Thermosetting plastics, Mechanical Engineering

Assignment Help:

Q. What do you mean by Thermosetting plastics?

This plastic undergoes a number of chemical changes on heating and cure to infusible and practically insoluble articles. The chemical change is not reversible thermosetting plastics do not soften on reheating and can not be reworked. They rather become harder due to completion of any left-over polymerization reaction. Eventually, at high temperatures, the useful properties of the plastic get destroyed. This is called degradation. The commonest thermosetting plastics are: alkyds, epoxides, polyesters, phenolics and urea.


Related Discussions:- Thermosetting plastics

Determine thermal efficiency of the cycle, (a) Compare otto, Diesel and Dua...

(a) Compare otto, Diesel and Dual combustion cycle on the basis of compression ratio, same compression ration and same Heat input and constant maximum pressure and heat supplied.

String vibration fixed ends, String Vibration Fixed Ends In case of the...

String Vibration Fixed Ends In case of the vibrations of a string, both its ends at  x = 0  and  x = L  may be permanently fixed;  y (x = 0) = 0 , and  y (x = L) = 0 at all  t

Determine the tension in the cord, Determine the tension in the cord: ...

Determine the tension in the cord: Two blocks containing the weights and positions illustrated in Figure rest on a frame which rotates around its vertical axis at a constant s

Construct of a diagonal scale, Construct of a diagonal scale: During c...

Construct of a diagonal scale: During construct of a diagonal scale of RF = 1/48, displaying yards, inches and feet to represent a maximum length of 7 yards. Scratch a distanc

Relation ship, what is the relation ship between tolrancr grade and manufac...

what is the relation ship between tolrancr grade and manufacturing process ?

Wrking cran, this is a problem for designing wrecking crane. there are 2 sc...

this is a problem for designing wrecking crane. there are 2 scenarios, one is when ball is held and one where its at maximum. i calculated the loads and now need to find the follow

First gear position -Shifting of Gears , First Gear Position : When gear M...

First Gear Position : When gear M1 is in mesh with gear C1 then this is first gear drive position. The gear C1 is freely attached to counter shaft, so gear C1 itself cannot rotate

Head loss, calculate the head required

calculate the head required

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd