We subsequently calculated: (i)The relative crystalline intensity ratios (I200/ I120) with I200 and I120 representing the sum of the intensity peaks at the (200) and (120) peaks respectively .(ii)The crystallinity index, Xc, calculated according to Grubb and Jelinski , and(iii)Herman’s orientation function, fc, using the equation : fc=(3{cos2θ}‑1)/2 where φ is the angle between the c axis and the fiber axis, {cos2φ} is the azimuthal width at the (200) and (120) diffraction peaks determined using the equation : {cos2φ}=1−A{cos2φ1}‑B{cos2φ2} where A = 0.8 and B = 1.2.