Thermoplastic Cellulose-graft-poly(L-lactide) Copolymers Homogeneously Synthesized in an Ionic Liquid with 4-Dimethylaminopyridine Catalyst
文献类型：期刊论文
| 作者 | Yan, Chenghu; Zhang, Jinming; Lv, Yuxia; Yu, Jian; Wu, Jin; Zhang, Jun; He, Jiasong |
| 刊名 | BIOMACROMOLECULES
 |
| 出版日期 | 2009-08-01 |
| 卷号 | 10期号:8页码:2013-2018 |
| ISSN号 | 1525-7797 |
| DOI | 10.1021/bm900447u |
| 英文摘要 | An effective method for grafting L-lactide (LA) from unmodified cellulose by ring-opening polymerization (ROP) in homogeneous mild conditions is presented. By Using 4-dimethylaminopyridine (DMAP) as ail organic catalyst, cellulose-graft-poly(L-lactide) (cellulose-g-PLLA) copolymers with a molar substitution (MS(PLLA)) Of PLLA in a range of 0.99-12.28 were successfully synthesized in ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl) at 80 degrees C. The amount and length of grafted PLLA in cellulose-g-PLLA copolymers were controlled by adjusting the molar ratios of LA monomer to cellulose. The structure and thermal properties of cellulose-g-PLLA copolymers were characterized by [(1)H] NMR, (13)C NMR, wide-angle X-ray powder diffraction (WAXD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and optical microscopy. The DSC results revealed that the copolymers exhibited a single glass transition temperature. T(g), which sharply decreased with the increase of MS(PLLA) up to MS(PLLA) = 8.28 (DS(PLLA) = 2.19) and increased a little with a further increase of the lactyl content. When MS(PLLA) was above 4.40, the graft copolymers exhibited thermoplastic behavior, indicating the intermolecular and intramolecular hydrogen bonds in cellulose molecules had been effectively destroyed. By using a conventional thermal processing method, fibers and disks of cellulose-g-PLLA copolymers were prepared. |
| 语种 | 英语 |
| WOS记录号 | WOS:000268661400001 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/67279]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wu, Jin |
| 作者单位 | Chinese Acad Sci, Joint Lab Polymer Sci & Mat, KLEP, BNLMS, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Chenghu,Zhang, Jinming,Lv, Yuxia,et al. Thermoplastic Cellulose-graft-poly(L-lactide) Copolymers Homogeneously Synthesized in an Ionic Liquid with 4-Dimethylaminopyridine Catalyst[J]. BIOMACROMOLECULES,2009,10(8):2013-2018. |
| APA | Yan, Chenghu.,Zhang, Jinming.,Lv, Yuxia.,Yu, Jian.,Wu, Jin.,...&He, Jiasong.(2009).Thermoplastic Cellulose-graft-poly(L-lactide) Copolymers Homogeneously Synthesized in an Ionic Liquid with 4-Dimethylaminopyridine Catalyst.BIOMACROMOLECULES,10(8),2013-2018. |
| MLA | Yan, Chenghu,et al."Thermoplastic Cellulose-graft-poly(L-lactide) Copolymers Homogeneously Synthesized in an Ionic Liquid with 4-Dimethylaminopyridine Catalyst".BIOMACROMOLECULES 10.8(2009):2013-2018. |
入库方式： OAI收割
来源：化学研究所
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