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.
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.
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Very good knowledge
sir you tell so nicely and undertandingly please more and more videos do
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 nice sir. Your way of explanation is too good. Please make the another video related to these topics.
well explained. thank you sir
Nice lecture
Very well explained sir .thanks again
very good keep it up
Thnxx a lot sir. Inspiring 😍😍😍😍
NYC hai sir or bhejiye sir
Thank you sir ji
Well explained sir. Presently I'm also doing research on TPE blending but not able to do. Is it possible share contact for blending?
thank you sir
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.
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, 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.
What about the rubbers and glasses ?
Thank you sir
Thank you sir