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Sedimentation polymerization of an aqueous 2-hydroxyethyl acrylate solution with some crosslinkers was carried out using a simple sedimentation polymerization apparatus to give millimeter-size and very narrow size distributed poly(2-hydroxyethyl acrylate) (PHEA) gel beads. Also, heterogeneous acetylation of the resulting PHEA gel beads with acylating agents such as acetic anhydride, a mixture of acetic...
Heterogeneous esterification of poly(2-hydroxyethyl acrylate) (PHEA) gel with acylating agents such as acetic anhydride, a mixture of acetic anhydride and pyridine, and chloroacetic anhydride was carried out under various conditions. The selective esterification of PHEA gel proceeded smoothly in toluene from surface to give a novel core-shell type gel (gel capsule) consisting of a hydrophilic unreacted...
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