Origin of highly recoverable shape memory polyurethanes (SMPUs) with non-planar ring structures: a single molecule force spectroscopy investigation
文献类型：期刊论文
| 作者 | Zhang, Lisheng ; Shams, S. Saqib ; Wei, Yanping ; Liu, Xiaoqing ; Ma, Songqi ; Zhang, Ruoyu ; Zhu, Jin |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
 |
| 出版日期 | 2014 |
| 卷号 | 2期号:47页码:20010 |
| 中文摘要 | In this work, SMPUs with non-planar ring structures in the hard segments display a lowdegree of phase separation but excellent shape recoverability (shape recovery rate similar to 99% with 500% strain). The accepted wisdom is that there are two criteria for SMPUs possessing good shape recoverability: (i) high degree of phase separation forming physical crosslinks; (ii) strong physical interactions between hard segments which keep physical crosslinks stable under external stress. However, our results are completely against the accepted wisdom since the asymmetrical non-planar ring structures will depress the micro-phase separation and physical interactions in the hard phase. Thus, the excellent shape recovery could not be attributed to the phase morphology. Based on such results, single molecule force spectroscopy was adopted to study the properties of single polymer chains with non-planar ring structures. We found that the single chain elasticity was largely improved by non-planar rings. It is highly possible that the excellent shape recovery property originates from the elastic non-planar ring structures absorbing the external stress which stabilizes the physical crosslinks. Much work needs to be done in the near future to confirm this assumption. |
| 公开日期 | 2015-09-20 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/11982]  |
| 专题 | 宁波材料技术与工程研究所_2014专题 |
| 推荐引用方式 GB/T 7714 | Zhang, Lisheng,Shams, S. Saqib,Wei, Yanping,et al. Origin of highly recoverable shape memory polyurethanes (SMPUs) with non-planar ring structures: a single molecule force spectroscopy investigation[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(47):20010. |
| APA | Zhang, Lisheng.,Shams, S. Saqib.,Wei, Yanping.,Liu, Xiaoqing.,Ma, Songqi.,...&Zhu, Jin.(2014).Origin of highly recoverable shape memory polyurethanes (SMPUs) with non-planar ring structures: a single molecule force spectroscopy investigation.JOURNAL OF MATERIALS CHEMISTRY A,2(47),20010. |
| MLA | Zhang, Lisheng,et al."Origin of highly recoverable shape memory polyurethanes (SMPUs) with non-planar ring structures: a single molecule force spectroscopy investigation".JOURNAL OF MATERIALS CHEMISTRY A 2.47(2014):20010. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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