Molecular structure and dynamics of poly(methacrylic acid) and poly(acrylic acid) complexes with dodecyl-substituted poly(ethylene glycol)

Autor:	V. Doseva, L. L. Yasina, I. I. Aliev, Vladimir Y. Baranovsky, A. M. Wasserman
Rok vydání:	2003
Předmět:	Poly(methacrylic acid) Polymers and Plastics Micelle Polyelectrolyte chemistry.chemical_compound End-group Colloid and Surface Chemistry Pulmonary surfactant Methacrylic acid chemistry Polymer chemistry Materials Chemistry Physical and Theoretical Chemistry Ethylene glycol Acrylic acid
Zdroj:	Colloid and Polymer Science. 282:402-406
ISSN:	1435-1536 0303-402X
DOI:	10.1007/s00396-003-0941-y
Popis:	The molecular dynamics and the structure of molecular complexes formed by micelles of dodecyl-substituted poly(ethylene glycol) with poly(methacrylic acid) and poly(acrylic acid) in aqueous solutions were studied by viscosimetry, pH measurement, and electron spin resonance spin-probe techniques. At low surfactant concentrations, the conformation of the complex is a compact globule. The local mobility of surfactant molecules in such a complex is much slower than that in the “free” micelle. At high surfactant concentration, the nonionic micelles and polyacids form hydrophilic associates. The associates have the conformation of extended coils. In an associate, a major part of the micellar poly(ethylene glycol) groups is free. The local mobility of the micellar phase depends on the number of micelles involved in an associate. The mobility of surfactant molecules is slower in the complexes of poly(methacrylic acid) than in the complexes of poly(acrylic acid).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6ec15fc11ebe658d0c7ce7d6d0b7b241 https://doi.org/10.1007/s00396-003-0941-y Zobrazit plný text záznamu Full text from SpringerLink