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

Draw the bending moment and shear force diagram, Draw the bending moment an...

Draw the bending moment and shear force diagram for the following cases : a) A cantilever beam of length (L) carrying a Point load (W)at its free end. b) A simply supported b

Centrifugal air compressor, Centrifugal air compressor: A centrifugal...

Centrifugal air compressor: A centrifugal air compressor delivers 15Kg of air per minute. The outlet and inlet conditions are At inlet: Velocity = 5m/sec, enthalpy = 5KJ

Operation research, what are the significance and scope of operations resea...

what are the significance and scope of operations research

Feeler gauge-measuring tools , Feeler Gauge: It is used to measure minor c...

Feeler Gauge: It is used to measure minor clearances. Feeler gauges come in set of a few blades of different thickness as shown in Figure. It is used to measure the spark plug gap

Computer aided synthesis, The basic aim of synthesis in design process is t...

The basic aim of synthesis in design process is to provide information which can tell you how to improve the design. In general the synthesis process gives many alternatives of

Couple, a couple can be balanced by a force equal to its magnitude?

a couple can be balanced by a force equal to its magnitude?

Magnitude, Magnitude, direction and position of resultant force: Q : ...

Magnitude, direction and position of resultant force: Q : A horizontal line PQRS is 12 m long, and PQ = QR = RS = 4m. Forces of 1000, 1500, 1000 and 500 N act at P ,

Stress distribution in beams, Stress Distribution in Beams: 1. learn t...

Stress Distribution in Beams: 1. learn the section modulus of beams of several cross section. 2. found the normal force for partial beam section & its moment around the neu

(APPLIED THERMODYNAMICS, AA steam power plant operates on a reheat Rankine ...

AA steam power plant operates on a reheat Rankine cycle. Steam enters the high-pressure turbine at a pressure of 12.5 MPa and temperature of 550 oC at a rate of 15 kg/s. It leaves

Determine the force and stress, The space truss is supported by a ball-and-...

The space truss is supported by a ball-and-socket joint at D and short links at C and E. Determine the force and stress in each member and state if the members are buckle or

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