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

Relation between intensity bending moment and shear force, Relation between...

Relation between intensity bending moment and shear force: What is the relation between load intensity bending moment and shear force Consider the beam subjected to any t

Find a relationship chart , A manufacturing facility consists of five depar...

A manufacturing facility consists of five departments, 1, 2, 3, 4 and 5. It produces four components having the manufacturing product routings and production volumes indicated in t

Describe that energy is a point function, (a) Describe that Energy is a poi...

(a) Describe that Energy is a point function and a property of the system. (b) What is the essence of 1 st law of thermodynamics ? Write down expression for the first law appli

Determine the dead load - sewer construction, Determine the dead load: ...

Determine the dead load: A 250 mm diameter sewer is placed in a 2.75 m deep rectangular trench that is 0.65 m wide. This trench is backfilled with saturated clay having a unit

Usage of special tool, USAGE OF SPECIAL TOOL: The common tools used in rep...

USAGE OF SPECIAL TOOL: The common tools used in repair and maintenance of motorcycles were introduced to you in previous sections. Now, we shall learn about some special tools and

Kleins construction, Kleins construction fr 90 degree and 180 degree angle

Kleins construction fr 90 degree and 180 degree angle

Steam hot service insluation thicknesses, Q. Steam Hot Service Insluation T...

Q. Steam Hot Service Insluation Thicknesses? Steam Hot Service Insluation Thicknesses are specified based on the following design criteria: Average Annual Climatic Condi

Materials weldability, MATERIALS WELDABILITY Electron beam welding has ...

MATERIALS WELDABILITY Electron beam welding has the ability to weld a variety of materials including dissimilar combinations. These can be split into general categories as to t

Disadvantages of two stroke engine, Disadvantages of two stroke engine: ...

Disadvantages of two stroke engine: The following are some of the disadvantages of two stroke engine when compared with four stroke engine: 1. As firing takes place in ever

Compute the diameter of a solid shaft, Compute the diameter of a solid shaf...

Compute the diameter of a solid shaft: Compute the diameter of a solid shaft transmitting 150 kW at 25 rpm, if the maximum shear stress in the shaft is not to exceed 70 MPa. C

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