Micromechanical and positron annihilation lifetime study of new cellulose esters with different topological structures
文献类型：期刊论文
| 作者 | Gaydarov, Valentin; Chen, Zhangyan; Zamfirova, Galina; Soylemez, Meshude Akbulut; Zhang, Jinming; Djourelov, Nikolay; Zhang, Jun |
| 刊名 | CARBOHYDRATE POLYMERS
 |
| 出版日期 | 2019-09-01 |
| 卷号 | 219页码:56-62 |
| ISSN号 | 0144-8617 |
| DOI | 10.1016/j.carbpol.2019.05.022 |
| 英文摘要 | Two new groups of cellulose esters with a substituent, either trifluoromethylbenzoate or methylbenzoate, were synthesized in homogeneous conditions. The actual presence of aromatic substituents was demonstrated by H-1-NMR spectra. The mechanical and structural peculiarities were determined by Depth Sensing Indentation (DSI) and Positron Annihilation Lifetime Spectroscopy (PALS) techniques. The relative position of CH3 and CF3 groups on the aromatic substituents influences the molecular packing differently and affects the formation of free volumes. The hardness characteristics and modulus of the corresponding cellulose esters were the lowest when the CH3 and CF3 groups are in m-position on the aromatic substituents. Meanwhile, they exhibited the highest number density of the free volume holes, as revealed by the o-Ps intensity values. An inverse linear relationship between the hardness, respectively on the modulus, and the o-Ps intensity was found. A simplified scheme of the structural feature of the investigated cellulose esters was proposed. |
| 语种 | 英语 |
| WOS记录号 | WOS:000469334500007 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/82621]  |
| 专题 | 中国科学院化学研究所 |
| 作者单位 | Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gaydarov, Valentin,Chen, Zhangyan,Zamfirova, Galina,et al. Micromechanical and positron annihilation lifetime study of new cellulose esters with different topological structures[J]. CARBOHYDRATE POLYMERS,2019,219:56-62. |
| APA | Gaydarov, Valentin.,Chen, Zhangyan.,Zamfirova, Galina.,Soylemez, Meshude Akbulut.,Zhang, Jinming.,...&Zhang, Jun.(2019).Micromechanical and positron annihilation lifetime study of new cellulose esters with different topological structures.CARBOHYDRATE POLYMERS,219,56-62. |
| MLA | Gaydarov, Valentin,et al."Micromechanical and positron annihilation lifetime study of new cellulose esters with different topological structures".CARBOHYDRATE POLYMERS 219(2019):56-62. |
入库方式： OAI收割
来源：化学研究所
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