Morphology and Structure of the 尾 Phase Crystals of Monodisperse Polyfluorenes

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• 作者：Chengfang Liu ; Qilin Wang ; Hongkun Tian ; Jian Liu ; Yanhou Geng ; Donghang Yan
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：April 23, 2013
• 年：2013
• 卷：46
• 期：8
• 页码：3025-3030
• 全文大小：377K
• 年卷期：v.46,no.8(April 23, 2013)
• ISSN：1520-5835

文摘

Lenticular crystals of the 尾 phase of monodisperse poly(9,9-dioctylfluorene)s (PFOs) have been prepared from o-dichlorobenzene (ODCB) solution. The diffraction analysis combined with X-ray and electron diffraction diagrams indicates that PFOs can crystallize in the orthorhombic system which have the lattice parameters of a = 1.32 nm, b = 2.10 nm, and c = 3.36 nm. In these single crystals, the backbone chains are packed parallel to the long axis of crystals. Furthermore, a variation of the annealing temperature from 90 to 130 掳C demonstrates that there exists morphology and structure evolution, which has been systematically investigated by optical microscopy and electron microscopy.