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

Hibbs, Michael; Holtzclaw, Jeremy; Collard, David M.; Liu, Richard Y. F.; Hiltner, A.; Baer, E.; Schiraldi, David A.

doi:10.1002/pola.11075

Cited by 9 publications

(13 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, there is currently a growing interest in increasing the glass transition temperature (T g ) of PET to extend its use to new demanding applications such as the hot-filled and pasteurizedcontainer fields. [2][3][4] Moreover, PET is markedly hydrophobic and more resistant to hydrolysis than is usually needed in many of its most common applications. Despite being innocuous for humans, it is considered not to be an environmentally friendly material because of its non-renewable origin.…”

Section: Introductionmentioning

confidence: 99%

PET copolyesters made from ad-mannitol-derived bicyclic diol

et al. 2013

View full text Add to dashboard Cite

The carbohydrate-based bicyclic diol 2,4:3,5-di-O-methylene-D-mannitol (Manx) was made to react in the melt with ethylene glycol and dimethyl terephthalate to produce random PE x Manx y T copolyesters covering the whole range of molar compositions. The copolyesters had weight-average molecular weights in the 33 000-41 000 g mol À1 interval and were thermally stable up to nearly 380 C. They displayed T g in the 81 to 137 C range with values largely increasing with the content in Manx units. Copolyesters containing minor amounts of Manx were semicrystalline whereas those with contents equal to or more than 30% of Manx were amorphous. Stress-strain parameters were affected by composition, increasing tensile strength and elastic modulus and reducing elongation at break when introducing Manx units. These bio-based PET copolyesters showed enhanced susceptibility to hydrolysis.

show abstract

Section: Introductionmentioning

confidence: 99%

PET copolyesters made from ad-mannitol-derived bicyclic diol

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Water clusters can in turn impact the diffusion of water vapor through the polymer and increase their diffusion pathway. These observations are extensively described for the sorption of gas and water in glassy polymers. − The effect of water on polyethylene terephthalate (PET) is however not described in a systematic way over a wide range of temperatures and humidities.…”

Section: Introductionmentioning

confidence: 99%

Water Vapor Sorption Properties of Polyethylene Terephthalate over a Wide Range of Humidity and Temperature

et al. 2017

View full text Add to dashboard Cite

The dynamic and equilibrium water vapor sorption properties of amorphous polyethylene terephthalate were determined via gravimetric analysis over a wide range of temperatures (23-70 °C) and humidities (0-90% RH). At low temperature and relative humidity, the dynamics of the sorption process was Fickian. Increasing the temperature or relative humidity induced a distinct up-swing effect, which was associated with a plasticization/clustering phenomenon. For high temperatures and relative humidity, a densification of the polymer was evidenced. In addition to the classical Fickian diffusion, a new parameter was introduced to express the structural modifications of PET. Finally, two partial pressures were defined as thresholds that control the transition between these three phases. A simplified state diagram was finally proposed. In addition, the thermal dependence of these sorption modes was also determined and reported. The enthalpy of Henry's water sorption and the activation energy of diffusion were independent of vapor pressure and followed an Arrhenius law.

show abstract

“…Oligomeric PETA 3 aa is typically prepared by polycondensation of terephthaloyl acid/chloride with ethylenediamine and, in virtue of its thermal stability and flame retardancy, is conveniently used as charring agent for the synthesis of halogen‐free flame retardant polypropylene‐based composites [14a,b] . In order to establish strengths and limitations of the proposed methodology, other semi‐aromatic and fully‐aromatic PAs 3 of synthetic relevance were addressed by the iterative N‐acylation of diamines 1 with dialdehyde monomers 2 (Table 2).…”

Section: Resultsmentioning

confidence: 99%

Exploring Oxidative NHC‐Catalysis as Organocatalytic Polymerization Strategy towards Polyamide Oligomers

Ragno

Brandolese

Carmine

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

The polycondensation of diamines and dialdehydes promoted by an N‐heterocyclic carbene (NHC) catalyst in the presence of a quinone oxidant and hexafluoro‐2‐propanol (HFIP) is herein presented for the synthesis of oligomeric polyamides (PAs), which are obtained with a number‐average molecular weight (Mn) in the range of 1.7–3.6 kg mol−1 as determined by NMR analysis. In particular, the utilization of furanic dialdehyde monomers (2,5‐diformylfuran, DFF; 5,5’‐[oxybis(methylene)]bis[2‐furaldehyde], OBFA) to access known and previously unreported biobased PAs is illustrated. The synthesis of higher molecular weight PAs (poly(decamethylene terephthalamide, PA10T, Mn = 62.8 kg mol−1; poly(decamethylene 2,5‐furandicarboxylamide, PA10F, Mn = 6.5 kg mol−1) by a two‐step polycondensation approach is also described. The thermal properties (TGA and DSC analyses) of the synthesized PAs are reported.

show abstract

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

Cited by 9 publications

References 45 publications

PET copolyesters made from ad-mannitol-derived bicyclic diol

PET copolyesters made from ad-mannitol-derived bicyclic diol

Water Vapor Sorption Properties of Polyethylene Terephthalate over a Wide Range of Humidity and Temperature

Exploring Oxidative NHC‐Catalysis as Organocatalytic Polymerization Strategy towards Polyamide Oligomers

Contact Info

Product

Resources

About