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