## Abstract The dielectric permittivity ε′ and loss ε″ of anhydrous poly(2‐hydroxyethyl methacrylate) and its 38.6 w/w% hydrogel have been measured in the frequency range from 12 Hz to 200 kHz and the temperature range from 77 to 273 K. The former has a sub‐__T__~g~ relaxation with a half‐width of
Dielectric relaxations in poly(hydroxyethyl acrylate): influence of the absorbed water
✍ Scribed by J.L.Gómez Ribelles; J.M.Meseguer Dueñas; M.Monleón Pradas
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 335 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0032-3861
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📜 SIMILAR VOLUMES
The dependence of the rotation of the mesogenic unit around its long axis (prelaxation) on the actual mesophase in liqid crystalline polymethac ylates and polyacrylates was studied by dielectric spectroscopy in the frequency range from 10-2Hz to 106Hz and in a temperature range from 170 K to 430 K.
## Abstract A novel poly(acrylic acid)/montmorillonite superabsorbent composite with a water absorbency of 1100 times its own weight was synthesized by the graft copolymerization of acrylic acid with a cross‐linking agent in the presence of montmorillonite ultrafine powder. The influence of the amo