{HEAD ~ Polymer compositions} having attractive mechanical properties comprise {TAIL ~ linear alternating polymers} of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and minor amounts, relative to the polymer, of glass fiber reinforcement and mica 
comprise
{ HEAD ~ Polymer compositions } having attractive mechanical properties comprise { TAIL ~ linear alternating polymers } of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and minor amounts , relative to the polymer , of glass fiber reinforcement and mica
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH