02166nas a2200241   4500008004100000022001400041245011300055210006900168260009900237300001600336490000700352520124300359653002501602653002301627653001501650100001701665700002301682700002501705700002801730700001501758700001901773856013201792       2005                        eng d  a0032-386100aSynthesis and swelling behaviour of hydrophobically modified responsive polymers in dilute aqueous solutions0 aSynthesis and swelling behaviour of hydrophobically modified res  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcDEC  a12190-121990 v463 a<p>New series of associating polymers were synthesised in order to investigate opposite behaviours of hydrophobically modified water-soluble polymers and thermoresponsive water-soluble polymers carrying LCST stickers. On the basis of a poly(acrylic acid) backbone, amino-terminated poly(N-isopropylacrylamide), poly(ethylene oxide-co-propylene oxide) and/or dodecyl chains were grafted following a reaction of condensation activated by carbodiimide. Two homologous series of well-defined single grafted and double grafted copolymers were obtained, with double grafted chains containing both C12 and LCST grafts. The dilute solution properties of these copolymers were carefully studied by capillary viscometry. At low salt concentration and below the LCST of the grafts, the swelling properties of macromolecular chains are controlled either by intramolecular associations between hydrophobes, excluded volume effect exerted by hydrophilic grafts or by a balance between these opposite interactions. The deswelling of macromolecular chains, induced by hydrophobic interactions, is amplified at higher ionic strength and more particularly above the transition temperature of the side chains. (c) 2005 Elsevier Ltd. All rights reserved.</p>10aassociating polymers10apoly(acrylic acid)10aviscometry1 aIyer, N., P.1 aHourdet, Dominique1 aBadiger, Manohar, V.1 aChassenieux, Christophe1 aPerrin, P.1 aWadgaonkar, P.  uhttps://library.ncl.res.in/content/synthesis-and-swelling-behaviour-hydrophobically-modified-responsive-polymers-dilute-aqueous01933nas a2200253   4500008004100000022001400041245014900055210006900204260000800273300001200281490000700293520097800300653002501278653003801303653002601341653001301367653002301380653003001403100001701433700003001450700004301480700002601523856013001549       2022                        eng d  a0959-810300aInvestigation of domain structures in monomethoxy poly(ethylene glycol)-b-poly(caprolactone) grafted poly(acrylic acid) by NMR diffusion studies0 aInvestigation of domain structures in monomethoxy polyethylene g  cAUG  a976-9840 v713 a<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>
10aassociating polymers10ahydrophobically modified polymers10aNMR diffusion studies10aRheology10asol-gel transition10athermoresponsive polymers1 aTiwari, Neha1 aBadiger, Manohar, Virupax1 aRajamohanan, Pattuparambil, Ramanpilla1 aRavindranathan, Sapna  uhttps://library.ncl.res.in/content/investigation-domain-structures-monomethoxy-polyethylene-glycol-b-polycaprolactone-grafted