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

Company level - safety organization, Company level - Safety Organization ...

Company level - Safety Organization This is at company level and will straight report to the corporate director. He has to always monitor safety policies of the company and b

What is the pressure difference between the stations , (Bernoulli equation ...

(Bernoulli equation along a streamline) Water flows from station (1) to (2) around an expanding corner pipe, 3m high. The speed along the center streamline is 10 m/s at (1) and 5

Illustrate about the term bearing capacity, Illustrate about the term beari...

Illustrate about the term bearing capacity? The bearing capacity of a soil mass frequently termed as the ability of the soil to carry the loads without any failure. The foun

Describe cutting ratio - shear plane and shear angle, a) Define various typ...

a) Define various types of chips and factors responsible for their formation with diagram b) Describe cutting ratio, shear plane and shear angle. c) Sketch Merchant circle di

Calculate density of completely dry oak, The density of a sample of oak is ...

The density of a sample of oak is 0.90 g/cm^3. Calculate             a. the density of completely dry oak             b. the percent water in the original sample

.VIABRATIONS, WHAT IS DAMP VIBRATION FACE ANGLE SIMPLE HARMONIC MOTION NAT...

WHAT IS DAMP VIBRATION FACE ANGLE SIMPLE HARMONIC MOTION NATURAL CIRCULAR FREQUENCY FORCE VIBRATION

Magnitude and direction of force, Magnitude and direction of force: D...

Magnitude and direction of force: Determine magnitude and direction of smallest force P which is required to start the wheel over the block. As shown in the figure. So

What are preheat and interpass temperature, Q. What are Preheat and interpa...

Q. What are Preheat and interpass temperature? Preheat and interpass temperatures shall be in accordance with the applicable codes. Materials that require preheat for welding

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