http://www.digitaljournal.com/article/40689

Cellulose makes plastic much stronger

Posted Oct 19, 2006 by KeithLDick

http://www.sciencedaily.com/upi/index.php?feed=Science&article=UPI-1-20061018-20183500-bc-us-nanocrystals.xml

More interesting stuff..
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"By adding an ounce of crystals to a pound of plastic, you can increase the strength of the plastic by a factor of 3,000,"