Synthesis and polymerization of the 16-(methacryloyloxy)-hexadecanoic acid and phospholipid in monolayers

Autor:	Olga Novikova, Sergei Yu. Zaitsev, T.I. Sergeeva, Elena A. Baryshnikova, Vitaly P. Zubov
Rok vydání:	1998
Předmět:	chemistry.chemical_classification Polymers and Plastics Organic Chemistry Phospholipid Polymer Condensed Matter Physics Polyelectrolyte chemistry.chemical_compound Monomer Photopolymer chemistry Polymerization Polymer chemistry Monolayer Materials Chemistry Side chain
Zdroj:	Macromolecular Symposia. 136:109-118
ISSN:	1022-1360
DOI:	10.1002/masy.19981360116
Popis:	Two surface-active monomers with methacrylic group at the end of hydrophobic tail: 16-(methacryloyloxy)hexadecanoic c acid (16-MAHDA) and bis[16-(methacryloyloxy)hexadecanoil] phosphatidylcholine (16-MAHDPC) have been synthesized and investigated. The monomers form stable monolayers at the liquid/gas interfaces with liquid-expanded and liquid-condensed states at low and high surface pressures, respectively. These monomers have been polymerized in the monolayers by low intensity UV-irradiation (254 nm). Dependences of polymerization rate vs. surface pressure for both monomers have maxima (3.4.10 -4 s -1 for 16-MAHDA and 5.5.10 -4 s -1 for 16-MAHDPC) at about 12 mN/m. The higher rate of 16-MAHDPC polymerization as compared to 16-MAHDA is due to the two polymerizable group in the molecule of lipid as compared to the only one in the molecule of acid. The collapse pressures increase after monomer polymerization that evidences an increase of the monolayer stability in the case of polymer as compared to monomer.
Databáze:	OpenAIRE
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