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| Separation and Characterization of Graft Copolymer from Eucalyptus Calcium Lignosulfonate and Acrylic Acid |
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| DOI：10.11981/j.issn.1000-6842.2013.01.30 |
| Key Words:eucalyptus calcium lignosulfonate; acrylic acid; graft copolymer; separation method; structure characterizations |
| Author Name | Affiliation | | 叶德展 | 四川大学高分子研究所，高分子材料工程国家重点实验室，四川成都,610065 | | 刘 磊 | 四川大学高分子研究所，高分子材料工程国家重点实验室，四川成都,610065 | | 夏 超 | 四川大学高分子研究所，高分子材料工程国家重点实验室，四川成都,610065 | | 代 华 | 四川大学高分子研究所，高分子材料工程国家重点实验室，四川成都,610065 | | 张 熙* | 四川大学高分子研究所，高分子材料工程国家重点实验室，四川成都,610065 |
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| Abstract: |
| Graft copolymerization of eucalyptus calcium lignosulfonate (HLS-Ca) with acrylic acid (AA) was carried out using Fenton regent as a redox initiator. The separation efficiently of traditional precipitation-soxhlet extraction method was investigated, and a new centrifugal separation-combined with soxhlet extraction method was proposed. The chemical structures of HLS-Ca and the graft polymer (HLS-AA) were characterized by FT-IR, UV and 1H-NMR. The results showed that compared with traditional method, the new separation method is more effective to separate the graft polymer from homopolymer and unreacted HLS-Ca. The band at 1727 cm-1 in FT-IR spectrum is assigned to carbonyl absorption; the stronger absorbed band at 210 nm in the UV spectrum can be observed in HLS-AA and the signals between 10 and 14, assigned to the absorption for carboxyl hydrogen, also can be observed in the 1H-NMR spectrum of HLS-AA． |
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