Short Description:


Product Detail

Product Tags

Related Video

Feedback (2)

As a result of ours specialty and service consciousness, our company has won a good reputation among customers all over the world for Methyl Methacrylate Chemical Raw Materials , Cas 78-93-3 , Polymeric Mdi Supply , Let's cooperate hand in hand to jointly make a beautiful future. We sincerely welcome you to visit our company or contact us for cooperation!
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:

Fast and superior quotations, informed advisers to help you choose the correct merchandise that suits all your requirements, a short generation time, responsible quality control and different services for paying and shipping affairs 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: Monaco, kazan, Bangladesh, Our company absorbs new ideas, strict quality control, a full range of service tracking, and adhere to make high-quality solutions. Our business aims to honest and trustworthy, favorable price, customer first, so we won the trust of the majority of customers! If you are interested in our items and services, please do not hesitate to contact us!
  • We feel easy to cooperate with this company, the supplier is very responsible, thanks.There will be more in-depth cooperation.
    5 Stars By Pearl Permewan from Paraguay - 2018.09.16 11:31
    The factory has advanced equipment, experienced staffs and good management level, so product quality had assurance, this cooperation is very relaxed and happy!
    5 Stars By Jill from London - 2017.04.28 15:45
    Write your message here and send it to us