Abstract: Abstract : The crystal transitions and crystal orientations of Nylon 1010 drawing-induced at different drawing temperatures (Td) and drawing ratios (λ) were carefully studied by Differential Scanning Calorimetry (DSC), Wide-Angle X-ray Diffraction (WAXD) and Two Dimensional (2D) Wide-Angle X-ray Scattering (WAXS) experiments. Results show that drawing is favorable to the transition of δˊform from αform of Nylon 1010 and so-called Brill transition became more obviously with drawing ratio increasing under the same temperature. New relationship of crystal form versus temperature was first discovered in which δˊform of Nylon 1010 could be gradually transformed into αform when drawn at higher drawing temperature. This is distict from the crystallization performance of Nylon 1010 under thermal effect without drawing. The measurements of orientation degrees, based on 2D WAXS experiments, showed that crystal orientations were solely decided by the drawing ratios. Furthermore, the d spacing of (002) reflections increased with the drawing ratios, which also showed the dependence of long axis increasment on the drawing orientation.

Key words: Nylon 1010, drawing-induced crystallization, Brill transition, crystal orientation