Reversible-deactivation anionic alternating ring-opening copolymerization of epoxides and cyclic anhydrides: access to orthogonally functionalizable multiblock aliphatic polyesters†,Chemical Science

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Reversible-deactivation anionic alternating ring-opening copolymerization of epoxides and cyclic anhydrides: access to orthogonally functionalizable multiblock aliphatic polyesters†
Chemical Science ( IF 7.6 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1039/c7sc03643d
Maria J. Sanford _{1,

2,

3,

4,

5} , Nathan J. Van Zee _{1,

2,

3,

4,

5} , Geoffrey W. Coates _{1,

2,

3,

4,

5}

Affiliation

The alternating copolymerization of epoxides and cyclic anhydrides is an increasingly popular route to aliphatic polyesters that are of interest as biodegradable replacements for petroleum-based polymers and for use in the biomedical field. However, broad and bimodal molecular weight distributions in these polymerizations continues to be an issue, limiting synthesis of multiblock copolymers. By use of a bifunctional catalytic system, the reversible-deactivation anionic alternating ring-opening copolymerization of epoxides and cyclic anhydrides gives unimodal polymers with Đ values generally less than 1.07. This allowed for the formation of well-defined triblock copolymers. Additionally, by incorporating both aldehyde and alkene functionalities into the polymer, orthogonal post-polymerization modification was achieved, giving access to well-defined highly modifiable aliphatic polyesters.

中文翻译：

环氧化物和环酐的可逆失活阴离子交替开环共聚：获得可正交官能化的多嵌段脂肪族聚酯的†

环氧化物和环状酸酐的交替共聚是越来越受欢迎的脂族聚酯路线，脂族聚酯作为石油基聚合物的可生物降解替代物并用于生物医学领域而受到关注。但是，在这些聚合反应中，宽峰和双峰分子量分布仍然是一个问题，限制了多嵌段共聚物的合成。通过使用双功能催化体系，环氧化物和环酐的可逆失活阴离子交替开环共聚反应得到的单峰聚合物为Đ值通常小于1.07。这允许形成明确的三嵌段共聚物。另外，通过将醛和烯烃官能团同时引入到聚合物中，实现了正交的后聚合改性，从而获得了定义明确的高度可改性的脂族聚酯。

更新日期：2017-11-15

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