Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 42, Issue 12, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202100096
Keywords
block copolymers; magnetically recyclable catalyst; reversible deactivation radical polymerization; self‐ healing; stimuli responsive polymers
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Funding
- MHRD, Govt. of India
- SERB, Govt. of India
- CSIR, Govt. of India
- SERB, India: Ramanujan Fellowship Award [SB/S2/RJN-113/2016]
- IIT Bhilai
- SERB, India: Early Career Research Award [ECR/2018/001990]
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A novel triple stimuli sensitive block copolymer has been synthesized, which responds to changes in temperature, pH, and light, and has the potential to be used in self-healing materials. The polymerization mechanism has been rationalized through density functional theory calculations.
A novel triple stimuli sensitive block copolymer is prepared by magnetically separable and reusable (up to multiple cycles) Ni-Co alloy nanoparticles mediated reversible deactivation radical polymerization (RDRP) at 25 degrees C, that responds to changes in temperature, pH, and light. Design of this block copolymer constitutes a temperature-sensitive N-isopropylacrylamide (NIPAM), an acid-sensitive lysine methacrylamide (LysMAM), and a light responsive umbelliferone (UMB) end group. The stimuli response, in response to one stimulus as well as combinations of stimuli, has been evaluated. Responsiveness to light allows the construction of self-healing materials. Density functional theory calculations rationalize the underlying mechanism of the polymerization.
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