Shape memory effect of ethylene-vinyl acetate copolymers
文献类型：期刊论文
| 作者 | Li, FK; Zhu, W; Zhang, X; Zhao, CT; Xu, M |
| 刊名 | JOURNAL OF APPLIED POLYMER SCIENCE
 |
| 出版日期 | 1999-02-14 |
| 卷号 | 71期号:7页码:1063-1070 |
| 关键词 | Ethylene-vinyl Acetate (Eva) Copolymers Crosslinking Shape Memory Effect |
| ISSN号 | 0021-8995 |
| 英文摘要 | Crosslinked ethylene-vinyl acetate (EVA) copolymers with VA content of 28% by weight were prepared by a two-step method by evenly dispersing the crosslinking agent (dicumyl peroxide) into the EVA matrix and then crosslinking at elevated temperatures. The crosslinking features of the samples were analyzed by Soxhlet extraction with xylene and dynamic mechanical measurements. All the samples were crystalline at room temperature, and the chemical crosslinks seemed to have little effect on the melting behavior of polyethylene segment crystals in the EVA copolymers. The shape recovery results indicated that only those specimens that had a sufficiently high crosslinking degree (gel content higher than about 30%) were able to show the typical shape memory effect, a large recoverable strain, and a high final recovery rate. The degree of crosslinking can be influenced by the amount of the peroxide and the time and temperature of the reaction. The response temperature of the recovery effect (about 61 degrees C) was related to the melting point of the samples. The EVA shape memory polymer was characterized by its low recovery speed that resulted from the wide melting range of the polyethylene segment crystals. (C) 1999 John Wiley & Sons, Inc. |
| 语种 | 英语 |
| WOS记录号 | WOS:000077715000004 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/75401]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Xu, M |
| 作者单位 | Chinese Acad Sci, Inst Chem, Polymer Phys Lab, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, FK,Zhu, W,Zhang, X,et al. Shape memory effect of ethylene-vinyl acetate copolymers[J]. JOURNAL OF APPLIED POLYMER SCIENCE,1999,71(7):1063-1070. |
| APA | Li, FK,Zhu, W,Zhang, X,Zhao, CT,&Xu, M.(1999).Shape memory effect of ethylene-vinyl acetate copolymers.JOURNAL OF APPLIED POLYMER SCIENCE,71(7),1063-1070. |
| MLA | Li, FK,et al."Shape memory effect of ethylene-vinyl acetate copolymers".JOURNAL OF APPLIED POLYMER SCIENCE 71.7(1999):1063-1070. |
入库方式： OAI收割
来源：化学研究所
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