Short Description:


Product Detail

Product Tags

Related Video

Feedback (2)

Our workforce through professional training. Skilled professional knowledge, solid sense of service, to fulfill the services demands of consumers for Cas 85-44-9 Manufactor , Methylbenzene Supply , Cas 71-36-3 , We look forward to supplying you with our products in the near future, and you will find our quotation is very reasonable and the quality of our products is very excellent!
Good Quality Modified Plastics Manufacturers - Polyethylene Terephthalate (PET) CAS 25038-59-9 High Quality And Low Price – Chemwin Detail:

Product Name:Polyethylene Terephthalate

Molecular format:C10H6O2

CAS No:25038-59-9

Product molecular structure:

Polyethylene Terephthalate

 

Chemical Properties:

Polyethylene terephthalate (PET) is a semi crystalline polymer possessing excellent chemical resistance, melt mobility and spinnability. The polymer is composed of repeating units as shown in the Figure 1. Each unit having a physical length of about 1.09 nm and a molecular weight of ~200. When it is produced from the reaction of terephthalic acid and ethylene glycol, it is capped on the left by H- and the right by –OH. Polymerization is thus accompanied by the production of water which is removed under elevated temperature and vacuum. Accordingly the presence of water in the molten state will rapidly depolymerize the structure so that thorough drying of the polymer prior to melt spinning of fibers is necessary.

The aromatic ring coupled with short aliphatic chain makes the polymer a stiff molecule as compared to other aliphatic polymers such as polyolefin or polyamide. The lack of segmental mobility in the polymer chains results in relatively high thermal stability. A textile grade polymer will have an average number of 100 repeat units per molecule so that the extended length of the typical polymer chain is about 100nm with a molecular weight about 20,000. Higher levels of polymerization produces higher strength fibers but the melt viscosity and stability of the melt to even tiny amounts of moisture causes hydrolytic degradation. The measurement of average degree of polymerization is done either by molten viscosity (by measuring the pressure drop through a calibrated orifice) or the viscosity of the diluted polymer in an appropriate solvent. The latter is measure of polymer chain length known as Intrinsic viscosity or IV and the value for a typical fiber grade polymer is 0.6 dl/g in 60/40 w/w mixture of phenol and tetrachloroethane solvent. The IV in the latter solvent is related to Mv (Viscosity average molecular weight) of the polymer by the Mark Howink equation (Equation 1).

 

Application:

Polyethylene terephthalate, commonly referred to by PET, is a member of the polyester family of polymers.The combination of properties like hardness and rigidity,dimensional stability, chemical resistance andlightweight, makes PET a flexible material widely used in several applications such as fibers, sheets, films,and beverage containers. Used in electrical parts including relay bases and lamp sockets, pump housings, gears, sprockets, chair arms, casters and furniture components.
Like other polyesters, PET is produced industrially by direct esterification of dicarboxylic acids with diols.Typical production processes are based on polymerization of ethylene glycol (MEG) with either purifiedterephthalic acid (PTA) or dimethyl terephthalate (DMT) in the presence of a metal catalyst.


Product detail pictures:

Good Quality Modified Plastics Manufacturers - Polyethylene Terephthalate (PET) CAS 25038-59-9 High Quality And Low Price – Chemwin detail pictures


Related Product Guide:

With our excellent administration, potent technical capability and strict top quality control technique, we go on to provide our consumers with trusted quality, reasonable price ranges and fantastic providers. We intention at becoming one among your most trusted partners and earning your fulfillment for Good Quality Modified Plastics Manufacturers - Polyethylene Terephthalate (PET) CAS 25038-59-9 High Quality And Low Price – Chemwin , The product will supply to all over the world, such as: Jordan, Jordan, Iceland, Till now, the items list has been updated regularly and attracted clients from around the globe. Comprehensive facts is often obtained in our web-site and you'll be served with premium quality consultant service by our after-sale group. They are likely to help you get thorough acknowledge about our goods and make a satisfied negotiation. Company go to to our factory in Brazil is also welcome at any time. Hope to obtain your inquiries for any pleased co-operation.
  • Wide range, good quality, reasonable prices and good service, advanced equipment, excellent talents and continuously strengthened technology forces,a nice business partner.
    5 Stars By Arthur from Ecuador - 2018.05.15 10:52
    The customer service staff's answer is very meticulous, the most important is that the product quality is very good, and packaged carefully, shipped quickly!
    5 Stars By Marcia from Orlando - 2018.06.28 19:27
    Write your message here and send it to us