Facile synthesis of block copolymers by tandem ROMP and eROP from esters precursors.
Facile synthesis of block copolymers by tandem ROMP and eROP from esters precursors.
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DOI：
10.1021/bm500723k
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发表时间：
2014-07
影响因子：
6.2
通讯作者：
Shidong Xiang;Qiuping Zhang;Gang Zhang;Wei Jiang;Yan Wang;Hang Zhou;Quanshun Li;Jun Tang
中科院分区：
文献类型：
--
作者：
Shidong Xiang;Qiuping Zhang;Gang Zhang;Wei Jiang;Yan Wang;Hang Zhou;Quanshun Li;Jun Tang
在本研究中，首先通过串联开环复分解聚合（ROMP）和传统的酶促开环聚合（eROP）从羟基引发剂合成嵌段共聚物。此外，还成功开发了一种新的合成路线，即从酯前体出发的一步eROP来合成目标共聚物。通过 NMR、GPC、DSC 和 MALDI-TOF-MS 分析所制备的聚合物。两种合成路线得到的最终产物的NMR特征峰没有差异。 GPC数据表明，单步eROP获得的共聚物与传统多步合成方法获得的最终产物相似。随后，我们使用模型化合物进行了常规 eROP 和单步 eROP。最后，通过对所得产物的动力学分析和结构分析，阐明了该单步eROP的合理引发机制。
In the present study, block copolymers were first synthesized through a tandem ring-opening metathesis polymerization (ROMP) and conventional enzymatic ring-opening polymerization (eROP) from hydroxyl initiator. Furthermore, a novel synthesis route, single-step eROP from ester precursor was successfully developed to synthesize targeted copolymers. The as-prepared polymers were analyzed by NMR, GPC, DSC, and MALDI-TOF-MS. There was no difference in the characteristic peaks of NMR between the end products obtained from these two synthetic routes. The GPC data showed that the copolymer obtained from single-step eROP was similar to the end product obtained from the traditional multistep synthesis method. Afterward, we used model compounds to carry out the conventional eROP and the single-step eROP. Finally, through the kinetic analysis and structural analysis of the resulting product, a reasonable initiation mechanism for this single-step eROP was elucidated.