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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.
Determine the point of contraflexure: Draw the shear force & bending moment diagram for 10 m span overhanging beam along overhanging part of 4 m subjected to a system of loads
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Carbon nanotubes (CNTs) with low weight (density = 1.3 g/ cm^3), high tensile strength (50 GPa), and modulus of elasticity (1 TPa) in the axial direction have been touted as the st
Types Of Polymerisation When some of bifunctional molecules connect in a chain structure, the reaction is termed as addition polymerisation. However, these polymerizations do
Explain Soft or Flexible Automation? This system uses tape, a hand-held control box, microprocessors, programmable logic controllers or computers. The system can be reprogramme
What is an open pair?
Derive the formula for maximum instanteneous stress due to impact loading
Follow board pattern This type of pattern is adopted for those castings where there are some portions which are structurally weak and if not supported properly are likely to br
Aluminium Cast Alloys: Aluminium alloys the cast through any one of the given processes. Sand Casting is the easiest and most versatile process minute castings, complex ca
what are the limitations of group technology and life cyle issues in group technology
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