The aminolysis of poly(ethylene terephthalate) (PET) waste bottle with excess amount of aliphatic diamines, such as tetramethylenediamine (TMDA) and hexamethylenediamine (HMDA) without catalyst has been carried out. Each trimers and pentamers in the obtained products were isolated and characterized by FTIR, NMR, HPLC methods. Although an excess of diamine was employed, longer blocks of oligomers were still formed as minor products. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 20, SOÁ T2- 2017 Aminolysis of poly(ethylene terephthalate) waste bottle with tetra/hexamethylene diamine and characterization of alpha, ohmega-diamine products Hoang Ngoc Cuong Dang Hoang Yen University of Science, VNU-HCM (Received on 21 th November 2016, accepted on 18 th July 2017) ABSTRACT The aminolysis of poly(ethylene terephthalate) (PET) waste bottle with excess amount of aliphatic diamines, such as tetramethylenediamine (TMDA) and hexamethylenediamine (HMDA) without catalyst has been carried out. Each trimers and pentamers in the obtained products were isolated and characterized by FTIR, NMR, HPLC methods. Although an excess of diamine was employed, longer blocks of oligomers were still formed as minor products. Keywords: bis(4-aminobutyl) terephthalamide (BABT), bis(6-aminohexyl) terephthalamide (BAHT), hexamethylenediamine (HMDA), oligomers, poly(ethylene terephthalate) (PET), tetramethylenediamine (TMDA), poly(hexamethylene terephthalamide), poly(tetramethylene terephthalamide), waste bottle recycling INTRODUCTION products and energy, but also contributes to the manufacturing value-added products. Poly(ethylene terephthalate) (PET) finds applications across diverse industries such as food and beverage packaging, automotive, electronics among the others. Every year, hundreds billion PET bottles are produced worldwide. The increasing demand of PET has resulted in the increasing waste. Stringent environmental rules and regulations by government requires to recycle PET waste. A large quantity of PET waste is recycled by a physical process and just a smaller one by chemical method. Chemical recycling is defined as the process leading to complete or partial degradation of waste polymer to monomer or oligomer, respectively. Chemical recycling of PET does not only serve as a method to reduce the solid waste, to conserve raw petrochemical Based on the ester functionality, PET may react with water, alcohols, amines to
