| 原子力显微镜针尖诱导聚氧乙烯熔体结晶的研究 |
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| 引用本文： | 朱敦深,寿兴贤,刘一新,陈尔强,程正迪.原子力显微镜针尖诱导聚氧乙烯熔体结晶的研究[J].高分子学报,2006(4):553-556. |
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| 作者姓名： | 朱敦深 寿兴贤 刘一新 陈尔强 程正迪 |
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| 作者单位： | 1. 北京大学化学与分子工程学院,高分子科学与工程系,高分子化学与物理教育部重点实验室,北京,100871
2. 北京大学化学与分子工程学院,高分子科学与工程系,高分子化学与物理教育部重点实验室,北京,100871;Maurice Morton Institute and Department of Polymer Science,University of Akron,Akron,Ohio 44325-3909,USA |
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| 摘 要： | 原子力显微镜(AFM)是研究高分子结晶行为的一种重要实验手段.在使用AFM原位观察高分子结晶时,为保证能真实地反映结晶过程,一个必须注意的问题是要避免AFM针尖的影响.与此同时,人们考察了在AFM扫描时针尖诱导高分子结晶成核的情况.若使用AFM接触模式(contactmode),扫描时容易造
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| 关 键 词： | 原子力显微镜 聚氧乙烯 针尖诱导结晶 纳米压痕 |
| 收稿时间： | 2006-05-10 |
| 修稿时间： | 2006-05-15 |
AFM-TIP-INDUCED CRYSTALLIZATION OF POLY(ETHYLENE OXIDE) MELT DROPLETS |
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| ZHU Dunshen,SHOU Xingxian,LIU Yixin,CHEN Erqiang,CHENG Stephen Zhengdi.AFM-TIP-INDUCED CRYSTALLIZATION OF POLY(ETHYLENE OXIDE) MELT DROPLETS[J].Acta Polymerica Sinica,2006(4):553-556. |
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| Authors: | ZHU Dunshen SHOU Xingxian LIU Yixin CHEN Erqiang CHENG Stephen Zhengdi |
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| Abstract: | The AFM-tip-induced crystallization of poly(ethylene oxide) (PEO) melt droplets was studied. The melt droplets with the height of 50～100 nm and the lateral size of 2～3 μm were obtained by melting the PEO ultrathin films on the mica surface. For the PEO samples with the number average molecular weights (M_n) ranged from 1.0×10~3 to 1.0×10~4 g/mol,the lateral perturbation from the AFM tip with hard-tapping or nanoscratch mode could not induce the growth of the flat-on lamellae. By contrast,under AFM nanoindentation mode,the tip-induced crystallization occurred when a sufficiently high vertical tip force was applied to the melt droplets of PEO with M_n≥1.0×10~4 g/mol. Moreover,the experimental results indicated that AFM-tip-induced crystallization with nanoindentation method had PEO molecular weight (viscosity) dependence. |
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| Keywords: | Atomic force microscopy Poly(ethylene oxide) Tip-induced crystallization Nanoindentation |
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