TY - JOUR ID - 1920 TI - Polyvinylpyrrolidone and polystyrene composites based on economical high quality biofillers derived from rice husk: Spectroscopic and hydrophilic investigations JO - Polyolefins Journal JA - POJ LA - en SN - 2322-2212 AU - NazarpourFard, Hamed AD - Department of Polymer Engineering, Faculty of Engineering, Lorestan University, Khorramabad, Iran Y1 - 2023 PY - 2023 VL - 10 IS - 1 SP - 45 EP - 57 KW - polyvinylpyrrolidone KW - Polystyrene KW - Rice husk derivatives KW - bio-composite KW - Spectroscopic and hydrophilic characteristics DO - 10.22063/poj.2022.3221.1232 N2 - Polyvinylpyrrolidone (PVP) composites based on rice husk (RH), rice husk carbon (RHC, i.e., black rice husk ash (BRHA)) and rice husk ash (RHA, i.e., white rice husk ash (WRHA)) were prepared separately through solution casting method. Similar composites were made using polystyrene (PS) through the same protocol. The carbon and ash obtained from this type of rice husk were obtained via pyrolysis at 300 and 600 °C, respectively, for 1 hour. The effects of these additives on the spectroscopic characteristics of polymers were verified by examining the infrared (FT-IR) and X-ray diffraction (XRD) spectra of the prepared composites. The resulting showed a remarkable difference between the spectra of parent polymers and the corresponding composites. Changes in peak width and 2θ parameters (observed in XRD patterns) revealed that PVP possesses better interactions with RHC, while PS has better interactions with RHA. Due to the high hydrophilicity of PVP, some investigations were accomplished on the hydrophilic properties of PVP samples. Polystyrene did not reveal detectable water vapor absorption (WVA), thus this experiment was not carried out for PS samples. Eventually, it was disclosed that there are significant discrepancies between the hydrophilic properties of PVP and its composites. In the other word, the WVA decreased from 290% for parent PVP to 210% for PVP-RHC composite. UR - http://poj.ippi.ac.ir/article_1920.html L1 - http://poj.ippi.ac.ir/article_1920_20ac1295b7d3a2ac42cc0d7ee64fadd1.pdf ER -