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Viscoelastic relaxation phenomena in poly(mono-n-alkyl itaconates)

✍ Scribed by R. Díaz-Calleja; M. J. Sanchis; L. Gargallo; D. Radic

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 401 KB
Volume: 34
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(19960130)34:2<261::aid-polb6>3.0.co;2-w

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✦ Synopsis

Dynamic mechanical relaxation measurements were carried out on two poly(monoalkylitaconates). Three relaxation peaks between -120 and 140°C were present. A prominent subglass relaxation (p) near -60°C was studied by means of the Fuoss-Kirkwood formalism.

A slight viscoelastic activity (/3' ) was observed at room temperature, and then a high temperature peak ( a ) , probably related to the glass transition, was found. A biparabolic model, double Cole constant phase element was used to model the experimental data in this zone.

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Swelling Kinetics of Poly(acrylamide)/Po

Swelling Kinetics of Poly(acrylamide)/Poly(mono-n-alkyl itaconates) Hydrogels

✍ Katime, I.; Velada, J. L.; Novoa, R.; Díaz de Apodaca, E.; Puig, J.; Mendizabal, 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 356 KB 👁 2 views

Hydrogels of mono-n-alkyl itaconate/N-acrylamide have been synthesised. The swelling process at three different pH values (acid, neutral and basic) has been studied. The experimental data indicate that our hydrogels follow second-order swelling kinetics. According to this, the kinetic constant, K, ,