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

Estimate the tempreture measured by thermocouples, An experiment to determi...

An experiment to determine the convection coefficient associated with airflow over the surface of a thick stainless steel casting involves insertion of thermocouples in the casting

Mechanisms, two different method to convert from rotational motion to linia...

two different method to convert from rotational motion to liniar motion

What is metal jacketing, Q. What is Metal Jacketing? a) Metal jacketing...

Q. What is Metal Jacketing? a) Metal jacketing shall be Alcan T-3000-H14 series, T-1100-H14 or approved equivalent stucco embossed aluminum with a factory applied moisture barr

Staff holon, Figure: Structure and Relationship among the Basic Holons of...

Figure: Structure and Relationship among the Basic Holons of a Holonic Manufacturing System   Staff Holon The function of staff holon is to support other holons along

Coated electrodes and their classifications, COATED ELECTRODES AND THEIR CL...

COATED ELECTRODES AND THEIR CLASSIFICATIONS Welding technology has changed tremendously over the past decades. Its application is found in all sectors of industries, smaller or l

Principle stresses, Determine the bending  (o-, ) and shear stress ( Tx), )...

Determine the bending  (o-, ) and shear stress ( Tx), ) at the surface element shown on the solid circular shaft below. Use Mohr's circle to determine the principle stresses, a l

MATERIAL SCIENCE, IF ONE SOLID PHASE SPLITS INTO TWO SOLID PHASES ON HEATIN...

IF ONE SOLID PHASE SPLITS INTO TWO SOLID PHASES ON HEATING THE REACTION IS CALLED

Determine the tension in the cord, Determine the tension in the cord: ...

Determine the tension in the cord: Two blocks containing the weights and positions illustrated in Figure rest on a frame which rotates around its vertical axis at a constant s

What is the use of spindle in radial drilling machine, What is the use of S...

What is the use of Spindle in Radial drilling machine    The spindle holds the drill or cutting tools and revolves in a fixed position in a sleeve.

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