Method of preparing polymers with low melt viscosity
AssigneeThe United States of America as represented by the Adminstrator of the National Aeronautics and Space Administration
InventorBrian J. Jensen
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Abstract
This invention is an improvement in standard polymerizations procedures, i.e., addition-type and step-growth type polymerizations, wherein momomers are reacted to form a growing polymer chain. The improvement includes employing an effective amount of a trifunctional monomer (such as a trifunctional amine, anhydride, or phenol) in the polymerization procedure to form a mixture of polymeric materials consisting of branced polymers, star-shaped polymers, and linear polymers. This mixture of polymeric materials has a lower melt temperature and a lower melt viscosity than corresponding linear polymeric materials of equivalent molecular weight.
Claims2
In the process for the preparation of poly(arylene ethers) by a polymerization procedure selected from the group consisting of addition-type polymerizations and step growth type polymerizations, in which the procedure monomers are reacted to form a growing polymer chain, the improvement therein which comprises:
- employing an effective amount of a trifunctional phenol monomer in the polymerization procedure to form an effective amount of a member selected from the group consisting of branched poly(arylene ethers) and star-shaped poly(arylene ethers) providing a mixture of poly(arylene ethers) having a lower melt temperature and a lower melt viscosity than corresponding linear poly(arylene ethers) of equivalent molecular weight.
Dependencies are inferred from the claim text.