Shape Memory Polymer and Its Applications Kelly Kirsch. SMART MATERIALS SHAPING TOMORROW’S WORLD. ERG Meeting, May 28, 2009. Hello, Texas! We are glad to be here!. Who is LGT?.
SMART MATERIALS SHAPING TOMORROW’S WORLD
ERG Meeting, May 28, 2009
We are part of the Dayton RegionEntrepreneurial Signature Program!
*To this date we have received almost $200,000 in funding to help develop our Shape Memory Elastomer Technology.
*Fully equipped Polymer Lab located at Dayton Entreprenuer Center
Shape Memory Polymer Structure
SMPs exist in a glassy state at lower temperatures
Deformation frozen in the glassy state after cooling under load
COOL < Tg
HEAT > Tg
SMPs exist in a rubbery state at higher temperaturesx
Recover due to the elasticity of rubbery state
Because the glassy modulus is at least two orders of magnitude higher than that of the rubbery modulus, the stored elastic stress is not large enough to drive the reverse deformation in the glassy state as the load is removed.
(pressed at higher
temperature and cold
down to room temperature)
The thickness of SMP was pressed from 5 mm to 1 mm.
(after heated to higher
Only 5.8% of increase in dimension when temperature is lower than shape transition temperatures.
The dimension abruptly increases and expanded to 132.8% when the temperature is increased above 130C.
150% compressed SMP
Heating rate: 2C/min
Self energetic isolation
Expansion with a certain temperature
in any media – gas, oil or water
Self Energetic Isolation
- thermally activated SMPs
Water Swellable SMP
Advantages of materials:swellable SMPs
Compared to swellable
Oil Swellable SMP
The typical SEM images of the pressed F-SMP and recovered F-SMP
The addition of conductive fillers including metallized and nano-scale fillers but not limited, such as, conductive exfoliated graphite (EX-GR), carbon nanotube
(CNT) or nanofiber (CNF), etc will form a conductive network in SMP when the
amounts of the fillers exceed their percolation threshold.
Electrical conducctive shape memory nanocomposites
can be actuated by the passage of electric current to the temperature above the shape yransition temperature because the carbon nanofibers' network forms electrically conductive pathways throughout the nanocomposite.
for you time!