Block copolymers of polyphenylene oxides and non-sterically-hindered high molecular weight aromatic polycarbonates

Claim 1

A block copolymer of a polyphenylene oxide and a non-sterically hindered high molecular weight polycarbonate consisting of chemically combined (i) polyphenylene oxide blocks of the formula, ##STR7## wherein independently the --(OEO)-- is a divalent quinone residue, E is a divalent arene radical, either a or b is a number at least equal to 1, and the sum of a plus b is at least equal to 10, R is hydrogen, a hydrocarbon radical, a hydrocarbonoxy radical or a halohydrocarbonoxy radical, (ii) non-sterically-hindered high molecular weight aromatic polycarbonate blocks of the formula, ##STR8## wherein R f is selected from an alkylene, alkylidene, cycloalkylene, cycloalkylidene or arylene linkage or a mixture thereof, a linkage selected from the group consisting of ether, carbonyl, amine, a sulfur or phosphorous containing linkage, Ar and Ar' are arene radicals, Y is bromine, chlorine or a monovalent alkyl or alkoxy group, each d represents a whole number up to a maximum equivalent to the number of replaceable hydrogens substituted on the aromatic rings comprising Ar or Ar', subject to the proviso that when d is equal to two or more, no more than one Y group is ortho-positioned relative to an --OH group, X is bromine, chlorine or a monovalent hydrocarbon group selected from the class consisting of alkyl, aryl and cycloalkyl groups, e represents a whole number of from 0 to a maximum controlled by the number of replaceable hydrogens on R f , aa, bb and cc represent whole numbers including 0, when bb is not zero, neither aa nor cc may be zero, otherwise either aa or cc but not both may be 0, when bb is zero, the aromatic groups can be joined by a direct carbon bond, x is a number at least equal to 30, and (iii) carbonyl radicals of the formula ##STR9##