dynamic rheology demonstrate that this system forms a disordered melt at temperatures above the order-disorder temperature (T-ODT), whereas for T < T-ODT a lamellar microphaseseparated structure is observed. Further cooling renders side chain crystallization. This phase behavior can be tailored by adjusting the attraction and the repulsion between the amphiphile and the polymer. Repulsion can be increased by making the alkyl chain longer or by adding charges to the backbone. Roth lead in general to a higher T-ODT. Order-disorder transitions can occur even in polyelectrolyte-amphiphile complexes as is demonstrated by first fully complexing P4VP with toluene sulphonic acid (TSA) to form a polymeric salt P4VP(TSA)(1.0) which is further hydrogen bonded to PDP. The presented results offer guidelines to apply the concepts to other polymers as well, with an example mentioned in relation to polyamide 6. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 14:51:38