Star-Shaped Poly(hydroxybutyrate)s from Bio-based Polyol Cores via Zinc Catalyzed Ring-Opening Polymerization of β-Butyrolactone
Star-Shaped Poly(hydroxybutyrate)s from Bio-based Polyol Cores via Zinc Catalyzed Ring-Opening Polymerization of β-Butyrolactone
复制标题
通过锌催化 β-丁内酯开环聚合从生物基多元醇核中获得星形聚（羟基丁酸酯）
DOI：
10.1016/j.europolymj.2021.110756
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发表时间：
2021
影响因子：
6
通讯作者：
Du, Guodong
中科院分区：
文献类型：
--
作者：
Omar, Rawan;Shaik, Muneer;Griggs, Chloe;Jensen, Jevin D.;Boyd, Robert;Oncel, Nuri;Webster, Dean C.;Du, Guodong
使用多功能引发剂的环酯开环聚合（ROP）是一种有效的方法，可以制备具有明确结构的聚酯。以氨基-恶唑酸锌为催化剂，用ROP法合成了一系列星形聚β-羟基丁酸酯（BBL）。星形结构是通过核心优先的方法构建的，其中几种生物基多功能醇作为ROP的引发剂。具体来说，我们获得了三臂、四臂和多臂星形聚合物，并通过NMR、GPC、TGA和DSC等各种技术对其进行了表征，并证实了星形phb中存在核心结构。改变phb的臂数和臂长可以改变其热性能，在臂长相同的情况下，随着臂数的增加，热稳定性降低。从AFM研究中确定的润湿行为表明，星形PHB的宏观接触角作为臂数的函数最小。
The ring-opening polymerization (ROP) of cyclic esters using multifunctional initiators is an efficient methodology that allows the preparation of polyesters with well-defined architectures. Here a series of star-shaped poly(β-hydroxybutyrates) (PHBs) has been synthesized by ROP ofβ-butyrolactone (BBL) with an amido-oxazolinate zinc catalyst. The star-shaped structure is constructed via a core-first approach, in which several bio-based multifunctional alcohols serve as the initiator for ROP. Specifically, three-, four-, and multi-armed star polymers are obtained and characterized by various techniques including NMR, GPC, TGA, and DSC, and the incorporation of the core structure in the star-shaped PHBs has been confirmed. The thermal properties can be modified by changing the arm number and arm length of PHBs, and the thermal stability decreases as the number of arms increases when they have the same arm lengths. The wetting behavior determined from AFM studies demonstrates a minimum in the macroscopic contact angle as a function of the number of arms of a star-shaped PHB.