Study of the influence of gamma-rays on the structure and topography of the polyketone surface

Abstract

In this work, we investigated the effect of gamma-radiation of various doses on surface morphology, molecular vibrations, and polyketone structures. After irradiation of polyketone with gamma-quanta with a dose of 3.5×108 R, the surface roughness is smoothed, as a result, the average surface roughness decreases from Rz=879 nm to Rz=375.4 nm, and in the infrared spectra of the polyketone a peak with a wavenumber of 1174 cm−1 is observed. At exposure of gamma-radiation with a dose of 3.5×108 R, an increase in the length of the C1–C2, C2–H1 and C2–H2 bonds is observed, which leads to an increase in the unit cell parameters of the polyketone of the orthorhombic phase (space group Pnam). An increase in the dose of gammairradiation to 2×108 R leads to a decrease in the content of the amorphous phase and an increase in crystallinity. Irradiation with gamma-radiation stimulates the growth of crystallinity and the degree of crystallinity increases from 45.5% to 61.7%. A further increase in the dose (≥2×108 R) leads to a decrease in the degree of crystallinity, which is associated with the degradation of the polyketone.