Poly(ethylene terephthalate) copolymers with a smaller amount of poly(ethylene glycol)s and poly(butylene glycol)s

Kiyotsukuri, Tsuyoshi; Masuda, Tsuyoshi; Tsutsumi, Naoto; Sakai, Wataru; Nagata, Minoru

doi:10.1016/0032-3861(95)91211-o

Cited by 48 publications

(20 citation statements)

References 7 publications

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“…Whereas PET±poly(butylene glycol) copolymers were found to be resistant to 10% NaOH aqueous solution at 70°C for 4 h, PET copolymers containing similar amounts of poly(ethylene glycol) became completely dissolved in that period of time. 17 Such striking differences in behaviour should be ascribed to the high hydrophilicity distinguishing ethylene glycol containing polyethers. An opposite effect is obtained with the incorporation of dialkyldisubstituted alkanediols as a third component.…”

Section: Hydrolysis Of Unmodified and Modified Poly(ethylene Terephthmentioning

confidence: 99%

A review on the potential biodegradability of poly(ethylene terephthalate)

1999

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Section: Hydrolysis Of Unmodified and Modified Poly(ethylene Terephthmentioning

confidence: 99%

A review on the potential biodegradability of poly(ethylene terephthalate)

1999

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“…The main synthesis of TPE with terephthalic groups is based on the polycondensation of monomers (terephthalic acid, ethylene glycol, dimethylene terephthalate (DMT) and BHET) with reactive oligomers of low glass transition temperature. Poly(ethylene glycol), [27][28][29][30] poly(propylene glycol), [31,32] and poly-(tetramethylene glycol) [29,[33][34][35][36][37][38] are the most commonly used polyethers in polycondensation synthesis with PET monomers. Other compounds utilised include perfluoropolyether, [39][40][41] polyolefins, [42,43] or poly-(dimethyl siloxane).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Poly(ethylene terephthalate)‐block‐Poly(tetramethylene oxide) Copolymer by Direct Polyesterification of Reactive Oligomers

Saint‐Loup

Robin

Boutevin

2003

Macro Chemistry & Physics

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The object of this study was the synthesis of thermoplastic elastomer compounds by direct copolyesterification of reactive oligomers of poly(ethylene terephthalate) (PET) and of poly(tetramethylene oxide) (PTMO). PET was glycolysed to synthesise hydroxytelechelic oligomers of PET. Commercially available hydroxytelechelic PTMO was modified to synthesise carboxytelechelic oligomers. The chemical structures of these oligomers were investigated by 1H NMR and size exclusion chromatography. Multiblock poly(ester‐ether) was then obtained by polyesterification of the hydroxytelechelic and carboxytelechelic oligomers, using different catalysts and different reaction conditions. The best stoichiometric ratio was determined to lead to the highest Mn. The chemical structure of the synthesised poly(ester‐ether) was investigated by size exclusion chromatography and 1H NMR. The thermal and thermomechanical behaviour of the synthesised poly(ester‐ether) was investigated by differential scanning calorimetry and by dynamic mechanical analysis, and showed a thermoplastic elastomer behaviour. This product could also be an interesting way of chemically recycling PET waste.Polyesterification of hydroxytelechelic PET with carboxytelechelic PTMO.magnified imagePolyesterification of hydroxytelechelic PET with carboxytelechelic PTMO.

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“…This fact has initiated an idea of combining the degradability of aliphatic polyesters and the superior mechanical properties of aromatic polyesters to achieve novel copolyesters. This concept has been employed in improving degradability of PET [4][5][6][7][8][9][10], poly(propylene terephthalate) (PPT) [10][11][12], Poly(butylene terephthalate) (PBT) [10,[13][14], and poly(1,2-propanediyl phthalate) (PPP) [15] by incorporating diols and/or diacids into their main chains. The results revealed that the degradation rate of the resulting copolymers was influenced by the content of aromatic constituents [10,13], chemical structures, i.e., random, block or alternating structure, solid state structure (semicrystalline or amorphous), and chain mobility [14].…”

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Effects of synthesis conditions on chemical structures and physical properties of copolyesters from lactic acid, ethylene glycol and dimethyl terephthalate

Opaprakasit

Petchsuk²,

Opaprakasit³

et al. 2009

Express Polym. Lett.

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Lactic acid/ethylene terephthalate copolyesters were synthesized by the standard melt polycondensation of lactic acid (L), ethylene glycol (EG) and dimethyl-terephthalate (DMT). Effects of reaction temperatures and types of catalysts on the structures and properties of the copolymers were examined. In addition, feasibility of promoting the copolymerization process by a novel synthesis step of using thermo-stabilizers was investigated. The results show that a reaction temperature of higher than 180°C is necessary to produce copolymers with appreciable molecular weight. However, degradation was observed when the reaction temperature is higher than 220°C. Triphenyl phosphate (TPP) shows promising results as a potential thermo-stabilizer to minimize this problem. It was found that Sb2O3 and Tin(II) octoate are most effective among 4 types of catalysts employed in this study. 1H-NMR results indicate that copolymers have a random microstructure composed mainly of single L units alternately linked with ET blocks at various sequential lengths. The longer ET sequence in the chain structure leads to the increase in melting temperature of the copolymer. TGA results show that the resulting copolymers possessed greater thermal stability than commercially-available aliphatic PLA, as a result of the inclusion of T (terephthalate) units in the chain structure

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Poly(ethylene terephthalate) copolymers with a smaller amount of poly(ethylene glycol)s and poly(butylene glycol)s

Cited by 48 publications

References 7 publications

A review on the potential biodegradability of poly(ethylene terephthalate)

A review on the potential biodegradability of poly(ethylene terephthalate)

Synthesis of Poly(ethylene terephthalate)‐block‐Poly(tetramethylene oxide) Copolymer by Direct Polyesterification of Reactive Oligomers

Effects of synthesis conditions on chemical structures and physical properties of copolyesters from lactic acid, ethylene glycol and dimethyl terephthalate

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