Advanced recycled polyester based on PET and oleic acid

Naguib, Hamdy M.; Zhang, Xiu H.

doi:10.1016/j.polymertesting.2018.05.049

Cited by 32 publications

(17 citation statements)

References 19 publications

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“…UPER containing terminal unsaturated groups can also be obtained by condensation of PET glycolysate with unsaturated monocarboxylic acids, e.g. oleic acid [127]. The properties of the polyester composition obtained in this manner, both before and after cross-linking, largely depend on the type of diol used for degradation of PET.…”

Section: Areas Of Application For Pet Glycolysis Productsmentioning

confidence: 99%

Chemical recycling of polyesters

et al. 2019

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In the presented paper, two basic strategies that can be used in the processes of chemical recycling of polyester material were described. The first of them involves increasing the molar mass of recycled materials in the solid-state polycondensation (SSP) process and/or joining their chains with various types of substances easily reacting with the end groups of polyesters (so-called extending agents). The essence of the second strategy is the degradation of the material under the influence of various protogenic agents (such as water, alcohols, glycols and amines) to obtain low-molecular products or oligomers that can be used as raw materials in the synthesis of many classes of polymers. The methods that are already used in PET [poly(ethylene terephthalate)] recycling and the possibility of their extension to other types of polyesters are both shown.

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Section: Areas Of Application For Pet Glycolysis Productsmentioning

confidence: 99%

Chemical recycling of polyesters

et al. 2019

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“…The terephthalic acid derivates further processed, modified even with biobased compounds such as oleic acid and cellulose derivates in separate reactions. [49][50][51][52][53][54][55] The omission of monomer extraction and utilizing oligomers that are mostly perceived as side products could considerably reduce the cost of PET derived unsaturated resins. One-pot type resin production has been considered before and it could prove to be an ideal solution to cut expenses.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Depolymerization and Polycondensation of PET Based Random Oligo- and Polyesters

et al. 2019

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The glycolysis of PET is a promising well-developed technique that could be utilized in a wide range of processes. Due to its equilibrial nature, the high ratio of reagents and the purification steps it is an expensive process. In this study our goal was to modify the standard glycolysis to an easily modulateable method (acido-alcoholysis) suited for one-pot oligoester, polyester synthesis. Adipic acid was added to the depolymerization reaction to connect low molecular weighed components into oligoesters. PET depolymerization reaction series were carried out with ethylene-glycol/adipic acid and butane-1,4-diol/ adipic acid to demonstrate the tuneability of these systems. The reaction products were thoroughly characterized with NMR, FTIR, TGA, DSC and functional group analysis. One-pot depolymerization-polycondensation reactions were engineered to produce unsaturated and saturated polyesters. The unsaturated polyesters were dissolved in styrene, cross-linked and moulded to be characterized with DMA. A decreasing tendency of the glass transition temperature and cross-link density were found in the function of the ratio of adipic acid used during the depolymerization step. Acido-alcoholysis proved to be a versatile technique that could be used to engineer oligoesters and polyesters. The reagent use can be minimalized, and the raw reaction products can be directly applied as mid-products.

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“…The effect of different methods for formulation and compounding of R-PET on the polymer chains and thermal profile was discussed. Furthermore, Naguib and Zhang reported how to use waste PET in obtaining new environmentally friendly polymeric material utilizing a natural material oleic acid [11]. They claimed a type of new cost-effective ecological R-PET was developed using PET waste bottles.…”

Section: Introductionmentioning

confidence: 99%

“…The diffraction change from V-PET to R-PET supports to assure the occurrence of the esterification reaction. The diffraction peaks indicate the polyester phase but with more amorphous character with R-PET [11]. R-PET has not yet been made widely available at a commercial, particularly in the mass market level.…”

Section: Introductionmentioning

confidence: 99%

An Investigation into the Performance Viability of Recycled Polyester from Recycled Polyethylene Terephthalate (R-PET)

Sun

2019

JTSFT

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The environmental impact of plastics has been made increasing concerns in recent years. Post-consumer plastic bottles created an environmental crisis. Polyester is a very versatile fibre material that has been widely used in the textile and fashion industry. However recycled polyester (R-PET)is not yet widely available at a commercial mass-market scale. Also, there is limited academic literature available on the performance characteristics of R-PET in textile form. This study attempts to compile a rounded evaluation of R-PET textiles derived from post-consumer plastic bottles, based on some objective tests related mainly to fabric mechanical properties. Tested samples are from two equivalent fabrics that were developed in this study -one is made of R-PET and the other the virginal polyester (V-PET). R-PET fabric showed very positive results in the tensile strength, abrasion resistance that provided promising potential to be used as a new feedstock for technical textiles, as well as fashion clothing. This will reduce waste to landfill or oceans. It can also reduce the use of new V-PET made of crude oils and reduce pollution and environmental impact.

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Advanced recycled polyester based on PET and oleic acid

Cited by 32 publications

References 19 publications

Chemical recycling of polyesters

Chemical recycling of polyesters

One-Pot Depolymerization and Polycondensation of PET Based Random Oligo- and Polyesters

An Investigation into the Performance Viability of Recycled Polyester from Recycled Polyethylene Terephthalate (R-PET)

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