Hysol 9396 using Differential Scanning Calorimetry Tim Differential Scanning Calorimetry Study how fullycured Hysol9396 gets after different cure times and with different cure temperatures ID: 788804
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Slide1
First measurements Investigations into the Curing of Hysol 9396 using Differential Scanning Calorimetry
(Tim)
Slide2Differential Scanning Calorimetry
Study how fully-cured Hysol9396 gets after different cure times and with different cure temperatures
Eg
. How well cured is it after 1 day at 22C?
NB.
Hysol received March 2010 !MeasurementsDynamic: Measure heat flow into/out of sample during a temperature ramp (eg 0 to 220C)Measures the maximum possible heat associated with curing exotherm.Static: Measure heat flow into /out of sample at a fixed temperature followed by dynamic scan.Measures heat associated with curing at fixed temperature.By combining both types of measurement the degree of cure for a given process can be determined.
Slide3Dynamic scan from 0 to 220C
Slide4Dynamic Scans
Dynamic Scans
Integrated
Peak (J/g)Melting TempPeak TempCommentWright Report535.1
WL-TR-92-4060: Askins, R; October 1991; pg 35
130412_Hysol_1525.7Un-cured
130416_Hysol_4
564
Un-cured
130429_Hysol_14
584Un-cured - < 10min after mixingWright Report170AL-TR-92-4060: Askins, R; October 1991; pg 35130419_Hysol_7190.763.3104.6After 3 days at 22C130423_Hysol_9179.762.8103.6After 4 days at 22C130424_Hysol_1151.2447.4102.1After 1 day at 22C - very strange!130425_Hysol_12206.557.2103.3After 1 day at 22C)130426_Hysol_13172.860.4102.4After 2 days at 22C
m
elting!
Slide5Isothermal Scans
Isothermal Scans
Temp
HoldIso Heat2nd Onset2nd HeatTot heatComment
Wright Report6675
450.094.0544.0WL-TR-92-4060: Askins, R; October 1991;
pg
35
130412_Hysol_2
66
60378.695.172.0450.6130419_Hysol_86675411.896.698.9510.7130416_Hysol_58260402.4115.269.4471.8130423_Hysol_108260470.0470.0130416_Hysol_69360410.5126.949.3459.8
Slide6Summary
Typical heat released in a dynamic scan of un-cured
Hysol
is 560 ± 25 J/g (5%). This compares reasonably well with the data from the Wright Laboratory report.“CHARACTERIZATION OF EA9396 EPOXY RESIN FOR COMPOSITE REPAIR APPLICATIONS”For room-temperature cured Hysol (1-4 days), the un-released heat is typically 190J/g implying that only 66% of the available heat-release has occurred. (WL-TR-92-4060 quotes 170J/g released after 7 day cure at room temperature)Room-temperature cured sample show indications of melting at about 60CThere is some degree of correlation between curing time and heat release/re-melt temperature.