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