▎ 摘　　要

NOVELTY - Polymeric composition comprises a copolymer having two separate recurring units, a first recurring unit and a second recurring unit both having the formula, given in the specification, where the value of the subscript x ranges from 2-5000, subject to the limitation that the value of the subscript y ranges from 2-5000. The ratio of x:y ranges from 1:99 to 29:71. The polymeric composition is semicrystalline having an inherent solution viscosity greater than 0.3 deciliter/gram (dL/g), a Tg greater than 180degrees Celsius, a Tc less than 340degrees Celsius, a Tm less than 400degrees Celsius, and an enthalpy of melting endotherm (DeltaHm) greater than 10 joules/gram (J/g) and less than 55 J/g, where semicrystalline copolymer crystallizes from a melt at a cooling rate of from 5-200 degrees Celsius/minute. USE - Semicrystalline poly(aryl ether ketone) copolymer compositions are used in high pressure and high temperature environment such as oil and gas exploration and extraction. ADVANTAGE - The semicrystalline poly(aryl ether ketone) copolymer compositions hasS improved heat resistance and chemical resistance. DETAILED DESCRIPTION - Polymeric composition comprises a copolymer having two separate recurring units, a first recurring unit and a second recurring unit both having the formula, given in the specification, where the value of the subscript x ranges from 2-5000, subject to the limitation that the value of the subscript y ranges from 2-5000. The ratio of x:y ranges from 1:99 to 29:71. The polymeric composition is semicrystalline having an inherent solution viscosity greater than 0.3 deciliter/gram (dL/g), a Tg greater than 180degrees Celsius, a Tc less than 340degrees Celsius, a Tm less than 400degrees Celsius, and an enthalpy of melting endotherm (DeltaHm) greater than 10 joules/gram (J/g) and less than 55 J/g, where semicrystalline copolymer crystallizes from a melt at a cooling rate of from 5-200 degrees Celsius/minute. INDEPENDENT CLAIMS are also included for: (1) a material, where the weight percent of filler ranges from 10-80 wt.%; (2) an article of manufacture comprising the polymeric composition; and (3) a method of making a semicrystalline copolymer, which involves reacting at least one dihalo-derivative with compound of formula (V) and mixture of compound of formula (VI, VII) in a hydrophilic organic solvent in the presence of an alkali metal carbonate or a mixture of alkali metal carbonate from 140-290degrees Celsius, where a is selected from 1 and 2, in a molar ratio (VI:VII) of 29:71 to 1:99, where a in compound of formula V is selected as 1, or in a molar ratio (VI:VII) of 1:99 to 99:1. X=chlorine and fluorine atom; R1=alkali metal and a hydrogen atom; and R2=alkali metal and a hydrogen atom.