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First measurements Investigations into the Curing of First measurements Investigations into the Curing of

First measurements Investigations into the Curing of - PowerPoint Presentation

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First measurements Investigations into the Curing of - PPT Presentation

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

heat hysol temperature cured hysol heat cured temperature dynamic curing days scans 4060 22c day cure room askins october

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Slide1

First measurements Investigations into the Curing of Hysol 9396 using Differential Scanning Calorimetry

(Tim)

Slide2

Differential 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.

Slide3

Dynamic scan from 0 to 220C

Slide4

Dynamic 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!

Slide5

Isothermal 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

Slide6

Summary

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.