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Journal
2008 | 6 | 4 | 575-580
Article title

Study of multiblock polyamide-6/Poly-(isoprene) copolymers by positron annihilation spectroscopy

Content
Title variants
Languages of publication
EN
Abstracts
EN
Positron annihilation lifetime spectroscopy (PALS) has been used to determine the free volume in multiblock polyamide-6/poly-(isoprene) copolymers (PA-6/PI), synthesized via activated anionic bulk copolymerization. The diisocyanate functionalized telechelic PI, blocked with caprolactam (CL) has been used as a commoner and an activator at the same time. The elastic PI block incorporated into the main chain of PA-6 affects the amorphous and crystal phase of the copolymer leading to changing in degree of crystallinity. The positron annihilation lifetime spectroscopy (PAL) and Doppler broadening of annihilation line (DBAL) technique in a set of pure PA-6 and PA-6/PI copolymers with two different compositions have been applied and evaluation of the size of free-volume holes (pores), localized mainly in the disordered regions of the PA-6/PI copolymer by measuring the o-Ps lifetime (τ3) and o-Ps intensity (I3) has been performed. [...]
Publisher

Journal
Year
Volume
6
Issue
4
Pages
575-580
Physical description
Dates
published
1 - 12 - 2008
online
28 - 10 - 2008
Contributors
author
  • Department of Polymer Engineering, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria, rbryaskova@uctm.edu
author
  • Department of Polymer Engineering, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria
author
  • Institute of Nuclear Research and Nuclear Energy, 1784, Sofia, Bulgaria
author
  • Faculty of Physics, Sofia University, 1126, Sofia, Bulgaria
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11532-008-0073-9
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