THE CHARACTERIZATION AND PROPERTIES OF NYLON-13,13

The physical properties of the nylon with the longest number of methyl ene segments, nylon 13,13 have been characterized. Studies are reporte d of thermal analysis, X-ray scattering and for mechanical properties including hardness. The crystal of nylon 13,13 has been found to have a monoclinic form wit a = 4.9 angstrom, b = 9.22 angstrom, c = 34.40 a ngstrom and beta = 121.08-degrees. Also, studies were carried out on t he mechanical properties of nylon 13,13 that had been uniaxially drawn by solid-state extrusion at 125 and 135-degrees-C. The highest draw r atio obtained was 4.5. The maximum melting point, heat of fusion and a morphous density were estimated to be greater-than-or-equal-to 183-deg rees-C, 230 J g-1 and 1.01 g cm-3, respectively. The crystallinity, me lting temperature and tensile modulus increased with draw ratio. The g lass transition temperature of the undrawn polymer was 56-degrees-C. F or the sample with a draw ratio of 4.0, the tensile modulus and the X- ray crystal orientation function reached 2 GPa and 0.94, respectively.