High modulus polymer composites and methods of making the same
First Claim
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1. A method comprising:
- mixing a filler simultaneously with a monomer that can react to form a grafted polymer layer on the surface of the filler and a pre-formed polymer;
wherein an interchange reaction takes place between a grafted layer on the surface of the filler and the pre-formed polymer to form a composite polymer.
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Abstract
The invention provides methods of producing composite polymers by combining fillers with polymers in the presence of preformed high molecular weight polymer. Monomer polymerization can be initiated through the addition of initiators or by reactive chemical groups on the surface of the fibers. The composite materials formed possess superior mechanical properties compared to similar polymer composites made by either purely mechanical mixing or solely polymerization of monomers in the presence of the fillers.
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Citations
22 Claims
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1. A method comprising:
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mixing a filler simultaneously with a monomer that can react to form a grafted polymer layer on the surface of the filler and a pre-formed polymer;
wherein an interchange reaction takes place between a grafted layer on the surface of the filler and the pre-formed polymer to form a composite polymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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mixing cellulose fibers with lactide and polylactic acid to form a premix contacting the premix with a composition comprising stannous octoate, triphenylphospine, and titanium isopropoxide, to produce a composite polymer contacting the composite polymer with poly(acrylic acid) to form a stabilized composite polymer.
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20. A composite polymer made by mixing a filler simultaneously with 1) a monomer that can react to form a grafted polymer layer on the surface of the filler and 2) a pre-formed polymer,
wherein an interchange reaction takes place between a grafted layer on the surface of the filler and the pre-formed polymer to form a composite polymer.
Specification