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

Governors, What do you mean by sensitivity in a governor?

What do you mean by sensitivity in a governor?

What are design aspects of pelton wheel turbin, Describe with suitable diag...

Describe with suitable diagram the governing of impulse turbines. What are design aspects of Pelton wheel turbine and also explain all the terms. Derive mathematical formula

Define cam operated clamp, Define Cam Operated Clamp 1. The cams operat...

Define Cam Operated Clamp 1. The cams operated clamp find wide application and are fast and positive in action. 2. These should not be used where vibrations are present or w

Classification of steam engine , CLASSIFIC A TIO N: (1 )  In acco...

CLASSIFIC A TIO N: (1 )  In accordance to Cylinder Axis: Engine can be vertical or horizontal. (2 )  In accordance to action of steam: Can be single acting or doub

Simple single machine system, Consider a simple single machine system. It c...

Consider a simple single machine system. It consists of workpieces that enter the system, wait their turn to be processed on a single machine, and then depart the system. The workp

Simply supported beam - bending moment, Simply supported beam -  Bending M...

Simply supported beam -  Bending Moment: Sketch the SFD and BMD for a simply supported beam of 15 m span loaded as illustrated in Figure Figure Solution Tak

Laser beam material processing, LASER BEAM MATERIAL PROCESSING   Lig...

LASER BEAM MATERIAL PROCESSING   Light Amplification of Stimulated Emission of Radiation (LASER) is generated when a lasing medium is excited by a source of energy. Gases li

Shape functions , Derive the shape functions N1...N10 for a 10 node triangu...

Derive the shape functions N1...N10 for a 10 node triangular element in terms of area coordinates L 1 , L 2 , L 3 .  Nodes are equally spaced on the edges and node 10 is at the cen

Combustion chamber or clearance volume, Combustion Chamber ( or Clearance ...

Combustion Chamber ( or Clearance Volume ) : Combustion chamber is a space between the cylinder head and the piston top when the piston is at top dead center (TDC). The combustio

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