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

Thermodynamic process - thermodynamics, Thermodynamic process - Thermodynam...

Thermodynamic process - Thermodynamics: Thermodynamic system undergoes changes because of the energy and mass interactions. Thermodynamic state of system changes because of th

What do you mean by extrusion, Q. What do you mean by extrusion? • Ex...

Q. What do you mean by extrusion? • Extrusion is a process used to create objects of a fixed cross-sectional profile. A material is pushed or drawn through a die of the desir

Machien element, assumptions made in deriving a bending formula

assumptions made in deriving a bending formula

Show that quantity is invariant under lorentz transformation, Q. Show that ...

Q. Show that quantity is invariant under Lorentz transformation. Show that the relativistic kinetic energy is given by C2 and it approaches to non relativistic kinetic energy fo

Slidercrank, connecting rod AB of length L support a variable compressiv fo...

connecting rod AB of length L support a variable compressiv force F .Drive an expression for the moment of F about the crank axis O in the term of F L r and angle

Reinforced concrete design, You are tasked with the analysis and design of ...

You are tasked with the analysis and design of the gravity and wind framing system for a 6-story office building. A part plan of the building is attached.  The plan dimensions o

Rough-cut capacity planning, A small producer of specialist vehicles is bui...

A small producer of specialist vehicles is building a new workshop to meet expected demand for its products over a period of 5 years.  The workshop will contain three workcentres,

Show the limitations of rigid bed models, Q. Show the Limitations of Rigid ...

Q. Show the Limitations of Rigid bed models? Due to vertical exaggeration, model slope automatically becomes steeper than in the prototype, this slope exaggeration being the sa

Show pneumatic test, Q. Show Pneumatic Test? Pneumatic testing presents...

Q. Show Pneumatic Test? Pneumatic testing presents hazards that must be addressed as part of the engineering design of the pressure vessel. Due to the additional hazards of

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