Stability and thermosensitive properties of various poly(N-vinylcaprolactam) microgels

Thermally responsive microgels have been synthesised by polymerising N-vinylcaprolactam under various conditions. Stabilisation of the latices was of special interest and, thus, electrostatically, sterically, and electrosterically stabilised particles were prepared. Electrostatic stabilisation was a...

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Bibliographic Details
Published in:Colloid and polymer science 2002, Vol.280 (1), p.65-70
Main Authors: LAUKKANEN, A, WIEDMER, S. K, VARJO, S, RIEKKOLA, M.-L, TENHU, H
Format: Article
Language:English
Subjects:
Applied sciences
Detergents
Electrokinetics
Electrolytes
Exact sciences and technology
Initiators
Microgels
Organic polymers
Physicochemistry of polymers
Polymerization
Properties and characterization
Solution and gel properties
Stability
Thermosensitive
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Summary:Thermally responsive microgels have been synthesised by polymerising N-vinylcaprolactam under various conditions. Stabilisation of the latices was of special interest and, thus, electrostatically, sterically, and electrosterically stabilised particles were prepared. Electrostatic stabilisation was achieved by the use of an ionic initiator and/or an ionic detergent. Steric stabilisation was realised through a macromonomer technique, where polymerisable poly(ethylene oxide)-containing macromonomers were utilised as a detergent. Capillary electrophoresis was used to compare the electrokinetic properties of the polymer particles. All the product particles show thermal behaviour typical of poly(vinylcaprolactam), but sterically stabilised ones are superior in the stability against added electrolytes.[PUBLICATION ABSTRACT]
ISSN:0303-402X
1435-1536
DOI:10.1007/s003960200009