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

System of parallel forces - mechanics, System of parallel forces: A r...

System of parallel forces: A rigid body is subjected to system of parallel forces as shown in the figure. Reduce this system to, ( i ) A single force system ( i

Show experimental verification of time dilation, Q. Show Experimental Verif...

Q. Show Experimental Verification of time Dilation ? Time dilation is a real effect, it can be verified by making this experiment. (Are created at high attitudes in the earth a

Hardenability of steel, The hardened layer depth is the measure of harden-a...

The hardened layer depth is the measure of harden-ability. A good harden-ability will sense even thicker sections are uniformly hardened. Conversely a poor harden-ability will gene

Calculated the diameter of an aluninium shaft , Calculated the diameter of ...

Calculated the diameter of an aluninium shaft: Calculated the diameter of an aluninium shaft that is designed to store the similar amount of strain energy per unit volume as a

High speed circuit-carburettor in high speed condition , High Speed Circuit...

High Speed Circuit : The speed of motorcycle is further increased by raising the throttle valve. In this condition, fuel and air enter through main passage and main jet as can be

Cad, c programms fpr cycloidal motion

c programms fpr cycloidal motion

DEVELOP A COMPUTER PROGRAM, Develop a computer program that can be used for...

Develop a computer program that can be used for internal flow analysis in SI units. The program should be able to: ? Get the required input data from the user ? Decide the flow ty

Describe about water disposal system, Q. Describe about Water disposal syst...

Q. Describe about Water disposal system? Disposal water from the Evaporator Package is cooled down to 50°C by the Disposal Cooler and is sent to Disposal Water Tank(s). Disp

THERMODYNAMICS, COMPRESSOR MOSTLY USED FOR SUPERHEATING OF IC ENGINES IS CA...

COMPRESSOR MOSTLY USED FOR SUPERHEATING OF IC ENGINES IS CALLED ----------COMPRESSORS

Generation of steam at constant pressure - thermodynamics, Generation of st...

Generation of steam at constant pressure: Steam is pure substance. Like any other pure substance it can also be converted into any of the three states, that is, solid, liquid

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