Method for controlled synthesis of polymers
AssigneeThe Regents of the University of California
InventorsKenneth J. Shea, James R. Walker, Hiude Zhu
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Abstract
Living polymer synthesis methods for the synthesis of oligomeric and high molecular weight polymers with low polydispersity are disclosed. The disclosed methods are based on the discovery that the reaction of a ylid with an organoborane at a high ylid:borane ratio and high temperature provides for the synthesis of high molecular weight polymers with low polydispersity.
Claims11
A method for making a linear polymer, said linear polymer comprising a backbone which comprises between about 25 and 10,000 carbon atoms, said method comprising the steps of:
- reacting an amount of ylid with an amount of organoborane at a temperature which is sufficient to cause polyhomologation of said ylid and organoborane to form a polyalkylborane which comprises a carbon backbone having a boron group attached thereto, wherein the ratio of the amount of ylid to the amount of organoborane is selected such that the backbone of said polyalkylborane produced during said polyhomologation comprises between about 25 and 10,000 carbon atoms;
- and
- replacing said boron group with a functional group to form said linear polymer which comprises a backbone having from between about 25 and 10,000 carbon atoms.
A method for making a linear polyalkylborane, said linear polyalkylborane comprising a backbone which comprises between about 25 and 10,000 carbon atoms, said method comprising the steps of:
- reacting an amount of ylid with an amount of organoborane at a temperature which is sufficient to cause polyhomologation of said ylid and organoborane to form said polyalkylborane which comprises a carbon backbone, wherein the ratio of the amount of ylid to the amount of organoborane is selected such that the backbone of said polyalkylborane produced during said polyhomologation comprises between about 25 and 10,000 carbon atoms.
Dependencies are inferred from the claim text.