srjc, engr 45, fall 2010 jinwoo lee steven flores christian rosko
TRANSCRIPT
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