Methods for making multi-branched polymers
AssigneesInternational Business Machines Corporation, The Board of Trustees of the Leland Stanford Junior University
InventorsJames L. Hedrick, Eric Appel, Robert D. Miller, Fredrik Nederberg, Robert M. Waymouth
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Abstract
A method for making a multi-branched polymer includes reacting a first polymeric unit with a functional cyclic compound to form a functional macroinitiator compound with a cyclic moiety. The functional macroinitiator compound is reacted with an amine functional compound to open the cyclic moiety and form a first functional group and a second functional group. To form the branched polymer, at least one of a second polymeric unit is propagated from the first functional group and a third polymeric unit is propagated from the second functional group.
Claims22
A method for making a multi-branched polymer, comprising:
- reacting a first polymeric unit with a functional cyclic compound to form a functional macroinitiator compound with a cyclic moiety;
- reacting the functional macroinitiator compound with an amine functional compound to open the cyclic moiety and form a first functional group and a second functional group;
- and
- propagating at least one of a second polymeric unit from the first functional group and a third polymeric unit from the second functional group to form the branched polymer.
A method for making multi-branched polymers, comprising:
- reacting a hydroxyl functional first polymer with a carboxy functional cyclic carbonate compound to form a carbonate functional macroinitiator compound;
- reacting the carbonate functional macroinitiator compound with an amine functional compound to form a macrogenerator compound comprising a carbamate linkage and a hydroxyl group;
- and
- propagating at least one of a second polymer from the carbamate linkage and a third polymer from the hydroxyl functional group.
A mikto-arm polymer comprising a poly(ethylene glycol) arm, a central core comprising a carbamate linkage, and a second arm coupled to the core, wherein the second arm is selected from the group consisting of polyesters, polyolefins, polycarbonates, and polylactides.
Dependencies are inferred from the claim text.