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Polymer-Plastics Technology and Engineering Volume 51, 2012 - Issue 7
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Original Articles

Controlling the Transition of Long- and Short-Chain Branching Polypropylene

Wangyang Zhao College of Polymer Science and Engineering, The State Key Laboratory for Polymer Materials Engineering, Sichuan University, Chengdu, China
,
Guoqing Wu College of Polymer Science and Engineering, The State Key Laboratory for Polymer Materials Engineering, Sichuan University, Chengdu, China
&
Qi Yang College of Polymer Science and Engineering, The State Key Laboratory for Polymer Materials Engineering, Sichuan University, Chengdu, ChinaCorrespondence[email protected]
Pages 716-723 | Published online: 02 May 2012
 
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Abstract

To control the length of branched chains on polypropylene under different quantities of monomer and free radical capture agent, trimethylol propane triacrylate (TMPTA) was chosen as monomer, and tetraethylthiuram disulfide (TETDS) was chosen as free radicals capture agent, also known as co-agent. Samples were modified by melting reaction in the presence of DHBP, 2,5-Dimethyl-2,5(tert-butylperoxy) hexane, in an internal mixer. From the results of the experiment, it was concluded that controlling of transition from long-chain branching PP to short-chain branching PP was achieved via the quantity variation of TMPTA and TETDS.

ACKNOWLEDGMENTS

This paper is supported by Program for New Century Excellent Talents in University (contract grant number: NCET-10-0576), International Science & Technology Cooperation Program of China (2010DFA54460), and State Key Laboratory Special Fund.

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