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

Cam-basic components of engine , Cam: This is an integral part of camshaf...

Cam: This is an integral part of camshaft. A cam is designed in such a way as to open or close the valves at the correct timing and keep them open for the necessary duration.

Quasi static process - thermodynamics, Quasi static process - thermodynamic...

Quasi static process - thermodynamics: Thermodynamic equilibrium of a system is very difficult to be realized during the occurrence of a thermodynamic process. 'Quasi-static'

New rule with local one step ahead prediction: wls rule, New Rule with Loca...

New Rule with Local One Step Ahead Prediction: WLS Rule Along with an observation to improve the performance measure of the system, a dynamic posteriori rule, the WLS that is

How the drawbacks of WFM technique have been overcome, The drawbacks of WFM...

The drawbacks of WFM technique have been overcome Domain While no representation can describe all possible solids, a representation should be able to represent a useful se

Determine magnitude of greatest shear stress, At a point in a rectangular b...

At a point in a rectangular block of elastic material under strain, there is a tensile stress of 50MPa on one plane and a compressive stress of 30 MPa on a plane at right angles. T

Design ia-32 instructions, 1.  Given the data below, design IA-32 instructi...

1.  Given the data below, design IA-32 instructions to copy data in array X to array Y.   .data X   sdword   10,30,40,-10,-20,-4,-50 Y   sdword   7 dup (?)    2.  Given

Airport layout - planning a new airport, Airport Layout: The main com...

Airport Layout: The main components of an airport are: (a)        Runways (b)       Taxiways (c)        Apron (d)       Terminal area (i)        Terminal build

Compute the concentration of li, Aluminum-lithium alloys have been develope...

Aluminum-lithium alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. A commercial aircraft skin material having a

Can you illustrate sea coal, Q. Can you illustrate Sea Coal? Sea coal o...

Q. Can you illustrate Sea Coal? Sea coal or coal dust is finely ground soft coal (pulverized coal). It is added to moulding sand used to make ferrous castings. It tends to obta

Capp for forming processes, CAPP for Forming Processes Sheet metal par...

CAPP for Forming Processes Sheet metal parts are produced from flat sheets on presses using special metal forming dies. Process planning for sheet metal parts involves complex

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