Polyesteramide resin from PET waste and fatty amide

Abstract

Purpose – The purpose of this paper is synthesis of polyesteramide resin from jatropha oil and monomer from recycling of poly(ethylene terephthalate) (PET) to get the excellent benefit of individual structure. Along with the synthesis of polyesteramide resin, this research work will also help in recycling of PET waste and help for the conversion of monomer obtained from recycling of PET to value-added application. Design/methodology/approach – Polyesteramide resin was synthesized by conventional method, i.e. by converting jatropha oil to corresponding fatty amide, i.e. hydroxyl ethyl jatropha oil fatty acid amide (HEJA), and treating it with dicarboxylic acid, i.e. sebacic acid but bis(2-hydroxyethyl) terepthalamide (BHETA) is added, i.e. monomer of PET, and then resin synthesis is carried out. Synthesized resin is cured with isocyanate and used for coating application. Coating is characterized for physical, mechanical, thermal and anticorrosive properties. Findings – Coating shows excellent balance of flexibility and hardness due to structural difference in BHETA and HEJA. Aromatic structure of BHETA was helpful for increasing hardness and for retardation of degradation, and at the same time, aliphatic structure of HEJA was helpful for increasing flexibility of the coating. Amide linkage present in both help for better adhesion of coating to metal surface, which also helps to improve the mechanical properties and anticorrosive properties. Practical implications – This method is the practical solution for synthesis of polyesteramide resin and then coating from PET waste and jatropha oil. Hence the method developed is simple and it helps for recycling of PET waste and conversion of recycled product to value-added material. Originality/value – To the best of the authors’ knowledge, this is the first study which use jatropha oil (fatty amide of jatropha oil) and PET waste (monomer of PET waste) simultaneously for the synthesis of polyesteramide resin and then coating.

Chemical upcycling of poly(ethylene terephthalate) waste: Moving to a circular model

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Enrichment of epoxy coating system with modified shell ash

“…one of the types is biomass waste (Kang and Schoenung, 2005;More et al, 2014b;Patil and Pokhrel, 2005;Garg et al, 2006) The recycling of waste materials reduces their accumulation, reduce water and oil contamination, its disposal issue gets reduced and provides the business to the huge sector of people as well as value added materials can be synthesised in a few cases from the same (Garg et al, 2006;Park and Kim, 2014). The product obtained from polymeric waste recycling already finds application in the coating (More et al, 2014a).…”

“…used for resin synthesis, the leaf extract such as neem leaves extract has been used for anticorrosive application. The products obtained from plant resources also used for antimicrobial application in the coating (More et al, 2014a;Ahmad et al, 2007;Sharma et al, 2015;Amitha Rani and Basu, 2012;Ponce et al, 2008). Along with the pure plant application the waste mass obtained from the plant also has enriched chemical components.…”

Synthesis of polyurethane dispersion from polyesteramide polyol

“…Various modifications have been done for polyesteramide resin to improve its performance properties. PEG-based modification improves its flexibility, while acrylic modification of polyesteramide improves its corrosion resistance (More et al, 2014, Aqeel et al, 2010.…”