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Comparative structural studies of poly(heptamethylene p,p′-bibenzoate) by X-ray diffraction, positron annihilation and microhardness by Galina Zamfirova; Manya Krasteva; Marijka Misheva; Milena Mihaylova; Ernesto Pérez; José M Pereña is a Materials Science article available to read on EtoBox.
What is Comparative structural studies of poly(heptamethylene p,p′-bibenzoate) by X-ray diffraction, positron annihilation and microhardness about?
## Abstract The structure of quenched samples of a polybibenzoate with a spacer containing seven methylene units has been studied by wide angle X‐ray scattering (WAXS), microhardness (MH) methods and positron annihilation lifetime spectroscopy (PALS). It was established that the quenched samples of poly(heptamethylene __p__,__p__′‐bibenzoate) (P7MB) contain three phases simultaneously: smectic liquid crystalline, amorphous, and a small amount of crystalline one. The __d__‐spacing of the crystal peaks, together with the crystal and smectic domain dimensions in the direction normal to the mesogen planes and the factor of paracrystallinity, were calculated. The average distance between macromolecules determined from the position of the amorphous halo correlates with the open pore diameter obtained by the PALS analysis. On the basis of MH measurements it was considered that the phases are not uniformly distributed in the depth of the sample, so that the smectic phase prevails in the surface layer while the inner layers are partially crystalline. © 2003 Society of Chemical Industry
Who reads Comparative structural studies of poly(heptamethylene p,p′-bibenzoate) by X-ray diffraction, positron annihilation and microhardness?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Galina Zamfirova; Manya Krasteva; Marijka Misheva; Milena Mihaylova; Ernesto Pérez; José M Pereña
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0959-8103)
- Published
- 2003
- Language
- EN
- Field
- Materials Science (Physical Sciences)