@article {48049,
	title = {Investigation of domain structures in monomethoxy poly(ethylene glycol)-b-poly(caprolactone) grafted poly(acrylic acid) by NMR diffusion studies},
	journal = {Polymer International},
	volume = {71},
	year = {2022},
	month = {AUG},
	pages = {976-984},
	type = {Article},
	abstract = {<p>
	Associating polymers developed by grafting a block copolymer of monomethoxy poly(ethylene glycol)-b-poly(caprolactone) (MPEG-b-PCL) onto poly(acrylic acid) undergo an irreversible sol-gel transition on heating. The influence of various physicochemical parameters on the thermoresponsive behaviour was examined by rheology and NMR studies. Pulsed field gradient NMR diffusion studies were performed to probe the mechanism of thermally induced gelation. Analysis of the diffusion data reveals the presence of loosely and strongly associated structures which respond differently to variation in temperature. It is observed that the polymer solution, which is visibly homogeneous, is heterogeneous on a mesoscopic scale with a distribution of domains. Detailed investigation of the thermally induced sol-gel transition shows that the mechanism of gelation involves irreversible alterations in the domain structure and size. (c) 2022 Society of Industrial Chemistry.</p>
},
	keywords = {associating polymers, hydrophobically modified polymers, NMR diffusion studies, Rheology, sol-gel transition, thermoresponsive polymers},
	issn = {0959-8103},
	doi = {10.1002/pi.6380},
	author = {Tiwari, Neha and Badiger, Manohar Virupax and Rajamohanan, Pattuparambil Ramanpillai and Ravindranathan, Sapna}
}
@article {50077,
	title = {Viscoelastic behaviors of hyaluronic derivatives as a function of pH, salt, and temperature},
	journal = {Journal of Polymer Science},
	volume = {64},
	year = {2026},
	month = {MAR },
	pages = {1505-1517},
	type = {Article},
	abstract = {<p>
	Hyaluronic acid and its derivatives are essential polysaccharides widely used in the bio-medical field for their applications in tissue engineering and controlled drug delivery. By revisiting the wide variety of rheological behavior of aqueous hyaluronan solutions as a function of pH, we develop in this work a comparative study between solutions of native hyaluronan (HA) and its derivative (HA-PEPO) obtained by grafting onto thermoresponsive side-chains of poly(ethylene oxide-co-propylene oxide) characterized by a phase transition around body temperature. Based on a large dataset obtained at a fixed polymer concentration, by changing either the chemical composition of the chain and/or the environmental conditions (pH, temperature, added salt), we show that the viscoelastic properties of hyaluronan solutions can be controlled over more than three decades of amplitude with the possibility to get either liquid or gel states, regardless of temperature, as well as sol/gel transitions induced by cooling or heating by the interplay between hydrogen bonds, hydrophobic interactions, and cation binding induced by potassium salts.</p>
},
	keywords = {hyaluronan, Hydrogel, pH-induced gelation, salt-induced gelation, thermoresponsive polymers, tissue engineering},
	issn = {2642-4150},
	doi = {10.1002/pola.70078},
	author = {Kadam, Yogesh and Badiger, Manohar V. and Rajamohanan, Pattuparambil R. and Wadgaonkar, Prakash P. and Ducouret, Guylaine and Merland, Theo and Hourdet, Dominique}
}
