This chemical reaction had converted trimers and pentamers into polymers, then at the higher temperature ranges, the observed decomposition temperatures were just specific for newly formed polyamides, not for initial trimers or pentamers. The application of thermogravimetric chamber as mini reactor is quite useful to investigate the heating conditions for solid-state polymerization of , - aminoalkylterephthalamides. | Science & Technology Development, Vol 20, Thermal properties of , aminoalkylterephthalamides prepared from waste poly(ethyleneterephthalate) bottle and aliphatic diamines • • Hoang Ngoc Cuong Dang Hoang Yen University of Science,VNU-HCM (Received on 21st November 2016, accepted on 30th October 2017) ABSTRACT Trimers and pentamers of , aminoalkylterephthalamides were prepared from aminolysis of waste poly(ethyleneterephthalate) (PET) bottle with tetramethylene diamine (TMDA) and hexamethylene diamine (HMDA). The thermal properties of these products determined by DSC and TG showed that the melting points were the temperatures at which physical melting process and chemical transamidation polymerization occured concurrently. This chemical reaction had converted trimers and pentamers into polymers, then at the higher temperature ranges, the observed decomposition temperatures were just specific for newly formed polyamides, not for initial trimers or pentamers. The application of thermogravimetric chamber as mini reactor is quite useful to investigate the heating conditions for solid-state polymerization of , aminoalkylterephthalamides. Keywords: , -Aminoalkylterephthalamides, differential scanning calorimetry, polymerization, thermogravimetry analysis, thermal properties, transamidation solid-state INTRODUCTION Polyalkyleneterephthalamide is categorized as a semi-aromatic amide that formed from an aromatic dicarboxylic acid or diester and an aliphatic diamine. The presence of an aromatic moiety in the chain normally increases the thermal and mechanical properties of polymers. The synthesis and characterization of this polyamide and its copolymers have long been reported. Poly(hexamethyleneterephthalamide) (PA6T) is known for their low density, high abrasion resistance, easy dying, high alkali resistance, thermal stability and high modulus as fibers [1]. Copolymer of nylon 6 and PA6T is used in high-temperature applications, automobile parts .
