Evaluating the Role of antioxidants in the stabilization of hydroxypropyl cellulose by ATR-FTIR Spectroscopy

This study is aimed at evaluating the performance of tetrakis[methylene- 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane (S1010), tris(2,4-di-tert-butylphenyl) phosphite and ascorbic acid antioxidants in stabilizing hydroxypropyl cellulose. For this purpose, films with weight percent ratio of 0.4 % (w/w) were prepared in 1 % isopropanol solution (w/v). Then, the films were tested under three accelerated aging conditions, i.e. light (UV; 216hr), dry-heat (120°C; 240 hr) and moist-heat (70°C; RH: 95%; 240 hr). During the aging processes, structural changes were studied using attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy based on the defined destruction indices. In addition, color changes of the films were evaluated by colorimetry in CIELab system before and after aging processes. According to the results, S1010 phenolic antioxidant improved color and structural stabilization of HPC against environmental destructing factors in photooxidation, thermooxidation and hydrothermal degradation processes. Prog. Color Colorants Coat. 11 (2018), 93-101© Institute for Color Science and Technology.