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

Project, project on solid work 2012 The Final Project is to design a mechan...

project on solid work 2012 The Final Project is to design a mechanical assembly in Solidworks. The design must consist of a minimum of 60 parts, 30 of which must be unique. A uniqu

Determining the largest eigenvalue, The Power Method is a classic numerical...

The Power Method is a classic numerical algorithm for determining the largest eigenvalue and eigenvector associated with a matrix A. Write a matlab function that returns the larges

Consider some publications of the bureau of standards, Consider some public...

Consider some publications of the Bureau of Standards. The following publications of the Bureau of Standards shall be read along with this section of footings. a. IS 456 in

Determine the air standard efficiency, Compare the efficiency of Diesel, ot...

Compare the efficiency of Diesel, otto and Dual combustion cycle on the basis of same compression ratio and same heat input. In an otto cycle air at 17 o c and 1 bar is compressed

Constituents of seam welding, Constituents of seam welding The essentia...

Constituents of seam welding The essential elements of a seam welding machine are: Main frame containing welding transformer and tap switch. Welding head consisting o

Benefits of a good layout and design of plant, Q. Benefits of a good layout...

Q. Benefits of a good layout and design? The benefits of a good layout and design cannot be overemphasized. They provide an irreplaceable safety factor throughout the life of t

Shear stress, write the assumption made in derivetion of shear stress produ...

write the assumption made in derivetion of shear stress produced in circular shaft subjected to torsion

Determine the water depth - standard step method, Consider a trapezoidal ch...

Consider a trapezoidal channel with a bottom width of 4 m, side slopes of 3:1 (H:V), and a bottom slope of 0.002 that carries 50 cms. The channel has a Manning's roughness of 0.034

Welding, what is blow hole defect ?

what is blow hole defect ?

What are advantages and limitations of job evaluation, a) Describe producti...

a) Describe productivity. Give comparison of production and productivity. b) Write down characteristics of batch production. c) What are advantages and limitations of job eva

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