Facile Synthesis of Block Copolymers by Tandem ROMP and eROP from Esters Precursors

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• 作者：Shidong Xiang ; Qiuping Zhang ; Gang Zhang ; Wei Jiang ; Yan Wang ; Hang Zhou ; Quanshun Li ; Jun Tang
• 刊名：Biomacromolecules
• 出版年：2014
• 出版时间：August 11, 2014
• 年：2014
• 卷：15
• 期：8
• 页码：3112-3118
• 全文大小：430K
• ISSN：1526-4602

文摘

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.