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

Used engine oil and hot engine parts , Used Engine Oil: Used engine oil ma...

Used Engine Oil: Used engine oil may cause skin disease if repeatedly in contact with the skin for prolonged time. It is advisable to thoroughly wash the hands with soap and water

Example of reduce system to a single force and couple, Example of Reduce sy...

Example of Reduce system to a single force and couple: A system of parallel forces is acting on rigid bar as shown in the figure given below. Reduce this system to  a sing

Describe crank-pin effort, Describe the following terms:- a) Gyroscope ...

Describe the following terms:- a) Gyroscope b) Crank-pin effort c) Piston Effort d) Crank effort e) Thrust on crank shaft bearings.  f) Brake and Dynamometer g

Robotics, Application of group technology point wise

Application of group technology point wise

Introduction to motorcycle repairing , INTRODUCTION: Here, we shall study ...

INTRODUCTION: Here, we shall study about the repairing of motorcycle. Automobile technicians should acquire basic troubleshooting and repairing skills for attending various breakd

Concept of process - thermodynamics, Concept of process - Thermodynamics: ...

Concept of process - Thermodynamics: A process can be defined as change in the state or condition of a substance or working medium. For instance, heating or cooling of thermod

Extent of the hazardous zone, The extent of a hazardous area depends on the...

The extent of a hazardous area depends on the rate of release, ventilation conditions, and fluid properties and is defined by the relevant regional or country standards. The pot

Determine the maximum shear stress, Determine the maximum shear stress: ...

Determine the maximum shear stress: A beam of triangular cross section of base width 120 mm & height 80 mm is subjected to a shear stress force of 3 kN. Determine the maximum

Special commands for cad, Throughout this project, you'll find questions th...

Throughout this project, you'll find questions that will direct you to think about how you're creating the drawing. Although you should not submit the answers to these questions, a

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