The anisotropy of poly(acrylic acid) in composites with liquid crystallinecellulose derivatives as seen by low-frequency Raman spectroscopy

Authors
Kozanecki, M Duval, E Ulanski, J Okrasa, L Saviot, L
Citation
M. Kozanecki et al., The anisotropy of poly(acrylic acid) in composites with liquid crystallinecellulose derivatives as seen by low-frequency Raman spectroscopy, POLYMER, 41(2), 2000, pp. 751-755
Citations number
21
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMER
ISSN journal
00323861 → ACNP
Volume
41
Issue
2
Year of publication
2000
Pages
751 - 755
Database
ISI
SICI code
0032-3861(200001)41:2<751:TAOPAI>2.0.ZU;2-E
Abstract
The low-frequency Raman scattering (LFRS) was used in order to determine th e orientation of poly(acrylic acid) in anisotropy composite with liquid cry stalline [(propionyloxy)propyl]cellulose (PPC). The photopolymerisation of acrylic acid in the presence of PPC leads to the formation of the poly(acry lic acid) (pAA) anisotropic network. This anisotropy is stable even at temp eratures higher than the temperature of the optical isotropisation of the P PC/pAA composite. The comparison of the LFRS and thermooptical data proves the hypothesis explaining of the reversibility of the optical birefringence in the PPC/pAA composites by formation, in a course of photopolymerisation of anisotropic pAA network. (C) 1999 Elsevier Science Ltd. All rights rese rved.