Epoxy Putty SRJC Engr 45 Fall 2010 Jinwoo

Overview of the presentation �Introduction �Applications �Variations �Our little Experiment �The End

Introduction �What is Epoxy Putty? -A room-temperature hardening substance used as a spacefilling adhesive

Epoxy �A thermosetting copolymer �Formed from reaction of an epoxide “resin” with polyamine “hardener”

Epoxy �Polymerization process is called “curing” �The time taken for curing depends on the

History of epoxy �The first commercial attempt in 1927 in USA preparing resins from

Applications �Paints and coatings �Adhesives �Industrial Tooling and composites �Electrical systems and electronics

Experiment �Mighty Putty Claims to do these things.

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

Test #4 Tensile Strength �The Tensile Strength Machine gave 16 lb as the maximum

Test #4 Tensile Strength �The Tensile Strength Machine gave 32 lb as the maximum

Tensile Strength Test 16 lb / (7. 6 in x 2. 9 in) =

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

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

Overview of the presentation �Introduction �Applications �Variations �Our little Experiment �The End

Introduction �What is Epoxy Putty? -A room-temperature hardening substance used as a spacefilling 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? ? ? ? ? ?

Quick chemistry recap �Epoxide �Amine

Epoxy �A thermosetting copolymer �Formed from reaction of an epoxide “resin” with polyamine “hardener” �Amine groups react with epoxide groups.

Epoxy �Polymerization process is called “curing” �The time taken for curing depends on the size and shape of epoxy substance, temperature and etc. .

History of epoxy �The 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 Dr. S. O. Greenlee of USA.

Applications �Paints and coatings �Adhesives �Industrial Tooling and composites �Electrical systems and electronics

Variations

Experiment �Mighty 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 Strength �The Tensile Strength Machine gave 16 lb as the maximum load on the Mighty Putty Adhesive.

Test #5 Tensile Strength

Test #4 Tensile Strength �The 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 Pa For JB Steel Weld

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