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Chinese Journal of Materials Research  2017, Vol. 31 Issue (4): 314-320    DOI: 10.11901/1005.3093.2016.417
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Synthesis and Property of Proton Exchange Membrane Based on Tadpole-type POSS Block Copolymer
Jie ZHANG1,2(), Fang CHEN3, Xiaoyan MA3
1 School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities Duyun 558000, China
2 Department of Applied Statistics and Science, Xijing University, Xi'an 710123, China
3 School of Natural and Applied Science, Northwestern Polytechnical University, Xi'an 710129, China
Cite this article: 

Jie ZHANG, Fang CHEN, Xiaoyan MA. Synthesis and Property of Proton Exchange Membrane Based on Tadpole-type POSS Block Copolymer. Chinese Journal of Materials Research, 2017, 31(4): 314-320.

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Abstract  

Tadpoles-type POSS block copolymer with polystyrene block copolymer and polymethyl methacrylate as arms (PMMA-b-PS) was synthesized by atom transfer radical polymerization (ATRP) method with polysilsesquioxane (POSS) as the initiator and polystyrene block copolymer and polymethyl methacrylate as raw material, and then was characterized by means of FTIR, 1H NMR and GPC. The results show that the tadpoles-type POSS block copolymer was synthesized successfully. Proton exchange membrane based on the tadpoles-type POSS type block copolymer was prepared, of which the ion exchange capacity, water uptake and swelling rate, proton conductivity and thermal performance was as sessed . The results show that proton exchange membrane based on the tadpole-type POSS block copolymer has higher proton conductivity at high temperature as well as high initial decomposition temperature and high temperature resistant performance.

Key words:  organic polymer materials      PEM      ATRP      tadpole shaped block copolymer      POSS     
Received:  20 July 2016     
ZTFLH:  O631.1+1  
Fund: Supported by Fund Project of shaanxi Provincial Department of Education (No.16JK2240);2016 High-level Scientific Research Foundation for the Introduction of Talent for Qiannan Normal University for Nationalities (No.qnsyrc201615);Base of Production, Education & Research of Functional Polymer Materials for Qiannan Normal University for Nationalities (No.Qnsyk201604);College Students Innovation and Entrepreneurship Training Program for Xijing University (No.127152016148)

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https://www.cjmr.org/EN/10.11901/1005.3093.2016.417     OR     https://www.cjmr.org/EN/Y2017/V31/I4/314

Fig.1  Synthesis of tadpole-shaped POSS block copolymer via ATRP
Fig.2  FTRP of tadpole-shaped POSS block copolymer
Fig.3  1H NMR of tadpole-shaped POSS block copolymer
Fig.4  GPC of tadpole-shaped POSS block copolymer
Samples Feed ratio(MMA:St) Mn PDI Block ratio(PMMA:PS)
POSS-PMMA-b-PSa 1:1 61267 1.54 317:273(1:0.86)
POSS-PMMA-b-PSb 1:2 94576 1.53 348:564(1:1.62)
POSS-PMMA-b-PSc 1:3 136333 1.59 382:932(1:2.44)
Table 1  Molecular weight and block ratio of tadpole-shaped POSS block copolymer
Samples Ionic exchange
capacity(meqg-1)
POSS-PMMA317-b-SPS273 4.24
POSS-PMMA348-b-SPS564 5.63
POSS-PMMA382-b-SPS932 7.42
Table 2  IEC of tadpole-shaped POSS block copolymer PEM
Fig.5  Water uptake of PEM under different temperature
Fig.6  λ of PEM under different temperature
Fig.7  Swelling ratio of PEM on the thin
Fig.8  Proton conduction of PEM under different temperature
Fig.9  Relation between proton conduction and λ
Fig.10  Proton transfer mechanism of PEM POSS-PMMA-b-SPS8
Fig.11  TGA curveof tadpole-shaped POSS block copolymer
Samples Initial decomposition
temperature / ℃
Quality retention
at 600℃ / %
POSS-PMMA317-b-PS273 213.9 4.9
POSS-PMMA348-b-PS564 232.7 7.3
POSS-PMMA382-b-PS932 277.9 13.1
Table 3  Thermal properties of tadpole-shaped POSS block copolymer
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