ICCAS OpenIR
Structural characteristics and defects in ethyl-cyanoethyl cellulose/acrylic acid cholesteric liquid crystalline system
Wang, LG; Huang, Y
2004-01-27
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume37Issue:2Pages:303-309
AbstractStructural characteristics and optical properties of ethyl-cyanoethyl cellulose [(E-CE)C]/ acrylic acid (AA) cholesteric liquid crystalline solutions and their variations caused by polymerization AA were investigated by UV-vis spectroscopy and wide-angle X-ray scattering (WAXS). With increasing (E-CE)C concentration, both the pitch (P) and the reflection wavelength of the (E-CE)C/AA solutions decreased exponentially but the average intermolecular distance (d) was only slightly decreased. After photopolymerization of the solvent AA, the supramolecular structure and the reflection property of the cholesteric order of the solution were well preserved in the (E-CE)C/poly(acrylic acid) (PAA) composites. However, P, the reflection wavelength, and d were all decreased due to the volume contraction of AA. In the fractured surface of the microtomed composites (parallel to the cholesteric helical axis), a periodic lamellar structure was observed by transmission electron microscopy (TEM). A series of defects (disclinations and dislocations) were also observed and elucidated from the TEM micrographs.
DOI10.1021/ma0344893
Indexed BySCI
Language英语
WOS IDWOS:000188383100012
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82488
Collection中国科学院化学研究所
Corresponding AuthorHuang, Y
Affiliation1.Chinese Acad Sci, Guangzhou Inst Chem, Lab Cellulose & Lignocellulos Chem, Guangzhou 510650, Peoples R China
2.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wang, LG,Huang, Y. Structural characteristics and defects in ethyl-cyanoethyl cellulose/acrylic acid cholesteric liquid crystalline system[J]. MACROMOLECULES,2004,37(2):303-309.
APA Wang, LG,&Huang, Y.(2004).Structural characteristics and defects in ethyl-cyanoethyl cellulose/acrylic acid cholesteric liquid crystalline system.MACROMOLECULES,37(2),303-309.
MLA Wang, LG,et al."Structural characteristics and defects in ethyl-cyanoethyl cellulose/acrylic acid cholesteric liquid crystalline system".MACROMOLECULES 37.2(2004):303-309.
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