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Biodegradable polym...
Biodegradable polymers from renewable sources : Rheological characterization of hemicellulose-based hydrogels
- Article/chapterEnglish2005
Publisher, publication year, extent ...
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2005-01-28
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American Chemical Society (ACS),2005
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:kth-14606
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-14606URI
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https://doi.org/10.1021/bm049515zDOI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20100525
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Hemicellulose-based hydrogels were prepared by radical polymerization of 2-hydroxyethyl methacrylate or poly(ethylene glycol) dimethacrylate with oligomeric hydrosoluble hemicellulose modified with well-defined amounts of methacrylic functions. The polymerization reaction was carried out in water at 40 degrees C using a redox initiator system. The hydrogels were in general elastic, soft, and easily swellable in water. Their viscoelastic properties were determined by oscillatory shear measurements on 2 mm thick hydrogels under a slight compression to avoid slip, over the frequency range 10(-1) to 10(2). The rheological characterization indicated that the elastic response of the hydrogels was stronger than the viscous response, leading to the conclusion that the hydrogel systems displayed a predominantly solidlike behavior. The curves showed an increase in shear storage modulus with increasing cross-linking density. The nature of the synthetic comonomer in the hemicellulose-based hydrogels also influenced the shear storage modulus. Comparison of hemicellulose-based hydrogels with pure poly(2-hydroxyethyl methacrylate) hydrogels showed that their behaviors were rather similar, demonstrating that the synthetic procedure made it possible to prepare hemicellulose-based hydrogels with properties similar to those of pure poly(2-hydroxyethyl methacrylate) hydrogels.
Subject headings and genre
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dynamic-mechanical analysis
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wood
Added entries (persons, corporate bodies, meetings, titles ...)
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Albertsson, Ann-ChristineKTH,Fiber- och polymerteknologi(Swepub:kth)u1mpsp3u
(author)
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Ranucci, E.
(author)
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Laus, M.
(author)
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Giani, E.
(author)
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KTHFiber- och polymerteknologi
(creator_code:org_t)
Related titles
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In:Biomacromolecules: American Chemical Society (ACS)6:2, s. 684-6901525-77971526-4602
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