| abstract |
New compositions comprise a blend of (A) a thermoplastic polymer selected from copolymers of ethylene and tetrafluoroethylene, and thermoplastic vinylidene fluoride polymers; and (B) a thermoplastic elastomer having (i) at least one elastomeric segment comprising (a) repeating units of vinylidene fluoride, hexa or pentafluoropropylene, and tetrafluoroethylene in a molecular ratio of 45-90: 5-50: 0-35 or (b) repeating units of perfluoro (alkyl vinyl ether), tetrafluoroethylene and vinylidene floride in a ratio of 15-75: 0-85: 0-85; and (ii) at least one non-elastomeric segment selected from segments comprising repeating units of ethylene and tetrafluoroethylene in a molecular ratio of 40-60: 60-40, and segments comprising repeating units of vinylidene fluoride , hexafluoropropylene and tetrafluoroethylene in a molecular ratio of 0-100: 0-50: 0-100, with the proviso that if the thermoplastic polymer is a vinylidene fluoride polymer, the mixture is crosslinked. |