Functionalization of poly(1,3‐dioxolane)

Abstract

1,3-Dioxolane was polymerized in the presence of ethylene glycol in order t o prepare awdihydroxylated polymers which, upon reaction with pluriisocyanates yielded networks swellable in water. The crosslinks were made of urethane groups, which are bulky and hydrophobic. In order to expand the scope of the networks that can be envisioned, we have studied the replacement of the two end-standing hydroxylic groups by unsaturated polymerizable groups. Several methods are presented which allow successfully the quantitative endowment of the polymer endings with methacryloyl-or styryl-or vinylether-type groups.am-dihydroxylated poly( 1,3-dioxolane) was also metallated and used as a macroinitiator for the polymerization of ethylene oxide: the a,w-dihydroxylated triblock copolymer obtained is made of a central poly( 1,3-dioxolane) block flanked by two poly(ethy1ene oxide) ones.Several methods are also shown t o be efficient in the characterization of the hydroxylic end-standing functions of the polymer.

Cationic copolymerization of ε‐caprolactone and L,L‐lactide by an activated monomer mechanism

“…These characteristic features of cationic ringopening polymerization proceeding by the AM mechanism have stimulated interest in expanding the scope of its application to other classes of monomers. Thus, the cationic AM mechanism has been applied to the homopolymerization and copolymerization of epoxides, 7-12 oxetanes, 13 and cyclic acetals, 14,15 as well as polymerizations of cyclic esters (lactones), including cyclic carbonates. [16][17][18][19][20][21][22] Recently, the cationic homopolymerization of lactide proceeding by the AM mechanism has also been described.…”

Maghnite, a Green Catalyst for Cationic Polymerization of Vinylic and Cyclic Monomers

“…Indeed, Franta et al [6] synthesized methacryloyloxy-PDXL by adding methacrylic acid to hydroxylated PDXL, and Du et al [12] synthesized PDXL bismacromonomers by two methods: the acrylation of dihydroxylated PDXL with acrylic acid and the addition of 2-hydroxyethylmethacrylate as a transfer agent during the polymerization. In this work, we propose a new method to prepare PDXL bismacromonomers in one step with Mag-H as an initiator and by the addition of methacrylic anhydride as a transfer agent to the cationic polymerization system (Scheme 2).…”

“…[2] There is a diversity of applications, such as films for packaging materials, binders, molded materials, film casting, plastic bags, controlled drug release, and bioseparation. Indeed, PDXL with functional groups is more interesting because it is used in the preparation of hydrogels, [3][4][5][6] which are suitable materials for numerous biomedical applications. Among the different ways of preparing such hydrogels, the homopolymerization of hydrophilic, bifunctional macromonomers, such as bifunctional poly(ethylene oxide), [7,8] methacryloyloxy-PDXL, [6,9] and acryloyloxy-PDXL, [10][11][12] represents a good approach.…”

Solid‐State 1H NMR Studies of Degradable Poly(ethylene oxide) Based Hydrogels

“…The method has been extended to numerous other systems including amphiphilic networks9 or PEO hydrogels with charged groups at the network junction points 10. Since poly(1,3‐dioxolane) (PDXL) [(CH 2 CH 2 OCH 2 O) n ] is another hydrophilic nonionic polymer well soluble in water, the same approach was extensively used for the preparation of segmented degradable PDXL hydrogels 11–14…”