2026. COMPARATIVE THERMAL DEGRADATION BEHAVIOUR OF PRISTINE AND MODI-FIED POLYVINYL CHLORIDE: INFLUENCE OF CUO AND FE3O4 NANOPARTICLES. Scientific journal of the Fergana State University. 31, 5 (Jan. 2026), 118. DOI:https://doi.org/10.56292/SJFSU/vol31_iss5/a118.