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Submitted on: 03 September 2009.
Revised on: 11 November 2009.
Accepted on: 23 December 2009.
___________________JOURNAL OF POLYMER ENGINEERING
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Submitted on: 16 April 2005.
Revised on: 17 May 2005.
Accepted on: 09 July 2005.
___________________JOURNAL OF POLYMER ENGINEERING