Helical twist senses, liquid crystalline behavior, crystal microtwins, and rotation twins in a polyester containing main-chain molecular asymmetry and effects of the number of methylene units in the backbones on the phase structures and morphologies of its homologues

Macromolecules

Volumn 35, Issue 26, 2002, Pages 9678-9686

  Weng, Xin ^a   Li, Christopher Y ^a,c   Jin, Shi ^a   Zhang, Dong ^a   Zhang, John Z ^a   Bai, Feng ^a   Harris, Frank W ^a   Cheng, Stephen Z D ^a   Lotz, Bernard ^b  

^a The University of Akron   (United States)

^b INSTITUT CHARLES SADRON   (France)

^c Drexel University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ATOMIC FORCE MICROSCOPY; CRYSTALLIZATION; DIFFERENTIAL SCANNING CALORIMETRY; GRAIN BOUNDARIES; MOLECULAR STRUCTURE; MORPHOLOGY; PHASE COMPOSITION; POLYESTERS; TEMPERATURE; TRANSMISSION ELECTRON MICROSCOPY; TWINNING; X RAY DIFFRACTION ANALYSIS;

CRYSTAL MICROTWINS; HELICAL TWIST SENSES; MOLECULAR ASYMMETRY; SELECTED AREA ELECTRON DIFFRACTION;

LIQUID CRYSTAL POLYMERS;

EID: 0037126748     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma0214106     Document Type: Article

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55. For PET(R*-9), we have reported that the crystal structure is orthorhombic if we consider the rest of the ED spots belonging to a commensurate superstructure. However, if we consider these diffractions to be attributed to the basic crystal structure, it is also possible to assign a monoclinic unit cell with a microtwinning, although this polymer possesses less precisely determined diffraction positions and intensities.
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