Polyaryleneetherketone triphenylphosphine oxide compositions incorporating cycloaliphatic units are provided which may be used as a polymeric binders in thermal control coatings for use in space environments. A method is also provided for synthesizing the polyaryleneetherketone triphenylphosphine oxide compositions. A method is also provided for synthesizing the monomeric compositions used to make the polyaryleneetherketone triphenylphosphine oxide compositions.