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## Engineering

 Civil Engineering Chemical Engineering Electrical & Electronics Mechanical Engineering Computer Engineering Engineering Mathematics MATLAB Other Engineering Digital Electronics Biochemical & Biotechnology

A)  Draw the expected DSC graph for a semicrystalline polymer heated from 25-300°C at 5°C/min with the following properties:

• % crystallinty of initial sample = 25%

• Heat capacity of the polymer generally decreases between room temperature and Tg

• Tg = 120°C

• There is a small amount of enthalpic recovery

• The sample’s heat capacity is constant above Tg

• Cold crystallization occurs between 140-150°C and adds 25% crystallinity to the sample

• The sample melts between 200-220°C

• The sample begins to degrade via an exothermic reaction at 270°C

• The heat of crystallization of a perfect crystal of this polymer is 100 J/g

For your answer, you should draw a graph and label the axes with appropriate quantities and units (the X axis should be temperature).  Draw the expected response and use arrows and/or other annotation to illustrate the various features.  Include as much detail as possible.

Chemical Engineering, Engineering

• Category:- Chemical Engineering
• Reference No.:- M91893

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