Crystalline morphology of a thermotropic aromatic polyester crystallized from nematic melt

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	Crystalline morphology of a thermotropic aromatic polyester crystallized from nematic melt
	Ho, ZM; Chen, SX; Jin, YZ; Qian, RY
刊名	MACROMOLECULAR RAPID COMMUNICATIONS
	2000-05-12
卷号	21 期号:7 页码:358-361
ISSN号	1022-1336
英文摘要	The crystalline morphology of a thermotropic aromatic polyester crystallized from st nematic melt was investigated by means of polarized optical microscopy (POM) and scanning electron microscopy (SEM). Due to POM measurements it was found that spherulites of two different types are formed within the two different temperature regions. When T-c was exceeding 170 degrees C, spherulites of type-1 showing a negative birefringence grew with a radial fibrillar morphology and exhibited a clear Maltese-cross pattern. The radius growth rate of type-2 spherulites was about 2.2 mu m/min at 185 degrees C. When T-c was smaller than 160 degrees C, spherulites of type-2 were formed and exhibited a radially outward growing structure hut no evident Maltese-cross pattern. These spherulites could be seen by the naked eyes due to their size reaching several millimeters. SEM observations revealed that the spherulites of type-1 exhibited a ripple-like homocentric morphology with periodical compact fibrils having a diameter of about 150 nm perpendicular to the radial direction, fn contrast, the spherulites of type-2 exhibited, as apparent from performed SEM images, radially growing crystallites of about 500 nm in size with no periodicity in the radial direction.
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000087142700005
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/76003]
专题	中国科学院化学研究所
通讯作者	Chen, SX
作者单位	Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Polymer Phys Lab, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Ho, ZM,Chen, SX,Jin, YZ,et al. Crystalline morphology of a thermotropic aromatic polyester crystallized from nematic melt[J]. MACROMOLECULAR RAPID COMMUNICATIONS,2000,21(7):358-361.
APA	Ho, ZM,Chen, SX,Jin, YZ,&Qian, RY.(2000).Crystalline morphology of a thermotropic aromatic polyester crystallized from nematic melt.MACROMOLECULAR RAPID COMMUNICATIONS,21(7),358-361.
MLA	Ho, ZM,et al."Crystalline morphology of a thermotropic aromatic polyester crystallized from nematic melt".MACROMOLECULAR RAPID COMMUNICATIONS 21.7(2000):358-361.