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http://reply.papertrans.cn/2/146/14597/14597-32.png
Submitted on: 18 July 2008.
Revised on: 11 November 2008.
Accepted on: 06 January 2009.
___________________IRANIAN POLYMER JOURNAL---SPRINGER
Submitted on: 28 December 2009.
Revised on: 30 March 2010.
Accepted on: 24 May 2010.
___________________IRANIAN POLYMER JOURNAL---SPRINGER
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Submitted on: 02 June 2003.
Revised on: 28 August 2003.
Accepted on: 21 September 2003.
___________________IRANIAN POLYMER JOURNAL---SPRINGER