The Polymer Cinema
Teflon Dynamics- Have not viewed this yet.
Poly(isobutylene) (Center for Scientific Computing- Finland)
Reptation Dynamics and Star Polymer Dynamics (Leeds)
Hele-Shaw (Boston U.- Eshel Ben-Jacob)-
This image, created as part of the Dance of Chance exhibit, was created by
filling a
1/80 inch space between to plastic plates with glycerol and then injecting
air into the
space. Food coloring is used to elucidate the ``fingering'' pattern produced.
A morph of micrographs that show polyoxymethylene molded at room temperature, 80 C and 120 C
The pictures that were morphed are optical micrographs of microtom
cuttings that were taken out of tensile test bars. It is shown how the
thickness of the skin and
the transition zone are effected by the mold temperature. At 20 C mold
temperature the skin is relative thick (blue
transparent zone ca.: 25 =B5m), at 80 C the skin is quite thin
(green/yellow
transparent zone ca.: 9.1 =B5m) and at a mold
temperature of 120 C no skin is visible. The transition zone exhibits the
same trend. A thickness of 254, 196 and 11 =B5m
for the mold temperatures 20, 80 and 120 C respectively can be measured.
Responsible for the formation of a skin on the
bars is the cooling process. The more rapidly the mould is cooled down the
less time rests for the material to crystalize and form
superstructures such as spherulites.
More information available on the morphology of POM and its tribology.
Last Update- September 4, 1995- wld