Synthesis and Characterization of Comb-Type Grafted Polymer Hydrogels with Low Temperature Sensitivity

저온 감열 특성을 가지는 Comb-Type Grafted Polymer Hydrogels의 합성 및 특성평가

  • 정택규 (한국화학연구원 화학소재부) ;
  • 김승수 (한국화학연구원 화학소재부) ;
  • 신병철 (한국화학연구원 화학소재부)
  • Published : 2003.02.20


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).


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