SRJC, Engr 45, Fall 2010 Jinwoo Lee Steven Flores Christian Rosko.

SRJC, Engr 45, Fall 2010Jinwoo Lee

Steven FloresChristian Rosko

Overview of the presentationIntroduction

Applications

Variations

Our little Experiment

The End

IntroductionWhat is Epoxy Putty?-A room-temperature hardening substance used as

a space-filling adhesive (Wikipedia)-Made up of a hardener substance and a base

substance-Basically, a set of epoxy liquid in a solid form for

ease of use. -How to use? Just cut, mix like clay and apply !

Then what exactly is epoxy?

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Quick chemistry recapEpoxide

Amine

Epoxy

A thermosetting copolymer

Formed from reaction of an epoxide “resin”

with polyamine “hardener”

Amine groups react with epoxide groups.

EpoxyPolymerization process is called “curing”

The time taken for curing depends on the size

and shape of epoxy substance, temperature

and etc..

History of epoxyThe first commercial attempt in 1927 in USA

preparing resins from epichlorohydrin

Fist synthesis of bisphenol-A-based epoxy

resins by Dr. Pierre Castan of Switzerland and

Dr. S.O. Greenlee of USA.

ApplicationsPaints and coatings

Adhesives

Industrial Tooling and composites

Electrical systems and electronics

Variations

ExperimentMighty Putty Claims to do these things.

Test #1 Leaking Pipe

Failed

Test #2 Leaking Pipe

Failed

Test #3 Leaking Pipe (Copper)

Worked

It seems that Mighty Putty works better on strong metal surface than weak plastic surface.

Test #4 Tensile Strength

Test #4 Tensile StrengthThe Tensile Strength Machine gave 16 lb as

the maximum load on the Mighty Putty Adhesive.

Test #5 Tensile Strength

Test #4 Tensile StrengthThe Tensile Strength Machine gave 32 lb as

the maximum load on the JB Steel Weld Adhesive.

Tensile Strength Test

16 lb / (7.6 in x 2.9 in) = 0.7325 psi = 5050 Pa for Mighty Putty

32 lb / (7.6 in x 2.9 in) = 1.465 psi = 10100 PaFor JB Steel Weld

References

http://www.ehow.com/list_6752835_uses-epoxy-putty.htmlhttp://hubpages.com/hub/Epoxy-Putty-Guidehttp://en.wikipedia.org/wiki/Epoxy#Paints_and_coatings