Synthesis and Characterization of Comb-Type Grafted Polymer Hydrogels with Low Temperature Sensitivity
| Autor: | Sung Soo Kim, Taek Kyu Jung, Byung Cheol Shin |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution technology industry and agriculture food and beverages macromolecular substances Polymer chemistry.chemical_compound Monomer chemistry Polymerization Chemical engineering Chemistry (miscellaneous) Self-healing hydrogels Polymer chemistry Copolymer medicine Chemical Engineering (miscellaneous) Methanol Swelling medicine.symptom |
| Zdroj: | Journal of the Korean Chemical Society. 47:59-66 |
| ISSN: | 1017-2548 |
| DOI: | 10.5012/jkcs.2003.47.1.059 |
| Popis: | The comb-type grafted polymer hydrogels, which composed of N-isopropylacrylamide monomer and oligo(N-isopropylacrylamide-co-tert-butylacrylamide) [oligo(NIPAAm-co-t-BAM)], were synthesized by redox polymerization in 5~10% methanol aqueous solution using ammonium peroxodisulfate (APS) at 4 oC for 24h. The lower critical solution temperatures (LCSTs) of the comb-type grafted hydrogels were decreased with increase of t-BAM content in the grafted copolymer. We observed the effect of crosslinker and concentration of oligo(NIPAAm-co-t-BAM) on the shrinking/swelling ratio of hydrogels. Changes of shrinking/swelling ratio were decreased with increase of concentration of crosslinker. The increase of grafted oligo(NIPAAm-co-t-BAM) in the hydrogel shows an fast changes of shrinking/ swelling rate. The comb-type grafted hydrogels are expected to be valuable for the sensing materials of time-temperature labels(TTLs). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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