Lee, Hong-shik Jeong, Ju Hyeong Hong, Giyoung Cho, Hang-Kyu Baek, Bum Ki Koo, Chong Min Hong, Soon Man Kim, Jaehoon Lee, Youn-Woo 2024-01-20T12:30:28Z 2024-01-20T12:30:28Z 2021-09-05 2013-05-22 0888-5885 https://pubs.kist.re.kr/handle/201004/128050 The effect of various solvents on the de-cross-linking reaction of cross-linked polyethylene under subcritical and supercritical conditions was studied. The gel content of the de-cross-linked polyethylene decreased from 60 to 0.8-2.5% at 380 degrees C within 5 min in all of the solvents tested in this study. When water, ethanol, and 2-propanol were used, the M-w of the decross-linked polyethylenes decreased from 349,000 to 200,000-227,000 g/mol, and much lower M-w values of 70,000-90,000 g/mol were observed when acetone and diisopropyl ether were used. The de-cross-linked polyethylenes treated in the different solvents had a very similar chemical structure to raw polyethylene. According to a kinetic study using a first-order reaction model, the de-cross-linking rate in each solvent increased in the order 2-propanol < ethanol < n-hexane < water < methanol << diisopropyl ether << acetone at 350 degrees C. English AMER CHEMICAL SOC DECOMPOSITION DEPOLYMERIZATION TEREPHTHALATE METHANOL FLUIDS WATER RESIN Effect of Solvents on De-Cross-Linking of Cross-Linked Polyethylene under Subcritical and Supercritical Conditions Article 10.1021/ie4006194 1 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.52, no.20, pp.6633 - 6638 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 52 20 6633 6638 scie scopus 000319551400002 2-s2.0-84878248584 Engineering, Chemical Engineering Article DECOMPOSITION DEPOLYMERIZATION TEREPHTHALATE METHANOL FLUIDS WATER RESIN