Effect of Host–Guest Complexation on the Thermoresponsive Behavior of Poly(oligo ethylene glycol acrylate)s Functionalized with Dialkoxynapththalene Guest Side Chains. Issue 18 (22nd March 2021)

• Record Type: Journal Article
• Authors: Ryskulova, Kanykei; Hou, Zhanyao; Woisel, Patrice; Hoogenboom, Richard
• Other Names: Wurm Frederik R. guestEditor.; Boyer Cyrille guestEditor.; Sumerlin Brent S. guestEditor.
• Is Part Of: Macromolecular rapid communications. Volume 42:Issue 18(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-03-22
• Subjects: host–guest complexation -- LCST -- responsive polymers -- supramolecular chemistry; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.202100068
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract: The combination of thermoresponsive polymers with supramolecular host–guest interactions enables accurate tuning of the phase transition temperature, while also providing additional response mechanisms based on host–guest complexation. Most studies focused on a single thermoresponsive polymer to demonstrate the effect of host–guest complexation on the responsive behavior. In this work, the effect of the polymer structure on the host–guest complexation and thermoresponsive behavior is reported. Therefore, different poly(oligoethylene glycol acrylate)s, namely, poly(2‐hydroxyethylacrylate) (PHEA), poly(methoxy diethylene glycol acrylate), poly(methoxy triethylene glycol acrylate), and poly(methoxy tetraethylene glycol acrylate), are synthesized functionalized with 1, 5‐dialkoxynaphthalene guest molecules in the side chain. Their complexation with the cyclobis(paraquat‐ p ‐phenylene) tetrachloride host is studied to understand the effect of polymer structure on the supramolecular association and the polymer phase transition, revealing that the oligoethylene glycol side chains lead to weaker host–guest complexation and also have a smaller increase in the cloud point temperature compared to PHEA. Abstract : Thermoresponsive poly(oligoethyleneglycol acylate) (POEGA) copolymers with naphthalene side chains are reported. The supramolecular association with cyclobis(paraquat‐ p ‐phenylene) tetrachloride is discussed as well as the effect of naphthalene incorporation and subsequent host–guest complexation on the thermoresponsive behavior. The POEGA side chain length is found to be the determining factor that controls the supramolecular association and thermoresponsive behavior.