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

Thermodynamics, show that energy is property of system

show that energy is property of system

Determines the effect of price reduction, Determines the effect of price re...

Determines the effect of price reduction: In order to enhance the sales, management of Quality ice-cream company decided to give discounts in the sale of one and half liter pa

Theory of machines, procedure to draw velocity and acceleration diagram usi...

procedure to draw velocity and acceleration diagram using relative velocity method

Limitations of resistance welding, Limitations of resistance welding ...

Limitations of resistance welding 1). Pressure - tight joints are achieved only with flash butt welding. Resistance welding is not recommended for high pressure joints a

Determine the percentage increase in power possible, An open belt connects ...

An open belt connects two flat pulleys. The pulley diameters are 300 mm and 450 mm and the corresponding angles of Cap are 160 o and 210 o . The smaller pulley runs at 200 r.p.

Solution problems, hello I do not currently have my money. it turns out tha...

hello I do not currently have my money. it turns out that you will not extend your hand to me.

Explain about unit pipe racks, Q. Explain about Unit pipe racks? Unit p...

Q. Explain about Unit pipe racks? Unit pipe racks are the main arteries carrying the pipes and cables into the units, and as such should be centrally located. They are usually

What is pedestal and what are uses of pedestal, What is pedestal? What are ...

What is pedestal? What are uses of pedestal? PEDESTALS A pedestal is used to transfer the loads from the metal columns through the floor and soil to the footing when it is a

What is full-scale loading for load cell, A load cell based on a simply-sup...

A load cell based on a simply-supported beam with rectangular cross-section is shown below. The beam is made using a tool steel alloy with E = 200 GPa, ν = 0.285. Two strain gages

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