Enhanced Spin Capturing Polymerization of Ethylene

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• 作者：Cedric Dommanget ; Christophe Boisson ; Bernadette Charleux ; Franck D鈥橝gosto ; Vincent Monteil ; Fernande Boisson ; Thomas Junkers ; Christopher Barner-Kowollik ; Yohann Guillaneuf ; Didier Gigmes
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：January 8, 2013
• 年：2013
• 卷：46
• 期：1
• 页码：29-36
• 全文大小：384K
• 年卷期：v.46,no.1(January 8, 2013)
• ISSN：1520-5835

文摘

Enhanced spin capturing polymerization (ESCP)鈥攁 recent and versatile technique in the field of controlled radical polymerization鈥攁chieves control over molecular weights and the synthesis of complex copolymer structures for a wide range of monomers. In the present work, the use of ESCP was extended to the radical polymerization of ethylene under mild conditions (low temperature and medium ethylene pressure) using a nitrone as spin trapping agent. It was demonstrated that the evolution of polyethylene (PE) molecular weight can be accurately described by classical ESCP kinetic equations. A PE bearing a midchain alkoxyamine function was thus obtained with high selectivity (90%). A more complex structure was produced from the radical polymerization of ethylene in the presence of a midchain alkoxyamine-functionalized polystyrene (PS) synthesized by ESCP in the form of ABA triblock copolymer (where A is polystyrene and B polyethylene).