Citation: De-Yong Xia, Qi-Min Jiang, Wen-Yan Huang, Hong-Jun Yang, Xiao-Qiang Xue, Li Jiang, Bi-Biao Jiang. Polymerization Mechanism of Methyl Methacrylate Initiated by Ethyl Acetate/t-BuP₄[J]. Chinese Journal of Polymer Science, ;2019, 37(6): 598-603. doi: 10.1007/s10118-019-2228-x shu

Polymerization Mechanism of Methyl Methacrylate Initiated by Ethyl Acetate/t-BuP₄

a.
Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China
b.
Changzhou University Huaide College, Jingjiang 214500, China

Corresponding author: Bi-Biao Jiang, jiangbibiao@cczu.edu.cn
Received Date: 11 December 2018
Revised Date: 8 January 2019
Available Online: 26 February 2019

The anionic polymerization of methyl methacrylate (MMA) was carried out using phosphazene base t-BuP₄ and ethyl acetate (EA) as the catalyst and the initiator, respectively. Gas chromatography (GC), size exclusion chromatography (SEC) measurements, and nuclear magnetic resonance (NMR) analyses were used to reveal the polymerization mechanism and to confirm the polymer structure. The results confirmed the proposed polymerization mechanism and the polymer structure, while the initiator efficiency was low. Meanwhile, the initiation by methoxy anion coming from hydrolysis of the ester bond in MMA was also observed. As a result, there is a marked deviation between the theoretical molecular weight and the measured molecular weight, and it is essential to carry out the polymerization at excessive dosage of t-BuP₄ for preparing polymers with narrow molecular weight distribution.
- Phosphazene base (t-BuP₄),
- Methyl methacrylate,
- Ethyl acetate,
- Anionic polymerization
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Polymerization Mechanism of Methyl Methacrylate Initiated by Ethyl Acetate/t-BuP4

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通讯作者: 陈斌, bchen63@163.com

Polymerization Mechanism of Methyl Methacrylate Initiated by Ethyl Acetate/t-BuP₄