A process for preparing {HEAD ~ a Polyamide polymer} based on a dicarboxylic acid and a diamine by {TAIL ~ polycondensation} in an extruder, which comprises 
A process for preparing { HEAD ~ a Polyamide polymer } based on a dicarboxylic acid and a diamine by { TAIL ~ polycondensation } in an extruder , which comprises
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH