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

Determine the thermal conductivity of the rod, One end of a rod, 35 mm in d...

One end of a rod, 35 mm in diameter, is diped into a furnace with the other end projecting in the outer air. After the steady state is obtained, the temperature of the rod is evalu

GOVERNORS, Explain Wilson HArtnell Governor

Explain Wilson HArtnell Governor

Brass is an alloy of which materials, Brass is an alloy of (A) Copper ...

Brass is an alloy of (A) Copper and zinc.  (B) Copper and iron. (C) copper and Aluminium.  (D) Copper and tin. Ans: Brass is an alloy of copper and zin

ENGINEERNING DRAWNING, HOW TO PREPARE A DRAWING IN FIRST ANGLE PROJECTION A...

HOW TO PREPARE A DRAWING IN FIRST ANGLE PROJECTION AND THIRD ANGLE PROJECTION AND WHAT IS THEIR BASIC PRINCIPLE AND WE DO NOT MAKE DRAWING IN 2ND ANGLE PROJECTION AND 4TH ANGLE PRO

Economic order quantity, Economic Order Quantity: Assume an economic o...

Economic Order Quantity: Assume an economic order quantity case where annual demand D = 500 units, economic order quantity Q = 100 units, the wanted probability of not stockin

Total tension in cable of the elevator, Total tension in cable of the eleva...

Total tension in cable of the elevator: An elevator having weight 5000N is ascending with an acceleration of 3m/sec 2 . During this ascent its operator which is having weig

Advantages of casting process, Advantages of Casting Process: Electri...

Advantages of Casting Process: Electric Furnace : The melting of steel by electric furnaces developed rapidly for the availability of cheap electric power. Electricity is us

Methods of analysis of trusses, Methods of analysis of trusses: What ...

Methods of analysis of trusses: What are the methods of analysis of trusses? What is found when the analysis of a system is done? Sol.:  The forces in the members of

Electron beam welding(ebw)-basic principle, BASIC PRINCIPLE OF ELECTRON BEA...

BASIC PRINCIPLE OF ELECTRON BEAM WELDING(EBW)   Electron beam welding which utilises a heat source of electrons which are accelerated by an electric field to mextremely high

Projection of solids., draw the projection of pentagonal pyramid have 30 mm...

draw the projection of pentagonal pyramid have 30 mm edge and axis 50 mm long having base on hp and an edge of the box parallel to vp

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