Environmental Engineering Reference
In-Depth Information
TABLE 3.14
Processing.Conditions
Lonzacure.MCDEA.Level,.95%.Stoichiometry.(%)
17.1
Airthane.Temperature.(°C)
80
Lonzacure.Temperature.(°C)
100
Pot.Life.(Min.).-80.°C
4
Mold.Temperature.(°C)
130
Demold.Time.(Min.)
30
Postcure.(Hrs./Temp..°C)
48/130
Selected Elastomer Properties
Hardness(A/D)
92/42
CompressiveStress(Pa)
Modulus.(Pa)..100%.
Elongation
.875*10
4
5%.Delection
254.5*10
4
200%.Elongation
1,485
10%.Delection
419.3*10
4
300%.Elongation
1,870
15%.Delection
578*10
4
Tensile.Strength.(Pa)
3.58*10
4
20%.Delection
.76*10
4
Elongation.(%)
479
25%.Delection
1*10
4
Tear.Resistance.(PLI)
Compressive.Set.(%)
13.8*10
4
Die.C
582
Rebound.(%)
39.3*10
4
Split/Trouser
57/86
NBS.Abrasion.Index
172.4*10
4
of.about.650.Gpa,.whereas.pitch-based.ibers.can.reach.1,000.GPa..Pitch.ibers.
also.are.signiicantly.more.thermally.and.electrically.conductive..The.particular.
grade.of.the.milled.pitch-based.carbon.iber.proposed.for.testing.is.BP/Amoco's.
ThermalGraph.DKD.X..This.material.is.graphitized.at.very.high.temperatures,.
which. increases. thermal. and. electrical. conductivity. and. modulus. of. the. 28.
ibers..Thus,.ThermalGraph.DKD.X,.in.addition.to.increased.heat.conductivity,.
could.improve.mechanical.stiffness.and.strength.of.the.resulting.composite.
3.8.5
Conclusion
We.are.developing.a.technological.process.for.boot.manufacturing..We.select.
pultrusion.speed.process..Polyester.iber.drive.and.impregnate.by.polybuta-
diene,.polyurethane.resin.and.go.through.die.boot.proile..For.testing.space-
men's.(boot.prototype).we.use.four.layers.
3.9
RheologicalBehaviorofFlowResins
3.9.1
Introduction
Rheology. is. the. study. of. the. low. of. materials. that. behave. in. an. interest-
ing.or.unusual.manner,.as.in.deformation.and.low.reinforcement.behavior..
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