Submitted on: 16 March 2009.
Revised on: 18 April 2009.
Accepted on: 26 May 2009.
___________________JOURNAL OF POLYMERS AND THE ENVIRONMENT
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Submitted on: 23 February 2019.
Revised on: 22 June 2019.
Accepted on: 15 July 2019.
___________________JOURNAL OF POLYMERS AND THE ENVIRONMENT
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