Lab 6 - 1 Differential Scanning Calorimeter and...

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1 Differential Scanning Calorimeter and Thermogravimetric Analyzer Techniques Laura Hughey Georgia Institute of Technology
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2 ABSTRACT
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3 In Part I of the lab, a differential scanning calorimeter (DSC) was used to determine the behavior of polypropylene by having it undergo heating and cooling cycles. The DSC measured the differences in heat energy supplied and then plotted them. The graph showed the melting temperature and crystallization temperature for polypropylene. In Part II of the lab, a thermogravimetric analyzer (TGA) was used to determine the point of mass degradation of a given sample of polypropylene. The TGA used a scale and a heating source to record and plot data for the change in weight of a sample with respect to temperature. The temperature in which the mass degradation occurred gives an idea of the types of impurities present in the sample. MATERIALS AND EQUIPEMENT Part I – DSC DSC Q200 V24.2 Build 107 (TA Instruments, Inc.) Polypropylene Aluminum pans Lid for pans Balance Part II – TGA TGA Q5000 V3.6 Build 253 (TA Instruments, Inc.) Polypropylene Platinum pan Balance EXPERIMENTAL PROCEDURE Part I
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4 A sample of polypropylene (PP) was weighed (8.48 mg) and then placed into an aluminum pan and capped using a clamp. The sample was then put into the DSC machine along
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Lab 6 - 1 Differential Scanning Calorimeter and...

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