文献类型：期刊文献

中文题名：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(英文)

英文题名：In-situ Observation of the Growth of Fibrous and Dendritic Crystals in Quasi-2-dimensional Poly(ethylene oxide) Ultrathin Films

作者：周圆[1];韩霞[1];刘洪来[1];胡英[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2014

卷号：22

期号：3

起止页码：339

中文期刊名：Chinese Journal of Chemical Engineering

外文期刊名：中国化学工程学报（英文版）

收录：CSTPCD;;EI(收录号：20141317500862);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000333014000013)】；CSCD:【CSCD2013_2014】；

基金：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.

语种：中文

中文关键词：晶体生长过程;纤维状晶体;生长影响;环氧乙烷;超薄膜;树突;原位观察;二维

外文关键词：polymer crystallization, crystal pattern formation, atomic force microscopy, poly（ethylene oxide）

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 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.
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.