Synthesis of dual stimuli-responsive polymers through atom transfer radical mechanism in aqueous media

Abu B. Siddique, Jin Wook An, Hyun Jun Kim, Hyeongjong Park, Young Jin Lee, Geon Chang Lee, Ho Jung Kang, Jae Yeol Lee, Sehoon Kim, Jungahn Kim

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


New dual stimuli-responsive (thermo- & pH-) polymers were successfully synthesized through an atom transfer radical mechanism in aqueous media. N-Isopropylacrylamide (NiPAM) ([N]) as a precursor of temperatureresponsive moiety and sulfonamide-modified styrenic monomer and methacrylamide ([S]) were employed for the synthesis of the smart copolymers. The molar ratio of NiPAM to sulfonamide composed of the polymer backbone played an important role in the control of the phase transitional behavior of the formed block polymers. When the composition ratio of [S]/[N] decreases from 1/1 to 1/2, the dual stimuli-responsive phase behavior was clearly observed. Another important factor for the control of the phase morphology was to obtain the reactivity ratios, r1 and r2, of the two monomers. In this study, Cu(I)-catalyzed copolymerization of sulfadimethoxinyl methacrylamide (MASX; M1) and NiPAM (M2) as the precursors of smart materials yielded r1 = 8.046 and r2=1.572, leading to the production of a gradient type of copolymer in aqueous media. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)70-78
Number of pages9
JournalMacromolecular Research
Issue number1
Publication statusPublished - 2017 Jan 1
Externally publishedYes


  • atom transfer radical polymerization
  • block copolymer
  • dual stimuli-responsive
  • gradient polymer
  • reactivity ratio

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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