Abstract
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 language | English |
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Pages (from-to) | 70-78 |
Number of pages | 9 |
Journal | Macromolecular Research |
Volume | 25 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2017 Jan 1 |
Externally published | Yes |
Keywords
- 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