Synthesis of Linear Cyclopolymers with 20 and 28-Membered Rings by ATRP

Xiao-fang Pan; Shuai Luo; Ling-zi Fu; Wen-qing Li; Zi-qiang Hu; Guo-qiao Lai

doi:10.11777/j.issn1000-3304.2015.14404

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Synthesis of Linear Cyclopolymers with 20 and 28-Membered Rings by ATRP

Research Article | 更新时间：2021-03-19

- Synthesis of Linear Cyclopolymers with 20 and 28-Membered Rings by ATRP
- Acta Polymerica Sinica Issue 6, Pages: 685-691(2015)
- 作者机构：
  
  1. 杭州师范大学材料与化学化工学院,杭州,310036
  2. 杭州师范大学有机硅实验室,杭州,310036
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2015.14404
  CLC：
- Published：20 June 2015，
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Xiao-fang Pan, Shuai Luo, Ling-zi Fu, Wen-qing Li, Zi-qiang Hu, Guo-qiao Lai. Synthesis of Linear Cyclopolymers with 20 and 28-Membered Rings by ATRP. [J]. Acta Polymerica Sinica (6):685-691(2015)
DOI：

Xiao-fang Pan, Shuai Luo, Ling-zi Fu, Wen-qing Li, Zi-qiang Hu, Guo-qiao Lai. Synthesis of Linear Cyclopolymers with 20 and 28-Membered Rings by ATRP. [J]. Acta Polymerica Sinica (6):685-691(2015) DOI： 10.11777/j.issn1000-3304.2015.14404.

摘要

采用以甲苯为聚合介质的ATRP聚合体系

以双甲基丙烯酸二醇酯为单体

合成了具有二十和二十八元环的线形环化聚合物

聚合物具有窄分子量分布.聚合动力学显示随着链长的增加

环化反应速率变慢.根据聚合物的1H-NMR谱图、由1H-NMR端基分析得到聚合度DPNMR、以及GPC图谱结果

证实获得了线形环化聚合物.TGA测试结果表明2种聚合物的起始分解温度均大于372 ℃

具有比PMMA更好的热稳定性.

Abstract

Linear cyclopolymers with 20- and 28- membered rings were synthesized respectively by ATRP.Cyclopolymerization was carried out using CuBr/PMDETA/EBiB as an initiating system with toluene as solvent

which favored intramolecular cyclization over that with DMSO as solvent.The polymerization kinetics showed that the rate of cyclopolymerization reduced with increasing the ring-size of the polymers.Cyclization efficiency of dialkylsilylene-tethered bismethacrylates is highly affected by the monomer concentration

with the increasing of the concentration of monomer

the cyclization efficiency decreases and PDI of polymer obtained becomes broad.The cyclic structures of the polymer were confirmed by the 1H-NMR spectroscopy and the cyclic degree of the polymers was determined by the end-group analysis of the cyclopolymers and GPC.1H-NMR spectroscopy indicated that the polymerizations proceeded with 95% cyclization for monomer A2 and 92% cyclization for monomer B2.The polymers show controlled molecular weights and narrow molecular weight distributions (Mw/Mn 1.3).The thermodynamic properties of the cyclopolymers was investigated by TGA.The results showed that the cyclopolymers have higher thermal stability (372 ℃) than poly(methyl methacrylate).

关键词

线形环化聚合物ATRP双甲基丙烯酸二醇酯环化聚合

Keywords

Linear cyclopolymerATRPBismethacrylateCyclopolymerization

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Guangzhou Institute of Chemistry, Chinese Academy of Sciences

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