Polyesteramides based on PET and nylon 2,T

Bouma, K.; Groot, G.M.M.; Feijén, Jan; Gaymans, R.J.

doi:10.1016/s0032-3861(99)00480-2

Cited by 13 publications

(9 citation statements)

References 22 publications

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“…Considerable research has been done to discover and develop diacids and diols comonomers, that can raise the T g without sacrificing the key useful properties of these polyesters 3. The addition of amide units to the polyester backbone to enhance the crystallization rates and improve the chemical resistance has been widely studied 10. Even though some diamines can very effectively raise T g ,11 significant discoloration occurs during the polycondensation process 6…”

Section: Introductionmentioning

confidence: 99%

Poly(ethylene terephthalate), modified with bisphenol S units, with increased glass transition temperature

Lotti¹,

Colonna²,

Fiorini³

et al. 2012

J of Applied Polymer Sci

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Novel copolyesters have been prepared by melt mixing poly(ethylene terephthalate) (PET) with an ethoxylated bisphenol S, with the aim to prepare new polyesters with increased Tg, to be used in a wider range of temperatures with respect to neat PET. No side reactions occur during the synthesis of the samples, as proved by NMR analysis. The insertion of the bisphenol S (sulfonyldiphenol) groups does not significantly alter the thermal stability of PET. The thermal analysis showed that Tm and crystallization rate of the copolymers decreased with incasing co‐unit content. The Tg of the copolyesters can be increased by bisphenol S insertion, up to 40°C higher with respect to neat PET, that allows the use of amorphous PET in a wider range of applications. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Section: Introductionmentioning

confidence: 99%

Poly(ethylene terephthalate), modified with bisphenol S units, with increased glass transition temperature

Lotti¹,

Colonna²,

Fiorini³

et al. 2012

J of Applied Polymer Sci

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“…Poly(ester amide)s constitute an interesting group of potentially biodegradable materials9–12 since strong intermolecular hydrogen‐bond interactions may be established through their amide groups. The mechanical properties can consequently been enhanced, whereas the presence of labile ester groups in the main chain can assure degradability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Poly(glycolic acid‐alt‐6‐aminohexanoic acid) and Poly(glycolic acid‐alt‐11‐aminoundecanoic acid)

Vera

Franco

Puiggalı́

2004

Macro Chemistry & Physics

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Summary: Poly(ester amide)s derived from glycolic acid and ω‐amino acid units, such as aminohexanoic or aminoundecanoic acids, are synthesized by a thermal polycondensation reaction that involves the formation of metal halide salts. Polymerization kinetics of different metal salts are studied by isothermal and nonisothermal methods and the corresponding parameters compared. The condensation reaction begins in the solid state for the aminohexanoic derivatives, although a rapid liquefaction is observed. On the other hand, the melting temperatures of the sodium and the potassium chloroacetylaminoundecanoate salts are lower than the reaction temperatures, and consequently polycondensation proceeds fully in the liquefied state. These polymers are characterized by an alternate disposition of ester and amide groups and can be obtained with high molecular weights and short polymerization times. Thermal properties (glass transition and melting temperatures) of the two new polymers are determined and compared. Thermal stability is also investigated; the results indicated that decomposition temperatures were always far from both reaction and polymer fusion temperatures.DSC heating scans performed at different rates for potassium chloroacetylaminoundecanote.magnified imageDSC heating scans performed at different rates for potassium chloroacetylaminoundecanote.

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“…Complete randomization of a molten alternating poly(ester amide) can take several hours, and the formation of amide blocks can be controlled by the minimization of the time for which the polymer is at high temperatures. 18 Bouma et al [15][16][17] prepared copolymers of bisester diamides in PET with no detectable large amide segments with a short melt polymerization followed by a solid-state postcondensation. Bisester diamide monomer TpT is based on a central diamine with terephthalate-type units attached to either end, so ester-amide interchange reactions in a PET polymerization will only affect amide block lengths and not the structure of the TpT triad bisester diamide unit.…”

Section: Methodsmentioning

confidence: 99%

“…Bisester diamides have been used to prepare alternating poly(ester amide)s [13][14][15][16][17] as well as polyester-type materials with small amounts of randomly distributed diamide units. 18 -23 Gaymans and coworkers [13][14][15][16]18,19,[21][22][23] have shown that modifying PET with N,NЈ-bis-[4(methoxycarbonyl)phenylcarboxy]-1,2-ethanediamine (T2T) improves a number of thermal and mechanical properties. In particular, it is proposed that self-assembly of the amide units through hydrogen bonding leads to an increase in the rate of crystallization from the melt.…”

Section: Introductionmentioning

confidence: 99%

Poly(ethylene terephthalate) modified with aromatic bisester diamides: Thermal and oxygen barrier properties

Hibbs

Holtzclaw

Collard

et al. 2004

J. Polym. Sci. A Polym. Chem.

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The synthesis and properties of poly(ethylene terephthalate) (PET) copolymers containing four bisester diamide structural units are reported. Two of the bisester diamides consist of three para-substituted aromatic rings, and the other two consist of three meta-substituted aromatic rings. The copolymers have been characterized by nuclear magnetic resonance, differential scanning calorimetry, and dilute solution viscometry. Three of the copolymers can be compression-molded into amorphous films for oxygen barrier testing, and one of these three films can be oriented for additional barrier testing. The three amorphous films all have lower permeabilities than unoriented PET. However, this difference diminishes upon the orientation of the polymer films.

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Polyesteramides based on PET and nylon 2,T

Cited by 13 publications

References 22 publications

Poly(ethylene terephthalate), modified with bisphenol S units, with increased glass transition temperature

Poly(ethylene terephthalate), modified with bisphenol S units, with increased glass transition temperature

Synthesis and Characterization of Poly(glycolic acid‐alt‐6‐aminohexanoic acid) and Poly(glycolic acid‐alt‐11‐aminoundecanoic acid)

Poly(ethylene terephthalate) modified with aromatic bisester diamides: Thermal and oxygen barrier properties

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