Poly(ethylene terephthalate)

• CAS: 25038-59-9
• Catalog Number: ACM25038599-5
• Category: Main Products
• Molecular Weight: 228.2g/mol
• Molecular Formula: (C10H8O4)n
• Description: A common thermoplastic polyester in daily life, it has excellent toughness, tensile strength, impact strength, abrasion resistance and electrical insulation.
• IUPAC Name: ethane-1,2-diol;terephthalic acid
• Canonical SMILES: OCCO.OC(=O)c1ccc(cc1)C(O)=O
• InChI: InChI=1S/C8H6O4.C2H6O2/c9-7(10)5-1-2-6(4-3-5)8(11)12;3-1-2-4/h1-4H,(H,9,10)(H,11,12);3-4H,1-2H2
• InChI Key: FYIBGDKNYYMMAG-UHFFFAOYSA-N
• Melting Point: 250-255 °C
• Density: 1.68 g/mL at 25 °C
• Appearance: Off White Pellets
• Application: Polyethylene terephthalate is an excellent waterproof and moisture-proof material. Plastic bottles made of PET are used for mineral water and carbonated soft drinks. Its high mechanical strength makes PET film an ideal choice for tape applications. Its chemical inertness and other physical properties make it suitable for food packaging. Other packaging applications include rigid cosmetic cans, microwave containers, transparent films, etc.; PET has a wide range of applications in the textile industry. Polyester fabric is both sturdy and flexible. Polyester fiber fabric is lightweight, windproof, resistant to resistance, and more tear resistant. PET monofilament is mainly used for making mesh fabrics; Polyethylene terephthalate has good electrical insulation performance, high structural and dimensional stability. These advantages enable its use in the electrical and electronic industries. It is an effective polymer that can replace die-casting metals and thermosetting materials in applications; PET is used to manufacture parts in the automotive industry, such as engine hoods and connectors.Used in electrical parts including relay bases and lamp sockets, pump housings, gears, sprockets, chair arms, casters and furniture components.
• Color/Form: Offered as oriented film or fiber
• Complexity: 175
• Contains: 30% glass particles as reinforcer
• Covalently-Bonded Unit Count: 2
• Decomposition: When heated to decomposition it emits acrid smoke and irritating fumes.
• EC Number: 607-507-1
• Exact Mass: 228.063388g/mol
• Features And Benefits: Balance of strength, stiffness and toughness, excellent electrical properties, surface appearance and chemical resistance.
• Form: granular
• Formal Charge: 0
• H-Bond Acceptor: 6
• H-Bond Donor: 4
• Heavy Atom Count: 16
• MDL Number: MFCD00084422
• Monoisotopic Mass: 228.063388g/mol
• NACRES: NA.23
• Other Experimental: Tenacity is 2.2-4 g/denier as staple and up to 9.0 g/denier as continuous filament.;Has good electrical resistance and low moisture absorption.
• Packaging: 250 g in poly bottle
• PubChem ID: 24866846
• Quality Level: 100
• Rotatable Bond Count: 3
• Storage Temperature: 2-8°C

Case Study

Chemical Modification of Polyethylene Terephthalate

Chen, Wei, and Thomas J. McCarthy. Macromolecules 31.11 (1998): 3648-3655.

The reaction of semicrystalline polyethylene terephthalate (PET) films with ester-selective reagents at the film-solution interface can be controlled to produce modified film samples containing a reagent-induced thin (less than 40 Å) surface layer. Hydrolysis of PET produces a surface mixture of alcohol and carboxylic acid groups. Reduction with lithium aluminum hydride and transesterification with ethylene glycol (glycolysis) both produce surfaces with alcohol functional groups (PETOH and PET-OH, respectively). Each of these modification reactions involves chain scission and can result in significant sample degradation (reactive dissolution); for each modification reaction, conditions were optimized to maximize conversion and minimize degradation. The reactivity of the surface alcohol (PET-OH) was evaluated for samples prepared by reduction and glycolysis, and a comparative analysis was performed: the presence of benzyl alcohol in the reduced samples, the absence of benzyl alcohol in the glycolysis samples, and the difference in surface alcohol concentration between the two surfaces (the surface density of alcohols on PET-OH is approximately 2-fold higher than that on PET-OH) affected the reactivity.
A PET film sample (1 × 5 cm) was placed in a flask containing 25 mL of 1 M NaOH that had been equilibrated in a thermostatic bath to the desired temperature for at least 1 hour. After the desired reaction time, the film sample was removed with tweezers and rinsed sequentially with 0.1 M HCl, two equal parts of water, methanol, and hexane, and then dried under reduced pressure (0.02 mm, room temperature, 24 hours). 25 mL of THF was added to the Schlenk tube containing the clean PET film sample. After 4.5 hours at room temperature, the solvent was removed and the film was dried (0.02 mm, room temperature, 24 hours). A THF solution of LiAlH (desired concentration) was added (25 mL). After the desired reaction time at the desired reaction temperature, the film was washed sequentially with THF (two equal parts), water, 0.1 M HCl, water (two equal parts), methanol, and hexane, and then dried (0.02 mm, room temperature, 24 hours).

Conductivity studies of Poly(ethylene terephthalate)

Taylor, D. M., and T. J. Lewis. Journal of Physics D: Applied Physics 4.9 (1971): 1346.

The conductivity of poly(ethylene terephthalate) and, to a lesser extent, polyethylene in the range up to 1.2 x 10^6 V cm-1 was studied. The current was found to decay with time according to an inverse power law, but this could be avoided by a conditioning procedure that allowed stable current values to be measured over a range of temperatures and fields. The results show that the current has a field-dependent activation energy. Agreement with the experiment was obtained by adopting a more general form of the barrier than the Coulomb barrier form usually chosen in Schottky's law. The form of the barrier chosen seems to refer to the cathode-dielectric interface and is probably determined by the space charge in the dielectric. For an aluminum electrode, the metal-dielectric contact potential values for the polyethylene terephthalate and polyethylene samples studied were 2.58 and 2.14 eV, respectively. This suggests that the time dependence observed before the conditioning is complete is due to the slow establishment of a complete interface barrier.
Performed on nominal PET films, some measurements were also performed on 38 pm polyethylene films. The aim of sample preparation is to avoid physical and chemical damage as much as possible. Typically 3 cm diameter discs of film are cut from a large block, gently wiped with soft paper moistened with methanol to remove surface grease, and then placed in a vacuum chamber maintained at a pressure of less than 10-5 Torr. Here, trace amounts of methanol and water vapor and other volatile additives used in the original preparation of the film are removed. Aluminum or gold is then evaporated to form a circular measuring electrode with an area of 0.75 cm2, concentric guard rings on one side of the film and a single large counter electrode on the other side. The prepared film is then mounted in a temperature-controlled holder and transferred to a second vacuum chamber, again maintained at a pressure of less than 10^-5 Torr, where the conductivity measurement can be performed.

Custom Q&A

What is the product name of this material?

The product name is Poly(ethylene terephthalate).

What is the IUPAC Name of Poly(ethylene terephthalate)?

The IUPAC Name is ethane-1,2-diol;terephthalic acid.

What is the Molecular Weight of Poly(ethylene terephthalate?

The Molecular Weight is 228.2g/mol.

What is the appearance of Poly(ethylene terephthalate?

The appearance is off white pellets.

What are the features and benefits of Poly(ethylene terephthalate?

It has a balance of strength, stiffness and toughness, excellent electrical properties, surface appearance, and chemical resistance.

What is the application of Poly(ethylene terephthalate in the textile industry?

Polyester fabric made from Poly(ethylene terephthalate) is sturdy and flexible, lightweight, windproof, resistant to resistance, and tear-resistant.

What percentage of glass particles does Poly(ethylene terephthalate) contain as a reinforcer?

It contains 30% glass particles as a reinforcer.

What is the density of Poly(ethylene terephthalate)?

The density is 1.68 g/mL at 25 °C.

What is the storage temperature recommended for Poly(ethylene terephthalate)?

The recommended storage temperature is 2-8°C.

What are some packaging applications of Poly(ethylene terephthalate)?

It is used for rigid cosmetic cans, microwave containers, transparent films, and food packaging due to its chemical inertness and physical properties.