| 准二维聚(环氧乙烷)超薄薄膜中线状和树枝状结晶生长的在线观察简 |
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| 引用本文： | 周圆,韩霞,刘洪来,胡英.准二维聚(环氧乙烷)超薄薄膜中线状和树枝状结晶生长的在线观察简[J].中国化学工程学报,2014,22(3):339-345. |
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| 作者姓名： | 周圆 韩霞 刘洪来 胡英 |
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| 作者单位： | Key Laboratory for Advanced Materials and Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China |
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| 基金项目： | Supported by the National-Natural Science Foundation of China （21176065, 21136004）, the 111 Project （B08021） and the Fundamental Research Funds for the central Universities of China. |
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| 摘 要： | Crystal growth processes of poly（ethylene oxide） were followed from the original nucleation sites by using atomic force microscopy. Two distinct quasi-2-dimensional crystals about 4 nm thick were obtained from as-spun polymer ultrathin films： fibrous crystals, generated by the sheafing field via spin-coating, coexist with con- ventional dendrites. The growth of the two structures is dominated by diffusion limited aggregation, though the growth rate of the fibrous crystals is around one order of magnitude faster than that of the dendrites. The fibrous crystals are more stable than the dendritic ones.
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| 关 键 词： | polymer crystallization crystal pattern formation atomic force microscopy poly(ethylene oxide) |
| 收稿时间： | 2012-11-18 |
In-situ Observation of the Growth of Fibrous and Dendritic Crystals in Quasi-2-dimensional Poly（ethylene oxide） Ultrathin Films |
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| ZHOU Yuan,HAN Xia,LIU Honglai and HU Ying.In-situ Observation of the Growth of Fibrous and Dendritic Crystals in Quasi-2-dimensional Poly（ethylene oxide） Ultrathin Films[J].Chinese Journal of Chemical Engineering,2014,22(3):339-345. |
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| Authors: | ZHOU Yuan HAN Xia LIU Honglai and HU Ying |
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| Affiliation: | Key Laboratory for Advanced Materials and Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: | Crystal growth processes of poly(ethylene oxide) were followed from the original nucleation sites by using atomic force microscopy. Two distinct quasi-2-dimensional crystals about 4 nm thick were obtained from as-spun polymer ultrathin films: fibrous crystals, generated by the shearing field via spin-coating, coexist with conventional dendrites. The growth of the two structures is dominated by diffusion limited aggregation, though the growth rate of the fibrous crystals is around one order of magnitude faster than that of the dendrites. The fibrous crystals are more stable than the dendritic ones. |
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| Keywords: | polymer crystallization crystal pattern formation atomic force microscopy poly（ethylene oxide） |
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