Block Copolymers Based on Linear Poly(oxymethylene)(POM) and Hyperbranched Poly(glycerol): Combining Polyacetals with Polyethers
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United States of America Patent
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Issued Date -
Sep 3, 2015
app pub date -
Jun 19, 2014
filing date -
Jun 20, 2013
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Abstract
Synthesis of hyperbranched-linear-hyperbranched ABA triblock copolymers based on linear poly(oxy methylene) (POM) and hyperbranched poly(glycerol) (hbPG) blocks is described. The polymers having a polyacetal polyether structure were prepared from linear bishydroxy functional POM macroinititators, obtained by cationic ring-opening polymerization of trioxane and dioxane with formic acid as transfer agent and following hydrolysis of the formiate group. Partial deprotonation of the resulting hydroxyl groups permitted the hypergrafting by anionic ring-opening multibranching polymerization (ROMBP) of glycidol.
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