| 摘要 |
Novel polyphosphazene copolymers are prepared which are comprised of repeating units represented by the formulas: …<CHEM>… wherein X is represented by the formula: …<CHEM>… where R1 and R2 are independently selected from the group consisting of substituted and unsubstituted alkyl radicals containing from 1 to 15 carbon atoms, substituted and unsubstituted cycloalkyl, aryl, aryl-alkyl and heteroxyclic radicals or R1 and R2 taken together form a cyclic ring; X min is selected from the group consisting of chlorine and substituted and unsubstituted alkoxa, 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 may be prepared by the reaction of a ketoxime and an additional reactant such as 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. |
