DISLOCATION MEDIATED LATTICE BENDING IN 1,6-DI (N-CARBAZOLYL)-2,4 HEXADIYNE (DCHD) POLYDIACETYLENE DROPLETS

被引:17
作者
WILSON, PM
MARTIN, DC
机构
[1] Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan, 48109-2013, H. H. Dow Building
基金
美国国家科学基金会;
关键词
D O I
10.1557/JMR.1992.3150
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Droplets of 1,6-di (N-carbazolyl)-2,4 hexadiyne (DCHD) polydiacetylene were prepared by room temperature evaporation of dilute (0.01 wt. %) solution of the monomer in chloroform onto amorphous carbon-coated mica substrates. High Resolution Electron Microscopy (HREM) and Selected Area Electron Diffraction (SAED) revealed small crystallographically textured droplets (approximately 1 mum diameter) with cracks parallel to the [001] chain direction. The droplet geometry allowed us to investigate the organization of the polymer near surfaces. It was found that the curvature of the droplet edge caused a local bending of the polymer crystal lattice. Direct imaging of the molecular structure near the droplet surface revealed that the mechanism of lattice bending was by the formation of edge dislocations. Dislocations were etched in some droplets to gain information about perturbations in structure and reactivity near the core.
引用
收藏
页码:3150 / 3158
页数:9
相关论文
共 21 条
[1]  
[Anonymous], 1968, THEORY DISLOCATIONS
[2]   POLY[1,6-DI(N-CARBAZOLYL)-2,4-HEXADIYNE] [J].
APGAR, PA ;
YEE, KC .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1978, 34 (MAR) :957-959
[3]  
COURTNERY TH, 1990, MECHANICAL BEHAVIOR
[4]   STRUCTURE, LUMINESCENCE AND POLYMERIZATION OF A DIACETYLENE CRYSTAL - 1,6-DI-(N-CARBAZOLYL)-2,4 HEXADIIN (DCH) [J].
ENKELMANN, V ;
SCHLEIER, G ;
WEGNER, G ;
EICHELE, H ;
SCHWOERER, M .
CHEMICAL PHYSICS LETTERS, 1977, 52 (02) :314-319
[5]   REACTIVITY OF STRAINED CONFIGURATIONS IN SOLID-STATE POLYMERIZATION REACTIONS [J].
GERASIMOV, GN .
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1990, 187 :215-222
[6]   RAMAN-SPECTROSCOPIC EVIDENCE FOR A SURFACE PHASE ON AS-POLYMERIZED SINGLE-CRYSTALS OF THE POLYDIACETYLENE FROM THD [J].
HANKIN, SH ;
SANDMAN, DJ .
MACROMOLECULES, 1991, 24 (17) :4983-4984
[7]   THE EFFECT OF SURFACE CONSTRAINTS ON THE ORDERING OF BLOCK COPOLYMER DOMAINS [J].
HENKEE, CS ;
THOMAS, EL ;
FETTERS, LJ .
JOURNAL OF MATERIALS SCIENCE, 1988, 23 (05) :1685-1694
[8]  
HONE D, 1992, B AM PHYS SOC, V37, P355
[9]  
HONE D, 1992, COMMUNICATION MAR
[10]   SINGLE ORIENTATION IN POLY(DIACETYLENE) FILMS FOR NONLINEAR OPTICS - MOLECULAR EPITAXY OF 1,6-BIS(9-CARBAZOLYL)-2,4-HEXADIYNE ON ORGANIC-CRYSTALS [J].
LEMOIGNE, J ;
KAJZAR, F ;
THIERRY, A .
MACROMOLECULES, 1991, 24 (09) :2622-2628