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

Advantages and limitations of adhesive bonding, Advantages and Limitations ...

Advantages and Limitations of Adhesive Bonding The description so far might be concluded through listing main advantages of adhesive joints. (a) The adhesive joints assist

Automated material handling, Automated Material Handling We have dealt...

Automated Material Handling We have dealt along with the automated guided vehicles and Robots utilized in the industry. Because of the industrial automation, various changes h

Estimate elapsed time and height , Phase 1 Initially ALL Valves A, B, C...

Phase 1 Initially ALL Valves A, B, C, D, E and F are closed.  ALL Tanks A, B, C, D, E are separated and each sealed from the atmosphere. Tank E initially has 2' of air @

Calculations for force, Calculations for force: A square block having...

Calculations for force: A square block having 25cm side and weighing 20N is hinged at point A and rests on rollers at point B as shown in the figure given below. It is pu

Calculate diameter of shaft in maximum direct stress, Calculate diameter of...

Calculate diameter of shaft in maximum direct stress: A shaft is designed for transmitting 100 kW power at 150 rotation per minute. Shaft is supported in bearings 3 m apart a

Viscoelasticity, howto calculate area in hysteresisn..

howto calculate area in hysteresisn..

Steam turbines, The steam that leaves the super-heater is expanded from 130...

The steam that leaves the super-heater is expanded from 130bar at 535°C to 25.2bar at 310°C in a high pressure turbine. The steam from the exit of the HP turbine is reheated to 535

Thermal properties-ceramics-refractory and abrasive material, Thermal Prope...

Thermal Properties Each solid expand on heating and convention on cooling. The thermal expansion of solids is due to basic structure whether atoms occupy mean position on a fi

Physics, when object is placed beyond the center of concave mirror

when object is placed beyond the center of concave mirror

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