Question

Isothermal differential scanning calorimetry (DSC) tests were performed
on three unsaturated polyester (UPE) samples at three different temperatures
(100C, 110C, and 120C). The output for the three DSC
tests is presented in the Fig. 4.30. On the graph, label which curve is
associated with which test temperature. From the curves in Fig. 4.30 estimate
the total heat of reaction, QT.

1600 cal/(min mg) 1200 1000 800 600 400 Figure 4.30 Isothermal DSC measurements of UPE 200 8 samples (Courtesy of Gen- Corp Research, Akron, OH) 10 12 14 min 18 time,

Answer 1

2 0 C ed Cur ve coMespon da Curve urre en Cur ve BLue the time he gui'ned fon and hefencnee beinf he ason hyher tenperature sanple least ha undes th Jotal heat otr neae tion Curre Cal A H Cal Curres Anea undu al Blue Ce take Lets oil thhe heat e ame becans iu Aame Cast No xes x thca of each Heat ot e action box) A H 3 boxes t tu ! (o0-200) 2. a o y 2 Cs

3 x 0.5 tI No e 2 5 boxes 2yn nea ot ea ch he 2 0 0 Ca ya mij Cal 2-5X 400 Ca To tal eat o heacion cal 4 Note of boxes no taken appa kinmate