Journal
EXPRESS POLYMER LETTERS
Volume 1, Issue 4, Pages 189-196Publisher
BUDAPEST UNIV TECHNOL & ECON
DOI: 10.3144/expresspolymlett.2007.30
Keywords
polymer gels; material testing; graft polymerization; confocal laser scanning microscopy
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Funding
- Protista International AB (Bjuv, Sweden)
- The Swedish Foundation for Strategic Research
- The Swedish Foundation for International Cooperation in Research and Higher education [IG2003-2089]
- The Swedish Research Council [348-2004-4916, 621-2005-3604]
- The Swedish Institute [01211/2004]
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Graft polymerization of glycidyl methacrylate onto the pore surface of polyacrylamide macroporous gel was implemented in DMSO-aqueous solution using diperiodatocuprate(III) complexes as an initiator. The grafting densities up to 410% were achieved. The graft polymerization was confirmed by gravimetrical methods and FTIR. The graft polymerization of polymer inside the pores of the macroporous gel resulted in increased flow resistance through the gel matrix. The distribution of grafted polymer on the gel pore surface material was studied by scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM). CLSM is an alternative method for studying morphology of gel surface with grafted polymer having the advantages over the SEM allowing to investigate the distribution of grafted polymer inside the hydrogel in a native hydrated state. The microscopic techniques demonstrated uneven distribution of the grafted polymer inside the gel pores as a result of initiating the graft polymerization by insoluble initiator deposited on the pore surface.
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