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Reasonable price for Modified Plastics Factory - 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.


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Reasonable price for Modified Plastics Factory - Polyethylene Terephthalate (PET) CAS 25038-59-9 High Quality And Low Price – Chemwin detail pictures


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continue on to further improve, to make sure product top quality in line with market and consumer standard requirements. Our firm has a excellent assurance program have already been established for Reasonable price for Modified Plastics Factory - Polyethylene Terephthalate (PET) CAS 25038-59-9 High Quality And Low Price – Chemwin , The product will supply to all over the world, such as: Senegal, French, Munich, Aiming to grow to be by far the most professional supplier within this sector in Uganda, we keep researching on the creating procedure and raising the high quality of our principal goods. Till now, the merchandise list has been updated on a regular basis and attracted customers from around the globe. Detailed data can be obtained in our web page and you'll be served with good quality consultant service by our after-sale team. They're going to allow you to get complete acknowledge about our items and make a satisfied negotiation. Small business check out to our factory in Uganda can also be welcome at any time. Hope to obtain your inquiries to get a happy co-operation.
  • After the signing of the contract, we received satisfactory goods in a short term, this is a commendable manufacturer.
    5 Stars By Nick from Somalia - 2017.11.11 11:41
    We have been appreciated the Chinese manufacturing, this time also did not let us disappoint,good job!
    5 Stars By Quyen Staten from Islamabad - 2017.11.29 11:09
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