| 摘要 |
The low temperature physical properties of copolymers and terpolymers containing fluoroalkoxy groups such as are described in U.S. Pat. Nos. 3,515,699 and 3,700,629 are improved by the incorporation of up to 35 mol % of non-fluorinated alkoxy groups in the polymers in place of some of the fluoroalkoxy groups. The polyphosphazenes of this invention also preferably contain a small amount of unsaturated substituent on the phosphazene backbone to enhance curability. |
