Not by eye. It would be interesting to put some samples in a
spectrophotometer and see what turns up. There might be a unique signature to each batch.
The distribution of isoprene chain lengths might be distinctive. Dispersion
of a light beam might give some indication. I don't know that it is
necessary, since the physical properties of interest are easy to measure.
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Received on Sun Mar 04 2007 - 18:52:20 CET