Depolymerization of poly(ethylene terephthalate) wastes using 1,4-butanediol and triethylene glycol

Chemical recycling of poly(ethylene terephthalate). Application to the synthesis of multiblock copolyesters

“…For example, saturated and unsaturated polyesters [10][11][12], polyurethanes [13][14][15], coating materials [16][17][18][19] and additives [20][21][22] have been synthesized from such building blocks in recent years. A large number of reagents have been used for glycolysis of PET such as ethylene glycol [23][24][25][26], diethylene glycol [27,28], propylene glycol [29], neopentyl glycol [14], 1,4-butanediol [30,31], and some synthetic oligoesters [32,33]. To the best of our knowledge, no one has ever been used BHET as diol for the PET glycolysis.…”

Performance evaluation of cutting fluids additives developed from recycling of polyethylene terephthalate

“…In order to remove the unreacted glycol, excess distilled water was added to the glycolyzed products and the solution was vigorously stirred and then filtered. The water would dissolve any unreacted glycols and the most of the glycolyzed products precipitated out [Mansour and Ikladious, 2002], Scheme 1.…”

Synthesis and characterization of BHETA based new polyurethanes

“…Glycolysis of PET has been widely investigated. Glycolysis is carried out using different glycols like; ethylene glycol, [11 -14] propylene glycol [15], 1,4-butanediol and triethylene glycol [10], diethylene glycol (DEG), dipropylene glycol (DPG), glycerol (Gly) [16] and etc.…”