Comb polymers prepared by ATRP from hydroxypropyl cellulose

Hydroxypropyl cellulose (HPC) was used as a core molecule for controlled grafting of monomers by ATRP, the aim being to produce densely grafted comb polymers. HPC was either allowed to react with an ATRP initiator or the first generation initiator-functionalized 2,2-bis(methylol)propionic acid dendr...

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Bibliographic Details
Published in:Biomacromolecules Vol. 8; no. 4; pp. 1138 - 1148
Main Authors: Ostmark, Emma, Harrisson, Simon, Wooley, Karen L., Malmstrom, Eva E.
Format: Journal Article
Language:English
Published: WASHINGTON Amer Chemical Soc 01.04.2007
Subjects:
Biochemistry & Molecular Biology
Carbohydrate Conformation
Carbohydrate Sequence
Cellulose - analogs & derivatives
Cellulose - chemistry
Chemistry
Chemistry, Organic
Life Sciences & Biomedicine
Molecular Sequence Data
Particle Size
Physical Sciences
Polymer Science
Polymers - chemical synthesis
Polymers - chemistry
Rheology
Science & Technology
Temperature
POLYESTERS
BLOCK-COPOLYMERS
TEMPERATURE
DIVERGENT SYNTHESIS
SURFACE
INTERFACES
SCANNING FORCE MICROSCOPY
TRANSFER RADICAL POLYMERIZATION
DENDRONIZED POLYMERS
REAL-TIME
ISSN:1525-7797, 1526-4602
Online Access:Get more information
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Summary:Hydroxypropyl cellulose (HPC) was used as a core molecule for controlled grafting of monomers by ATRP, the aim being to produce densely grafted comb polymers. HPC was either allowed to react with an ATRP initiator or the first generation initiator-functionalized 2,2-bis(methylol)propionic acid dendron to create macroinitiators having high degrees of functionality. The macroinitiators were then "grafted from" using ATRP of methyl methacrylate (MMA) or hexadecyl methacrylate. Block copolymers were obtained by chain extending PMMA-grafted HPCs via the ATRP of tert-butyl acrylate. Subsequent selective acidolysis of the tert-butyl ester moieties was performed to form a block of poly(acrylic acid) resulting in amphiphilic block copolymer grafts. The graft copolymers were characterized by H-1 NMR and FT-IR spectroscopies, DSC, TGA, rheological measurements, DLS, and tapping mode AFM on samples spin coated upon mica. It was found that the comb (co)polymers were in the nanometer size range and that the dendronization had an interesting effect on the rheological properties.
Bibliography:Medline
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ISSN:1525-7797
1526-4602
DOI:10.1021/bm061043w