Depolymerization of polycarbonate with catalyst in hot compressed water in fused silica capillary and autoclave reactors

Abstract

The phase behavior of polycarbonate (PC) with or without catalyst in water during heating, reaction, and cooling processes was studied in the FSCR under a microscope and recorded using a digital camera and a computer.

CeO2 nanocatalysts for the chemical recycling of polycarbonate

“…In this study, the CO 2 product is not monitored. Moreover, the further decomposition of BPA produces not only phenol but also phenol related compounds such as isopropylphenol and isopropenylphenol [18,[20][21][22][23][24][25][26]. While the further decomposition products excepting phenol are not identified, a further isopropylphenol decomposition product that can be purchased from Tokyo chemical was not detected by the HPLC analysis (Fig.…”

“…S1). When PC materials simply depolymerize to its contexture monomer, CO 2 is also produced with BPA monomer [19,20,[23][24][25][26]. In this study, the CO 2 product is not monitored.…”

“…The yields of monomer bisphenol A (BPA) and phenol were determined using the calibration curves created from the reference BPA and phenol samples purchase from Wako chemicals and using the following equation [20]:…”

“…Moreover, homogeneous catalytic reagents have been used to accelerate the reaction at low temperatures [14][15][16][17]. Regarding the chemical recycling of PC materials, the materials were depolymerized via hydrolysis in the presence of Na 2 CO 3 [18], NaOH [19], and manganese acetate [20] as catalytic reagents, via alcoholysis [21,22], and via glycolysis [23]. The chemical recycling of PC materials was also performed using high pressure and high temperature steam [24] or fluidized bed reactor via thermal pyrolysis [25] and via steam hydrolysis [26].…”

Graphene Oxide Reinforced Polycarbonate Nanocomposite Films with Antibacterial Properties

“…In the PC spectra, C-H stretching vibration appears in the range of 3000-2843 cm and ∼1390 cm −1 , respectively. Further, the intensity decreased due to low concentration of the GO in the polymer matrix [35,36].…”