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

Explain the information phase of radial drilling machine, Information Phase...

Information Phase: Step: To secure all and complete information and gather facts and from best sources.   Our project is selected based on the current problem face by the

Aerospace engineering, An airfoil of surface area 1.5 ft2 is tested for lif...

An airfoil of surface area 1.5 ft2 is tested for lift L in a wind tunnel. At an angle of attack of 7° with standard air of density 0.0024 slugs/ft3 at a speed of 90 ft/sec, the lif

Show general properties of castings, Q. Show General Properties of Castings...

Q. Show General Properties of Castings? 1. Fe-Cr (10-30%Cr) alloys offer good resistance to oxidation, low strength at elevated temps, restricted to use in oxidizing or reducin

Explain about nonconforming material, Q. Explain about Nonconforming Materi...

Q. Explain about Nonconforming Material? If PMI test results indicate that the material or item does not meet the specified composition of the alloy, the subject material/item

Future trends, Future Trends Ceramics and glasses contain wide ranging ...

Future Trends Ceramics and glasses contain wide ranging applications in domestic use and even wider application in manufacturing technology. The properties that are related wit

What is a positive displacement pump, A positive displacement pump is a liq...

A positive displacement pump is a liquid or gas to move by trapping a fixed amount of fluid or gas and then forcing (displacing) that trapped volume into the discharge pipe. Positi

Air velocity calculations in aircraft fans, how to calculate Air velocity ,...

how to calculate Air velocity , pressure and power done by aircraft fans

Your job is to design the connecting rod, Introduction You are now worki...

Introduction You are now working as a FEA engineer for a Computer Aided Engineering (CAE) consultancy company called Dantech. This morning, your manager assigned you a new contr

Particle moving in a circle with a constant angular speed, Which of the sta...

Which of the statements are true for a particle moving in a circle with a constant angular speed? Ans)  The angular speed is how fast the angle changes. So  it measures  A particl

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