利用双功能<italic style="font-style: italic">β</italic>-二亚胺锌催化剂正交构建丙交酯-苯乙烯嵌段共聚物

张瑶瑶; 杨贯文; 伍广朋

doi:10.11777/j.issn1000-3304.2020.20255

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利用双功能β-二亚胺锌催化剂正交构建丙交酯-苯乙烯嵌段共聚物

研究论文 | 更新时间：2021-05-07

- 利用双功能β-二亚胺锌催化剂正交构建丙交酯-苯乙烯嵌段共聚物
  增强出版
- Construction of Polylactide-block-Polystyrene Copolymer by Orthogonal ROP and O-ATRP via Bifunctional β-Diiminate Zinc Catalyst
- 高分子学报 2021年52卷第5期页码：467-476
- 作者机构：
  
  教育部高分子合成与功能构造重点实验室浙江省新型吸附分离材料与应用技术重点实验室浙江大学高分子科学与工程学系　杭州 310027
- 作者简介：
  
  E-mail: gpwu@zju.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 21674090)、钱江人才计划-D(项目号 QJD1702025)和中央高校基础研究经费(项目号 2018QNA4056)资助项目()
- DOI：10.11777/j.issn1000-3304.2020.20255
  中图分类号：
- 纸质出版日期：2021-5-3，
  
  网络出版日期：2021-1-19，
  
  收稿日期：2020-11-27，
  
  修回日期：2020-12-22，
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张瑶瑶, 杨贯文, 伍广朋. 利用双功能β-二亚胺锌催化剂正交构建丙交酯-苯乙烯嵌段共聚物[J]. 高分子学报, 2021,52(5):467-476.

Yao-yao Zhang, Guan-wen Yang, Guang-peng Wu. Construction of Polylactide-block-Polystyrene Copolymer by Orthogonal ROP and O-ATRP via Bifunctional β-Diiminate Zinc Catalyst[J]. Acta Polymerica Sinica, 2021,52(5):467-476.
张瑶瑶, 杨贯文, 伍广朋. 利用双功能β-二亚胺锌催化剂正交构建丙交酯-苯乙烯嵌段共聚物[J]. 高分子学报, 2021,52(5):467-476. DOI： 10.11777/j.issn1000-3304.2020.20255.

Yao-yao Zhang, Guan-wen Yang, Guang-peng Wu. Construction of Polylactide-block-Polystyrene Copolymer by Orthogonal ROP and O-ATRP via Bifunctional β-Diiminate Zinc Catalyst[J]. Acta Polymerica Sinica, 2021,52(5):467-476. DOI： 10.11777/j.issn1000-3304.2020.20255.

摘要

设计合成了一种双功能的

-二亚胺锌((BDI)Zn)催化剂，其具有2-溴异丁酸酯引发基团，该基团结合了引发内酯的开环聚合(ROP)和乙烯基单体的原子转移自由基聚合(ATRP)的能力. 此催化剂由单晶X射线衍射和核磁表征确定其化学结构. 利用这种催化剂可以实现一锅一步法构建极性聚烯烃/聚酯嵌段共聚物，即在光照射下通过

-二亚胺锌((BDI)Zn)催化剂以正交聚合路径来同时实现乙烯基自由基聚合和环内酯开环2种嵌段相的构筑，从而提供了一种有效的途径来制备聚酯/极性聚烯烃嵌段共聚物. 利用此法可构建多种聚酯/极性聚烯烃嵌段共聚物，包括聚苯乙烯-嵌段-聚丙交酯(PS-

-PLA)、聚甲基丙烯酸甲酯-嵌段-聚丙交酯 (PMMA-

-PLA)，以及聚苯乙烯-嵌段-聚己内酯(PS-

-PCL). 且这些嵌段共聚物具有可控的分子量和组成，凝胶渗透色谱(GPC)显示单峰和窄分子量分布(

1.5). 此双功能催化剂及对应合成策略为极性聚烯烃/聚酯等嵌段共聚物提供了一种简便的构建方案.

Abstract

In this work

we report an orthogonal preparation of polyvinyl-block-polyester copolymers in a one-pot and single step strategy

via

a well-defined

-diiminate zinc ((BDI)Zn) catalyst under light irradiation. The zinc compound is specially designed to possess 2-bromoisobutyrate initiating group

which combines the capabilities of ring-opening polymerization (ROP) of lactones and atom transfer radical polymerization (ATRP) of vinyl monomers. Under light

simultaneous chain propagations

via

a coordinated insertion of cyclic esters from Zn-oxygen bond and organocatalyzed-ATRP of vinyl monomers from the

-bromoisobutyrate take place simultaneously

thus providing an extremely efficient route to block copolymers composed of polyester and polyvinyl in single step. The structure of the catalyst is established by single-crystal X-ray diffraction

H- and

C-NMR. A wide range of polyvinyl-block-polyester copolymers including polystyrene-block-polylactide (PS-

-PLA)

poly(methyl methacrylate)-

-PLA (PMMA-

-PLA) and PS-

-polycaprolactone (PS-

-PCL) with controlled molecular weight and compositions are efficiently constructed. These block copolymers display monomodal and moderate molecular weight distributions (

1.5)

and are fully characterized by DSC

H-NMR

and

C-NMR spectroscopy. The catalyst and synthetic strategy mentioned above offer an extremely convenient catalytic access to polyvinyl/polyester block copolymers for the formation of attractive nanomaterials.

关键词

嵌段共聚物正交聚合一锅法光控反应β-二亚胺锌

Keywords

Block copolymerOrthogonal polymerizationOne-potLight irradiationβ-Diiminate zinc

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Construction of Polylactide-block-Polystyrene Copolymer by Orthogonal ROP and O-ATRP via Bifunctional β-Diiminate Zinc Catalyst

DOI：10.11777/j.issn1000-3304.2020.20255

摘要

Abstract

关键词

Keywords

references