| 摘要 |
A composition comprises a blend of (a) a first crystalline fluoroplastic, which is an ethylene-tetrafluoroethylene copolymer, in an amount between 20 and 70 weight %; (b) a second crystalline fluroplastic, which is a terpolymer of tetrafluoro- ethylene, hexafluoro-propylene and vinylidene fluoride, in an amount between 25 and 70 weight %; and (c) a fluorinated thermoplastic elastomer, which is a block copolymer having at least one elastomeric segment comprising vinylidene fluoride, hexafluoro- propylene and tetrafluoroethylene repeat units in a mole ratio 45-90 : 5-50 : 0-35, and at least one nonelastomeric segment comprising tetrafluoroethylene and ethylene repeat units, in an amount between 5 and 25 weight %. The fluorinated thermoplastic elastomer ac ts as a compatibilizer for the two fluoroplastics. The composition exhibits improved flexibility, tensile strength, and/or elongation.
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