There are two kinds of polyesters that each lead to thermoplastic or thermosetting products. The difference between the two kinds of polyester is their chemical structures. Thermoplastic polyester, like PET, is made from polymerization (polycondensation) of diacids (HOOC-R-COOH) and dialcohol (HO-R’-OH), producing linear chain macromolecules of polyesters and water. This kind of polyesters are used as synthetic fibers as well as plastic parts. Whereas, in thermosetting unsaturated polyesters, diacids are reacting with multifunctional alcohols, like glycerin, and monomers including unsaturated bonds. Thus, macromolecular chains grow in a 3D network with production of chemical crosslinks between chains. The resulting structure is not linear, but a 3-dimensional network. Because of this 3D network, this kind of polyester does not melt when heated, is cured and permanently remains solid. They are not used alone, are sued as a matrix (continuous) phase with reinforcing fibers and particulate materials. I hope its clear now.
Dear sir, I want you to give a lecture on making a thermoplastic mask, which is used in in the area of medical health specially used while performing the radiotherapy to the patient suffering with cancer.
sir you tell so nicely and undertandingly please more and more videos do
Very nice sir. Your way of explanation is too good. Please make the another video related to these topics.
excellent sir.i just like way u explained.one more thing question why is too good sir thank u wondrefull class.make more subjects
Very good knowledge
Thnxx a lot sir. Inspiring 😍😍😍😍
Very well explained sir .thanks again
well explained. thank you sir
Nice lecture
very good keep it up
sir, u said that thermoset has irreversibility due 3-D structure but polyester has a linear structure so why it is not showing reversible response?
There are two kinds of polyesters that each lead to thermoplastic or thermosetting products. The difference between the two kinds of polyester is their chemical structures.
Thermoplastic polyester, like PET, is made from polymerization (polycondensation) of diacids (HOOC-R-COOH) and dialcohol (HO-R’-OH), producing linear chain macromolecules of polyesters and water. This kind of polyesters are used as synthetic fibers as well as plastic parts.
Whereas, in thermosetting unsaturated polyesters, diacids are reacting with multifunctional alcohols, like glycerin, and monomers including unsaturated bonds. Thus, macromolecular chains grow in a 3D network with production of chemical crosslinks between chains. The resulting structure is not linear, but a 3-dimensional network. Because of this 3D network, this kind of polyester does not melt when heated, is cured and permanently remains solid. They are not used alone, are sued as a matrix (continuous) phase with reinforcing fibers and particulate materials.
I hope its clear now.
Well explained sir. Presently I'm also doing research on TPE blending but not able to do. Is it possible share contact for blending?
Sir which type of plastic is not melt at higher temperature like sterilization process
sir how plastic are welded
vikramsinh bhopale plastic welded to the help of hot stamping mc or electrode
pagal ta ki.
NYC hai sir or bhejiye sir
Thank you sir ji
thank you sir
What about the rubbers and glasses ?
Dear sir,
I want you to give a lecture on making a thermoplastic mask, which is used in in the area of medical health specially used while performing the radiotherapy to the patient suffering with cancer.
Thank you sir
Thank you sir