Rubber elasticity. June 15, 1981-June 14, 1981. [Polydimethylsiloxane] Page: 4 of 10
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The proposal entitled "Rubber Elasticity," submitted to the Department of
Energy in August, 1980, and funded for the period from June 15, 1981 to June 14,
1982, described two projects to be conducted during a two year period. The
first of these is an experimental study of the swelling of elastomers by
diluents, and the second concerns theoretical analysis of the dynamics and
thermodynamics of random networks.
New experimental results obtained during the first six months of the
contract have an impact on our understanding of rubber elasticity that is just
beginning to be felt. Approximations that have stood in this field for nearly
40 years are now discarded, and we are forced to reach for a new understanding
of the behavior of elastomers.
Theoretical work on amorphous systems has thus far centered on evaluation
of the density of states for models (constructed by others) of amorphous silicon,
AS2O2, etc. We are currently assessing the utility of these models: although
they have been used by solid state physicists to calculate properties of
amorphous media, they suffer from the decided difficulty that there is no way
to generate atatistical averages from them.
A third project, not included in the original proposal, has also been
conducted on this contract. We are synthesizing elastomers with metal-chelate
crosslinkages. These materials will be useful in applications, and they
promise to provide a host of new insights into the details of the physics of
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Eichinger, B.E. Rubber elasticity. June 15, 1981-June 14, 1981. [Polydimethylsiloxane], report, January 1, 1981; United States. (digital.library.unt.edu/ark:/67531/metadc1093902/m1/4/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.