A new development in polyesters derived from terephthalic acid: A polyether ester based on polyethylene terephthalate

Ijzermans, A. B.; Pluijm, F. J.; Huntjens, F. J.; Repin, Johannes F.

doi:10.1002/pi.4980070402

Cited by 4 publications

(3 citation statements)

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“…However, in contrast to the results of IJzermans et al 9, the chemical stability of the PO4-based poly(ether ester)s is now considered to be inferior to that of PBT 4. The chemical stability of PVL-based poly(ether ester)s and the changes in mechanical properties were studied and the results obtained were related to those determined for PBT.…”

Section: Chemical Stabilitycontrasting

confidence: 53%

Mechanical properties and chemical stability of pivalolactone-based poly(ether ester)s

Tijsma

Does

Bantjes

et al. 1994

Polymer

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The processing, mechanical and chemical properties of poly(ether ester)s, prepared from pivalolactone (PVL), 1,4-butanediol (4G) and dimethyl terephthalate (DMT), were studied. The poly(ether ester)s could easily be processed by injection moulding, owing to their favourable rheological and thermal properties. The tensile response of a poly(ether ester) with a butylene terephthalate (4GT) content of 72 mol%, which exhibited the phenomena of necking and strain-hardening, was related to the morphology of these copolymers. The influence of the short 4G-PVL segments was reflected in a high Young's modulus and yield stress, and resulted in a tough behaviour for the poly(ether ester), with an ultimate elongation of 500%. The poly(ether ester)s were stable towards treatment at room temperature with water or weakly acidic or alkaline solutions. Conditioning at 90°C in water for 264 h resulted in a water uptake of 1 wt%, whereas the rate of hydrolysis was 0.0003 (expressed in At/re~ h-t) for the poly(ether ester) with a 4GT content of 72 mol%. Although a decay in the mechanical properties for the PVL-based poly(ether ester) after exposure to water at 90°C was observed, these materials were assumed to have a higher hydrolytical stability than other poly(ether ester)s.

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Section: Chemical Stabilitycontrasting

confidence: 53%

Mechanical properties and chemical stability of pivalolactone-based poly(ether ester)s

Tijsma

Does

Bantjes

et al. 1994

Polymer

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“…The ethylene glycol-or 2G-based copolymer ( Table II ) closely resembles the 4G-based copolymer in having a high melting point, even higher than the 4G copolymer, and excellent tensile and tear strengths. The 2G-based copolymer suffers from having a rather slow rate of crystallization (8,12). Poly (ethylene terephthalate ) homopolymer suffers from similar Synthesis of the 2G-based copolymer can be somewhat more difficult than synthesis of the analogous 4G-based copolymer.…”

Section: Ethylenementioning

confidence: 99%

Elastomeric Polyether-Ester Block Copolymers

Wolfe

1979

Advances in Chemistry

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Physical properties are related to ester-segment structure and concentration in thermoplastic poly ether-ester elasto mers prepared by melt transesterification of poly(tetramethylene ether) glycol with various diols and aromatic diesters. Diols used were 1,4-benzenedimethanol, 1,4-cyclohexanedimethanol, and the linear, aliphatic α,ω-diols from ethylene glycol to 1,10-decane-diol.Esters used were terephthalate, isophthahte, 4,4'-biphenyldicarboxylate, 2,6-naphthalenedicarboxylate, and m-terphenyl-4,4'-dicarboxylate. Ester-segment structure was found to affect many copolymer properties including ease of synthesis, molecular weight obtained, crystallization rate, elastic recovery, and tensile and tear strengths.Tnterest in polyether-ester block copolymers that are both thermoplastic · * • and elastomeric continues at a sustained pace (1-9). Most of the recent communications have dealt with the tetramethylene terephthalate/ poly(tetramethylene ether) terephthalate copolymers which are continu ing to find increased use in commercial applications requiring thermo plastic elastomers with superior properties. Part I of this series explored the structure-property relationships of tetramethylene terephthalate/polyether terephthalate copolymers as a function of variations in the chemical structure, molecular weight, and concentration of the polyether units (10). Of the polyether monomers tested, poly (tetramethylene ether) glycol of molecular weight approxi mately 1000 was found to provide copolymers having the best overall combination of physical properties and ease of synthesis. 0-8412-0457-8/79/33-176-129$05.75/0 In Multiphase Polymers; Cooper, S., et al.; Advances in Chemistry; American Chemical Society: Washington, DC, 1979.130 MULTIPHASE POLYMERSThe work reported here is concerned with the syntheses and proper ties of polyether-ester block copolymers containing poly ( tetramethylene ether) units of molecular weight of approximately 1000 as the amorphous polyether blocks and a variety of esters as the crystallizable hard segments.The purpose of this study is to correlate changes in synthesis and proper ties of these thermoplastic and elastomeric copolymers with changes in the concentration and nature of the ester segments, particularly the types of diol and diacid. ExperimentalNomenclature. Poly(tetramethylene ether) glycol having a num ber-average molecular weight of approximately 1000 is coded as PTME glycol. The straight-chain, «,ω-diols are coded as 2G, 3G, . . . , 10G where the numerals represent the number of methylene groups between terminal hydroxyls. Thus 2G is ethylene glycol; 5G is 1,5-pentanediol; and 10G is 1,10-decanediol. 1,4-Cyclohexanedimethanol is coded as CD. Terephthalate is coded as T. CDT represents 1,4-cyclohexanedimethylene terephthalate. 4GT represents tetramethylene terephthalate.Copolymer compositions are expressed as weight percentages of the ester units with the remainder being polyether-ester units. For instance, 40% tetramethylene terephthalate/PTME terephthalate copolymer rep resents a b...

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“…As part of our continuing efforts to enhance our understanding of block copoly(ether ester)s and block copoly(ester ester)s, [8][9][10][11] we have continued our study of the PET-POTM block copolymer. The objective of our study was, first, to modify the elastomer in order to influence its crystallization rate and, second, to determine changes in dynamic-mechanical properties in relation to the different crystallinities obtained after injection molding.…”

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confidence: 99%

Influencing the crystallization behavior of PET‐based segmented copoly(ether ester)

Zeilstra

1986

J of Applied Polymer Sci

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SynopsisSegmented copoly(ether ester) based on poly(ethy1ene terephthalate) and poly(oxytetramethylene) suffers from having a rather low rate of crystallization. "he crystallization behavior of this elastomer can be influenced by cocondensation of selected diols and addition of nucleating agents and plasticizers. Changes of the crystallinity and morphology are studied by differential scanning calorimetry and dynamic-mechanical analysis, respectively. Mechanical properties in relation to the different crystallinites obtained are reported.

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A new development in polyesters derived from terephthalic acid: A polyether ester based on polyethylene terephthalate

Cited by 4 publications

References 4 publications

Mechanical properties and chemical stability of pivalolactone-based poly(ether ester)s

Mechanical properties and chemical stability of pivalolactone-based poly(ether ester)s

Elastomeric Polyether-Ester Block Copolymers

Influencing the crystallization behavior of PET‐based segmented copoly(ether ester)

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