Synthesis of a secondary plasticizer for poly(vinyl chloride) by recycling of poly(ethylene terephthalate) bottle waste through aminolytic depolymerization

Shukla, S. R.; Kapadi, Parag U.; Mhaske, S. T.; Mali, Manoj; More, Aarti P.

doi:10.1002/vnl.21494

Cited by 10 publications

(8 citation statements)

References 19 publications

(21 reference statements)

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“…Due to their potential applications, two groups of reactive, N-substituted terephthalamides containing the OH or amino groups are of particular interest to researchers. The first of them are the products of the reaction between PET and alkanolamines, for example ethanolamine [136,145,146,[148][149][150][151][152][153][154][155], 3-amino-1-propanol [155,156], 2-amino-2-methyl-1-propanol [157], 1-amino-2-propanol [157] and diethanolamine [158]. On the other hand the amino functionality can be introduced by using bifunctional degradation agents like hydrazine [159,160] and its homologues with the C2-C6 alkane chains [145,146,161], aliphatic diamines containing aromatic rings (e.g.…”

Section: Ammonolysis and Aminolysis Of Petmentioning

confidence: 99%

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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: Ammonolysis and Aminolysis Of Petmentioning

confidence: 99%

“…- PVC plasticizers (e.g. hydrazine derivative [165] or products of the reaction between ω-hydroxyphthalamides and C7-C10 alkane acids [136,155]); - thermal stabilizing additives for PVC [137] and LDPE [166];…”

Section: T a B L E 1 Reaction Conditions And Yields Of Pet Ammonolysismentioning

confidence: 99%

Chemical recycling of polyesters

et al. 2019

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“…The plasticizers mainly used in PVC are phthalates, e.g. dibutyl phthalate (DBP), dioctyl phthalate (DOP) [61], diisodecyl phthalate (DIDP) and di(2-ethylhexyl) phthalate (DEHP) [62,63]. There are also many bio-based plasticizers [64][65][66][67], in which the soybean oil and the epoxidizes soybean oil (ESBO) and the acetic acid ester (AAE) are the most common [68,69].…”

Section: Materials and Equipmentmentioning

confidence: 99%

Laser markability of PVC coated automotive electric cables

Bitay¹

2019

Express Polym. Lett.

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This article describes the test results for laser markability of automotive electrical cables. The insulation is PVC, but the colour and construction of the insulations are different. Two types of laser workstations were used, one with a wavelength of 1064 nm and another with 532 nm. The penetration depth of the laser beam was determined by optical microscopy on cross sections. The 1064 nm laser beam can mark all investigated materials with good contrast, except the yellow insulation. The 532 nm laser beam with fast speed can hardly produce contrast with any of the materials. The laser markability of the yellow insulation was found to be the most problematic. On the two-layer insulation, despite the whitening of the inner material, dark marking is produced because the heat developing on the interface of the two layers will heat up and carbonize the transparent layer.

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“…N,N′‐dihydroxoethyl terephthalamide and N,N′‐diaminoethyl terephthalamide are the most studied organic compounds for various applications owing to the presence of reactive ─OH and ─NH 2 end groups. End products of chemical depolymerization of PET waste have also been used as plasticizers for PVC formulations . Largely, the synthesis methods involve high temperature and pressure conditions along with toxic and expensive catalytic systems, which are questionable in terms of commercial viability of the developed process; therefore, greener routes for chemical depolymerization are becoming point of concern .…”

Section: Introductionmentioning

confidence: 99%

Prevention of poly(vinyl chloride) degradation through organic terephthalamides generated from poly(ethylene terephthalate) waste

Verma

Soni

Teotia

2019

J of Applied Polymer Sci

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The use of organic compounds as thermal stabilizers for poly(vinyl chloride) (PVC) stabilization is the current state of art worldwide owing to their high efficiency and nontoxic residues after degradation. Terephthalamide, N,N′‐dimethylterephthalamide and N,N′‐dibutylterephthalamide have been prepared via depolymerization of poly(ethylene terephthalate) through an economical and environmentally friendly approach. These compounds have been examined as thermal stabilizers for PVC formulations and found to exhibit high thermal stabilizing effects. Thermal stability measurements were performed using conventional Congo red test method. Color change experiments were conducted by heating the samples at 200 °C in air, and the colored compounds formed were extracted and compared with the help of UV–visible spectroscopy. Fourier transform infrared spectroscopic studies of organic terephthalamides incorporated PVC samples have been performed in order to insight the probable mechanistic aspects involved in thermal stabilization process. Thermogravimetric analysis (TGA) thermograms of PVC sheets loaded with 10 wt % organic terephthalamides have been recorded and were found stable below 200 °C. SEM and energy dispersive X‐ray analysis of char residues of TGA samples were performed supporting the proposed thermal stabilizing action of the organic terephthalamides. Furthermore, specific gravity and mechanical performance of the PVC sheets have also been reported assisting in finding suitable commercial applications of PVC formulations. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48022.

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Synthesis of a secondary plasticizer for poly(vinyl chloride) by recycling of poly(ethylene terephthalate) bottle waste through aminolytic depolymerization

Cited by 10 publications

References 19 publications

Chemical recycling of polyesters

Chemical recycling of polyesters

Laser markability of PVC coated automotive electric cables

Prevention of poly(vinyl chloride) degradation through organic terephthalamides generated from poly(ethylene terephthalate) waste

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