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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.
Laser-induced breakdown spectroscopy (LIBS) is a type of spectroscopy that uses plasma generated by a laser pulse. A schematic of a LIBS system is shown in the figure. The laser is
can you explain about merchant circle,cutting forces
Upward Compatibilityof IGES Upward Compatibility : The need for generations of processors to parse files compliant with earlier versions of IGES thwarted the breadth and rate o
It is estimated that the average number of surface defects in 20 square meter of paper produced by process is 3.what is probability of finding number more than 2 defects in 40 squa
By operation of the distillation columns you are often interested to maintain output despite fluctuations in the composition, ex. feed composition and feed flow. One possible actua
Q. Use of Stainless Steels in welding? Considerable care must be exercised to obtain sound, crack-free welds. These difficulties are pronounced when welding very high-chromium
1. An extraction column (sketched below with the known process data) is used to remove acid from an oil stream by contacting it with pure water. It can be assumed that the oil and
Maintenance of Railway Line Importance of Maintenance The need for maintenance of railway lines arises out of the following considerations : (a) The track rests on
how to calculate the volume of HFO burn to produice steam?
Calculated the diameter of an aluninium shaft: Calculated the diameter of an aluninium shaft that is designed to store the similar amount of strain energy per unit volume as a
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