Radiation-induced solution copolymerization of acrylonitrile and 4-vinylpyridine
The copolymerization of acrylonitrile (AN) with a hydrophilic monomer is an effective way to prepare hydrophilic polyacrylonitrile (PAN)-based functional materials. In this study, γ-ray radiation-induced copolymerization of AN and 4-vinylpyridine (4-VP) in dimethylsulfoxide (DMSO) was carried out. T...
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Science Press
2022-02-01
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| Series: | Fushe yanjiu yu fushe gongyi xuebao |
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| Online Access: | http://www.fs.sinap.ac.cn/thesisDetails#10.11889/j.1000-3436.2021-0103&lang=zh |
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| author | SUN Rui WANG Yusong JIANG Zhiwen SHU Jingjing WANG Mozhen GE Xuewu |
| author_facet | SUN Rui WANG Yusong JIANG Zhiwen SHU Jingjing WANG Mozhen GE Xuewu |
| author_sort | SUN Rui |
| collection | DOAJ |
| description | The copolymerization of acrylonitrile (AN) with a hydrophilic monomer is an effective way to prepare hydrophilic polyacrylonitrile (PAN)-based functional materials. In this study, γ-ray radiation-induced copolymerization of AN and 4-vinylpyridine (4-VP) in dimethylsulfoxide (DMSO) was carried out. The chemical structure, molecular weight, thermal properties, and hydrophilicity of the synthesized copolymers were characterized. The γ-ray radiation could initiate the copolymerization of AN and 4-VP in DMSO at room temperature (0~35 ℃). The monomer conversion reached above 90% at the absorbed dose of 25 kGy, but the molecular weight of the copolymer depended on the dose rate. When the absorbed dose was 30 kGy, a P(AN-co-4-VP) random copolymer solution with a viscosity of 250 Pa⸱s was obtained directly after the monomer solution was irradiated by γ-rays at a lower dose rate of 11 Gy/min. The P(AN-co-4-VP) copolymer had a weight-average molecular weight of 1.34×105, and the relative content of AN and 4-VP units in the copolymer chains was identical to the feed ratio of AN and the 4-VP comonomer. When the dose rate exceeded 20 Gy/min, molecular weight of the synthesized copolymer decreased remarkably. Thermal properties of the P(AN-co-4-VP) random copolymer with the relative molar ratio of 4-VP to AN of 2% were generally the same as those of the PAN homopolymer. The 4-VP units in the polymer chains did not participate in the ring formation or crosslinking reaction of the side ‒C≡N groups. However, the water contact angle of the P(AN-co-4-VP) random copolymer decreased gradually with increase in 4-VP content, indicating that the introduction of 4-VP units can improve the hydrophilicity of the copolymers. This study provides a new idea for the hydrophilic modification of PAN as well as proves that DMSO solutions with a high mass fraction (>20%) of the homo- or copolymer of AN can be obtained directly via radiation-induced solution polymerization, thus expanding the potential applications of the high-energy radiation technique in the field of solution polymerization of AN. |
| first_indexed | 2024-04-10T08:46:39Z |
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| id | doaj.art-3844efe61ce340e4a815b58cdb776257 |
| institution | Directory Open Access Journal |
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| language | zho |
| last_indexed | 2024-04-10T08:46:39Z |
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| spelling | doaj.art-3844efe61ce340e4a815b58cdb7762572023-02-22T07:23:48ZzhoScience PressFushe yanjiu yu fushe gongyi xuebao1000-34362022-02-01401273810.11889/j.1000-3436.2021-01031000-3436（2022）01-0027-12Radiation-induced solution copolymerization of acrylonitrile and 4-vinylpyridineSUN Rui0WANG Yusong1JIANG Zhiwen2SHU Jingjing3WANG Mozhen4GE Xuewu5CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, ChinaThe copolymerization of acrylonitrile (AN) with a hydrophilic monomer is an effective way to prepare hydrophilic polyacrylonitrile (PAN)-based functional materials. In this study, γ-ray radiation-induced copolymerization of AN and 4-vinylpyridine (4-VP) in dimethylsulfoxide (DMSO) was carried out. The chemical structure, molecular weight, thermal properties, and hydrophilicity of the synthesized copolymers were characterized. The γ-ray radiation could initiate the copolymerization of AN and 4-VP in DMSO at room temperature (0~35 ℃). The monomer conversion reached above 90% at the absorbed dose of 25 kGy, but the molecular weight of the copolymer depended on the dose rate. When the absorbed dose was 30 kGy, a P(AN-co-4-VP) random copolymer solution with a viscosity of 250 Pa⸱s was obtained directly after the monomer solution was irradiated by γ-rays at a lower dose rate of 11 Gy/min. The P(AN-co-4-VP) copolymer had a weight-average molecular weight of 1.34×105, and the relative content of AN and 4-VP units in the copolymer chains was identical to the feed ratio of AN and the 4-VP comonomer. When the dose rate exceeded 20 Gy/min, molecular weight of the synthesized copolymer decreased remarkably. Thermal properties of the P(AN-co-4-VP) random copolymer with the relative molar ratio of 4-VP to AN of 2% were generally the same as those of the PAN homopolymer. The 4-VP units in the polymer chains did not participate in the ring formation or crosslinking reaction of the side ‒C≡N groups. However, the water contact angle of the P(AN-co-4-VP) random copolymer decreased gradually with increase in 4-VP content, indicating that the introduction of 4-VP units can improve the hydrophilicity of the copolymers. This study provides a new idea for the hydrophilic modification of PAN as well as proves that DMSO solutions with a high mass fraction (>20%) of the homo- or copolymer of AN can be obtained directly via radiation-induced solution polymerization, thus expanding the potential applications of the high-energy radiation technique in the field of solution polymerization of AN.http://www.fs.sinap.ac.cn/thesisDetails#10.11889/j.1000-3436.2021-0103&lang=zhradiation-induced solution polymerizationγ-rayacrylonitrile4-vinylpyridinehydrophilic polyacrylonitrile |
| spellingShingle | SUN Rui WANG Yusong JIANG Zhiwen SHU Jingjing WANG Mozhen GE Xuewu Radiation-induced solution copolymerization of acrylonitrile and 4-vinylpyridine Fushe yanjiu yu fushe gongyi xuebao radiation-induced solution polymerization γ-ray acrylonitrile 4-vinylpyridine hydrophilic polyacrylonitrile |
| title | Radiation-induced solution copolymerization of acrylonitrile and 4-vinylpyridine |
| title_full | Radiation-induced solution copolymerization of acrylonitrile and 4-vinylpyridine |
| title_fullStr | Radiation-induced solution copolymerization of acrylonitrile and 4-vinylpyridine |
| title_full_unstemmed | Radiation-induced solution copolymerization of acrylonitrile and 4-vinylpyridine |
| title_short | Radiation-induced solution copolymerization of acrylonitrile and 4-vinylpyridine |
| title_sort | radiation induced solution copolymerization of acrylonitrile and 4 vinylpyridine |
| topic | radiation-induced solution polymerization γ-ray acrylonitrile 4-vinylpyridine hydrophilic polyacrylonitrile |
| url | http://www.fs.sinap.ac.cn/thesisDetails#10.11889/j.1000-3436.2021-0103&lang=zh |
| work_keys_str_mv | AT sunrui radiationinducedsolutioncopolymerizationofacrylonitrileand4vinylpyridine AT wangyusong radiationinducedsolutioncopolymerizationofacrylonitrileand4vinylpyridine AT jiangzhiwen radiationinducedsolutioncopolymerizationofacrylonitrileand4vinylpyridine AT shujingjing radiationinducedsolutioncopolymerizationofacrylonitrileand4vinylpyridine AT wangmozhen radiationinducedsolutioncopolymerizationofacrylonitrileand4vinylpyridine AT gexuewu radiationinducedsolutioncopolymerizationofacrylonitrileand4vinylpyridine |