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Temperature‐sensitive poly(vinyl methyl ether) hydrogel beads
Author(s) -
Theiss Daniel,
Schmidt Thomas,
Arndt KarlFriedrich
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200450652
Subject(s) - differential scanning calorimetry , swelling , materials science , polymer chemistry , ether , phase (matter) , glass transition , chemical engineering , polymer , chemistry , composite material , organic chemistry , physics , engineering , thermodynamics
Temperature‐sensitive hydrogel beads were prepared by radiation crosslinking of poly(vinyl methyl ether) PVME spheres wrapped in Ca‐alginate. The obtained gel beads have diameters in the sub‐millimeter or millimeter range (depending on the PVME concentration). They were characterized by sol‐gel analysis, swelling measurements, and differential scanning calorimetry. The gel content g increases with increasing radiation dose D . The swelling degree Q v decreases with increasing PVME concentration c p and increasing D . In comparison to PVME bulkgels the phase‐transition temperature of the synthesized PVME gel beads is a little decreased.