Main content area

Effects of Anti-Oxidants on Size Distribution of Polycaprolactam during Melting and Melt-Spinning

Bhattacharya, T. K., Abubakkar, MD., Mukherjee, A. K.
antioxidants, fabrics, heat treatment, mechanical properties, melting, nitrogen, polymerization, polymers, spinning, temperature, textile fibers, thermal degradation
The changes in the size distribution of polycaprolactam that take place during melting and melt-spinning have been studied. During melting under a nitrogen atmosphere, thermal degradation as well as post polymerization takes place. Spinning the polymer under atmospheric conditions, thermal, thermo-oxidative, and mechanical degradations come into play. Post polymerization is also operative in this case. The net change that is being encountered in these processes is a broader size distribution of the polymer as compared to that of the parent one. The effects of three different anti-oxidants, which are paraphenylene diamine derivatives, on the size distribution of polycaprolactam during melting and melt-spinning have been studied. Anti-oxidants are found to check the broadening of the size-distribution curve and retain the mechanical properties of the material to an appreciable extent, even after heat treatment at a temperature of 160°C for 8 hours under atmospheric condition.