Synthesis and polyelectrolyte behavior of poly(methacrylic acid) star polymers
Poly(tert‐butyl methacrylate) [P(tBMA)] star polymers were synthesized by copolymerization of p(tBMA) macroinitiator with ethylene glycol dimethacrylate via atom transfer radical polymerization method. P(tBMA) stars had a narrow molecular weight distribution (Mw/Mn = 1.06–1.15). The ratio of radius...
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Published in | Journal of applied polymer science Vol. 105; no. 3; pp. 1543 - 1550 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Hoboken
Wiley Subscription Services, Inc., A Wiley Company
05.08.2007
Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | Poly(tert‐butyl methacrylate) [P(tBMA)] star polymers were synthesized by copolymerization of p(tBMA) macroinitiator with ethylene glycol dimethacrylate via atom transfer radical polymerization method. P(tBMA) stars had a narrow molecular weight distribution (Mw/Mn = 1.06–1.15). The ratio of radius of gyration to hydrodynamic radius RG/RH, which indicates inner segment density, was in the range 1.16–1.22 in tetrahydrofuran (THF) (arm number f = 25–142). These stars behaved not as hard spheres but as soft spheres in THF. Poly(methacrylic acid) stars were obtained by the hydrolysis of P(tBMA) arms. We investigated the conformation of star polyelectrolyte as a function of pH and ionic strength by means of dynamic light scattering (DLS). The hydrodynamic diameter increased gradually from 18.8 to 48.3 nm as a function of the solution pH. In addition, we compared experimental results with theoretical models for star polyelectrolytes. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007 |
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Bibliography: | ArticleID:APP24966 istex:F878F28B4F57D28BB2DEF2A157F5FC245DF0CEA0 ark:/67375/WNG-LTLC3G25-R ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0021-8995 1097-4628 |
DOI: | 10.1002/app.24966 |