THERMOTROPIC LIQUID-CRYSTAL POLYESTER NYLON 12 BLENDS.

The melting point of Nylon 12 at a heating rate of 20 degree C/min was about 176 degree C, while the LC polymer was about 280 degree C. The melting point of 10/90 LCP/nylon blend was 178 degree C, while the melting point of LCP was missing in the curve. When the LCP content was 20%, two melting curves occurred: one was around 176 degree C and the other was around 280 degree C, but the curve was not clear. Clear LCP melting points were observed at the higher LCP content samples. The data represent an average of 2-5 tests. Both tensile strength and modulus increase with an increase in the LCP content until reaching 70% LCP, then dropping sharply at 80% LCP and gradually increasing at 90% LCP. The elongation at break is reduced significantly when the LCP content changes from 10% to 30%, at which time it varies slightly with composition. It seems that rods made from 50/50 Nylon 12/LCP have a relatively higher ultimate elongation, while 80/20 rods have a lower break elongation. Neat Nylon 12 and 10/90 (LCP/Nylon 12) rods did not break when the elongation was over 100%.