Stimuli‐responsive 4‐acryloylmorpholine/4‐acryloylpiperidine copolymers via nitroxide mediated polymerization. Issue 13 (13th April 2017)

• Record Type: Journal Article
• Authors: Savelyeva, Xeniya; Métafiot, Adrien; Li, Lucia; Bennett, Ian; Marić, Milan
• Is Part Of: Journal of polymer science. Volume 55:Issue 13(2017)
• Page Start: 2160
• Page End: 2170
• Publication Date: 2017-04-13
• Subjects: copolymerization -- nitroxide mediated polymerization -- poly(acrylamides) -- stimuli‐responsive polymers -- water‐soluble polymers; 547
• DOI: 10.1002/pola.28591
• Languages: English
• ISSNs: 0887-624X

Abstract

ABSTRACT: 4‐acryloylmorpholine/4‐acryloylpiperidine statistical copolymers were synthesized by nitroxide mediated polymerization (NMP) with BlocBuilder unimolecular initiator in dimethylformamide solution at 120 °C. The copolymers had narrow molecular weight distributions (dispersity Đ = 1.25–1.35, number average molecular weights M n = 8.5–13.7 kg mol −1 ). The copolymer microstructure was essentially statistical (reactivity ratios r 4AP = 0.81 ± 0.73, r 4AM = 0.73 ± 0.68 based on non‐linear fitting of the Mayo‐Lewis equation). Cloud point temperatures (CPT) in aqueous media were tuned from 11 °C to 92 °C, merely by adjusting the initial monomer composition. Using NMP permitted sharper control of the CPT transitions, compared to the similar copolymer made using conventional radical polymerization. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2017, 55, 2160–2170 Abstract : Copolymerization of two structurally similar monomers, 4‐acryloylmorpholine and 4‐acryloylpiperidine, via nitroxide mediated polymerization afforded copolymers with tunable cloud point temperatures (CPTs) and sharp transitions with narrow molecular weight distributions (1.25–1.35). These copolymers span a wider range of CPTs, starting from as low as 4 °C, broadening the scope for potential applications.