In the present
paper, in situ ring opening anionic polymerization of laurolactam towards
polyamide 12 (PA12) was investigated, during reactive melt blending. The
reaction was taken place in an internal mixer, in the presence of sodium
caprolactam (catalyst), and toluene diisocyanate (activator).
The effect of
catalyst and activator contents on initiation time of the reaction and the
residual monomer was carried out in this study. Solvent extraction method was
used in order to remove the residual monomer. The experimentation is further undergone
to statistical analysis to extract the absolute optimal values of activator-
catalyst content in synthesized polyamide 12.
Two-factor design
in Response Surface Method (RMS) is suitably applied for validation analysis of
experimental data. The optimum content of catalyst and activator was obtained
2.53% and 1.15%, which offers the polyamide 12 with minimum residual monomer
equal to 1.26%.
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