| 摘要 |
Polyphosphazene copolymers are prepared which are comprised of repeating units represented by the formulas: <IMAGE> wherein X is represented by the formula: <IMAGE> wherein R1, R2 and R3 are independently selected from the group consisting of hydrogen, substituted and unsubstituted alkyl radicals containing from 1 to 15 carbon atoms, substituted and unsubstituted cycloalkyl, aryl, arylalkyl, and heterocyclic radicals; X' is selected from the group consisting of substituted and unsubstituted alkoxy, aryloxy, mercapto and amino radicals, and mixtures thereof; and 20</=(w+y+z)</=50,000 per polymer unit. The polyphosphazene polymers of the present invention are prepared by the reaction of the enol form of an aldehyde or a ketone and an additional reactant such as an alkanol, aryl alcohol, mercaptan, or amine with poly(dichlorophosphazene) in the presence of a tertiary amine. The polymers of this invention may be modified by crosslinking or curing. The polymers of this invention can be utilized to form protective films and may also be utilized in applications such as molding, coatings, foams and the like. |
