Hi, this is researcher who is trying to synthesize polyamide-imide via TMA-MDI.

I used universal synthesize procedure (temperature 80~130 / 140 Celius degree), but whenever I tried, it starts gelling during cooling procedure.

I think gelling starting temperature is around 50 C degree.

But one thing I missed is I didn't synthesized under N2 atmosphere (due to absence of equipment).

Does atmosphere (ambient vs N2) affect that much???

Or do I have to try another synthesized route???