Ring-Opening (ROP) versus Ring-Expansion (REP) Polymerization of 蔚-Caprolactone To Give Linear or Cyclic Polycaprolactones
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- 作者：Jos茅 A. Castro-Osma ; Carlos Alonso-Moreno ; Joaqu铆n C. Garc铆a-Martinez ; Juan Fern谩ndez-Baeza ; Luis F. S谩nchez-Barba ; Agust铆n Lara-S谩nchez ; Antonio Otero
- 刊名：Macromolecules
- 出版年：2013
- 出版时间：August 27, 2013
- 年：2013
- 卷：46
- 期：16
- 页码：6388-6394
- 全文大小：382K
- 年卷期：v.46,no.16(August 27, 2013)
- ISSN：1520-5835
文摘
Macromolecular engineering of cyclic polycaprolactones has been carried out by a ring-expansion procedure catalyzed by a series of alkyl-organoaluminum initiators. The single-site nature of the initiators allows a very well-controlled macrolactonization process to give moderate to high molecular weight cyclic polymers with narrow polydispersities. Cyclic architectures are supported by a combination of techniques such as viscosity measurements, NMR, and MALDI-TOF MS analysis.