Patent ID: 7745538

Claim:
Polymer composite including a compatibilizer and having selective permeability to chemical permeants due to interaction differences between the compatibilizer and the chemical permeants, the polymer composite comprising: 50-99 wt % of an amorphous (or low crystalline) thermoplastic resin as a matrix resin selected from the group consisting of polyethylenepropylendienterpolymer, poly(1-(trimethylsilyl)-1-propyne), -amorphous nylon, polystyrene and polycarbonate; 0.9-50 wt % of a semi-crystalline polymer selected from the group consisting of polyamide (nylons), polyethylene terephthalate, polybuthylene terephthalate, polyethylene, polypropylene, polyetheretherketone, polyvinylidene fluoride, polytetrafluoroethylene, polyphenylene sulfide, thermotropic liquid crystal polymer, and lyotropic liquid crystal polymer, and dispersed in the amorphous thermoplastic resin to provide a dispersed phase having an interface with the amorphous thermoplastic resin; and 0.1-10 wt % of a compatibilizer consisting of a block copolymer or a graft copolymer having compatibility or compatibility generated by interfacial reaction, being selected from the group consisting of poly(styrene-co-maleic anhydride), random or block copolymer of styrene and maleic, polystyrene whose oxazoline group is substituted, amorphous polymer added with a maleic anhydride group, polycarbonate having a reaction group, and polystyrene having a reaction group, and positioned at the interface of the dispersed phase with the amorphous thermoplastic resin, and having different interactions with different chemical permeants so that the selective permeability of the polymer composite is affected.