Methods of making reversible crosslinked polymers and related methods

摘要

Methods are provided for making reversible crosslinked polymers. Exemplary methods comprise reacting first and second thermoplastic polymers having non-hindered olefins in the presence of a metathesis catalyst under conditions sufficient to form a crosslinked polymer. In certain embodiments, the methods comprise providing a crosslink promoting additive to improve the strength of the crosslinked polymer. In some embodiments, the methods comprise decrosslinking a crosslinked polymer through a metathesis or an ozonolysis reaction.

主权项

1. A method for making a reversible crosslinked polymer comprising:
providing a mixture of polymers consisting of first and second semicrystalline thermoplastic polymers, each having at least one pendant olefin, wherein the pendant olefin is non-hindered, and wherein (a) each of the first and second polymers has an olefin content of less than approximately 30% by weight, and (b) each of the first and second polymers includes a backbone selected from the group consisting of: polyethylene, polypropylene, acrylonitrile butadiene styrene, acrylic acid and derivatives, cycloolefin copolymer, ethylene vinyl acetate, ethylene vinyl alcohol, fluorinated ethylene propylene, fluoroplastics, perfluoroalkoxy copolymer, polyacetal, polyacrylates, polyacrylonitrile, polyamine, polyamide-imide, polyaryletherketone, polybutadiene, polybutylene, polybutylene terephthalate, polycaprolactone, polychlorotrifluoroethylene, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, polycarbonate, polyhydroxyalkanoates, polyketone, polyester, polyetheretherketone, polyetherketoneketone, polyetherimide, polyethersulfone, polyethylenechlorinates, polyethylene tetrafluoroethylene, polyimide, polylactic acid, polymethyl methacrylate, polymethylpentene, polyphenylene oxide, polyphenylene sulfide, polyphthalamide, polystyrene, polysulfone, polytrimethylene terephthalate, polyurethane, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, styrene-acrylonitrile, and combinations or copolymers thereof; providing a first metathesis catalyst; and reacting the first and second polymers in the presence of the metathesis catalyst under conditions sufficient to form a crosslinked polymer.