Hydrolysis of 4-acetoxystyrene polymers prepared by atom transfer radical polymerization

Reversible Addition-Fragmentation Chain-Transfer Polymerization for the Synthesis of Poly(4-acetoxystyrene) and Poly(4-acetoxystyrene)-block-polystyrene by Bulk, Solution and Emulsion Techniques

“…The nonlinearity of the curve at higher conversion has been noticed previously in controlled radical polymerizations and was ascribed to autoacceleration due to the increasing viscosity of the medium. [29] Furthermore, a series of polymerizations was carried out at temperatures of 60 8C, 80 8C and 90 8C (Figure 2). At low conversions, an approximately linear plot for time vs conversion was obtained at all temperatures and the rate of the reaction increased with increasing temperature.…”

Styrene/4-hydroxystyrene random, block and gradient copolymers modified with an organic dye: Synthesis by controlled radical polymerization and characterization of electrorheological properties

“…To remove the acetyl groups from the AS along the copolymer chain, each S/AS copolymer was added to a flask containing a 9:1 volume ratio of 1,4-dioxane to hydrazine hydrate and stirred in a N 2 atmosphere for 6 h at room temperature [33]. Meanwhile, Disperse Red 1 (DR1) was modified with a toluenesulfonyl group before being tethered to the hydrolyzed copolymers.…”

Linear and crosslinked copolymers of p-tert-butylcalix[4]arene derivatives and styrene: New synthetic approaches to polymer-bound calix[4]arenes

“…An obvious way to circumvent this potential problem was to derivatise the phenolic hydroxyls and, at a later stage, deprotect the functionalities. Acetyl, tertbutoxycarbonyl, trialkylsilyl and alkyl derivatives are usually employed in this context [20]. Preliminary experiments were pursued in order to get the said derivatives of compound 4.…”