Robust and Operationally Simple Synthesis of Poly(bis(2,2,2-trifluoroethoxy) phosphazene) with Controlled Molecular Weight, Low PDI, and High Conversion

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• 作者：Joachim H. G. Steinke ; Barnaby W. Greenland ; Stephen Johns ; Matthew P. Parker ; Robert C. J. Atkinson ; Ian A. Cade ; Peter Golding ; Stephen J. Trussell
• 刊名：ACS Macro Letters
• 出版年：2014
• 出版时间：June 17, 2014
• 年：2014
• 卷：3
• 期：6
• 页码：548-551
• 全文大小：229K
• 年卷期：v.3,no.6(June 17, 2014)
• ISSN：2161-1653

文摘

Synthetically straightforward conditions have been developed for the preparation of poly(bis 2,2,2-trifluoroethoxy)phosphazene with low PDI (<1.15) at high conversion (75鈥?9%) and on a multigram scale. A combination of ³¹P NMR and GPC analyses demonstrate that molecular weight increases linearly as a function of monomer consumption, exhibiting first order kinetics with respect to monomer concentration up to high monomer conversion. Thus, the molecular weight can be controlled by varying the initiator (Hb>2b>O) to monomer ratio.