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)

【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. 【作者单位】： Key
【关键词】： polymer crystallization crystal pattern formation atomic force microscopy poly(ethylene oxide)
【基金】：Supported by the National Natural Science Foundation of China(21176065,21136004) the 111 Project(B08021) the Fundamental Research Funds for the central Universities of China
【分类号】：TQ320.721
【正文快照】： 1 INTRODUCTIonPoly(ethylene oxide)(PEO)has a simple chain structure with a low melting temperature,which makes it an ideal model for studying the morphology of semicrystalline polymers.The morphological beha-vior of PEO has been extensively studied and i

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