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

Welding, Why is the quality of welds produced by submerged arc welding very...

Why is the quality of welds produced by submerged arc welding very good#Minimum 100 words accepted#

What do you mean by turret nozzle, Q. What do you mean by turret Nozzle? ...

Q. What do you mean by turret Nozzle? Turret Nozzle - Turret nozzles are large nozzles that can deliver large quantities of water quickly. They are used on very large fires whe

Illustrate wood and silica flour, Q. Illustrate Wood and Silica Flour? ...

Q. Illustrate Wood and Silica Flour? Wood Flour : It is ground wood particles or other cellulose materials such as grain hulls. They serve the same purpose as cereals except t

Alignment of a railway line - railways, Alignment of a Railway Line: ...

Alignment of a Railway Line: Selection of Alignment The following points must be considered in selecting the alignment of a railway line : (a) It should be as direct

Explain the information phase screw conveyor with auger, Information phase ...

Information phase of screw conveyor with auger: Steps: To secure all and complete information and gather facts and from best sources.Our project is selected based on the cu

Force on rigid body - non rigid body, Force on Rigid body - Non Rigid body:...

Force on Rigid body - Non Rigid body: As Rigid body cannot change its shape on application of any force, It will begin moving in the direction of applied force without any

Find out the velocity of the chain, Find out the velocity of the chain: ...

Find out the velocity of the chain: Figure shows a metal chain ABC where portion BC is of length 0.4 metres and is hanging vertically, & portion AB of length 0.8 metres rests

Show the types of changes in project, Q. Show the types of Changes in proje...

Q. Show the types of Changes in project? During the development and execution of a project, the following changes can occur:  Scope of work changes  Cost deviation

Evaluate the total deformation of the bar, (a) A member ABC is formed by co...

(a) A member ABC is formed by connecting a steel bar of 20mm diameter to an aluminium bar of 30 mm diameter, and is subjected to forces as shown in figure. Evaluate the total defor

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