Abstract
A new chemical way has been introduced to recycle poly(ethylene terephthalate) via acido-alcoholysis. Acido-alcoholysis has been developed as a green way to produce oligoesters from PET waste which can be used as building blocks to new compostable polyesters. Organic acids and 1,4-butanediol were used as reagents. The solvolysis products were further reacted with diglycidyl ethers of different diols to obtain higher molecular weight polyesters. The resulted materials were tested with GPC, FTIR, TGA, functional group analysis methods and composting. It was found that the reagents in acido-alcoholysis fully incorporated into the reaction product obtaining oligoesters with carboxyl and hydroxyl end groups. Significant mass loss and fragmentation was observed on oligo- and polyesters after composting.
Highlights
Polyesters, especially poly(ethylene terephthalate) (PET)are widely used in industrial and research fields as advanced materials and in everyday life for packaging, fibers and various plastic products
Around 3600 cm-1 wide low intensity peak appeared on the spectrum of PET waste indicating the negligible presence of hydroxyl groups
4 Conclusions A new method, acido-alcoholysis was successfully developed for the chemical recycling of PET
Summary
Are widely used in industrial and research fields as advanced materials and in everyday life for packaging, fibers and various plastic products. Due to its wide range of application huge amounts accumulate in industrial and domestic waste. There are several methods to recycle PET waste namely, primary, secondary, tertiary and quaternery recycling. [1-3] The primary method consists in recycling primary preconsumer industrial polymer scrap back into the production process. The secondary method is the well known collection, separation and reprocessing of consumer polymer waste. The tertiary method is chemical recycling to obtain various chemicals and to produce new materials. The quaternary recycling method is incineration and pyrolisys
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