Strong orientation correlation and optical anisotropy in blend of cellulose ester and poly(ethylene 2,6-naphthalate) oligomer

ABSTRACT Molecular orientation of two aromatic additives in cellulose acetate propionate (CAP) matrix was investigated from orientation birefringence data and an intermolecular orientation correlation represented by nematic interaction (NI) was evaluated. Poly(ethylene terephthalate) (PET) and poly(...

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Bibliographic Details
Published in:Journal of applied polymer science 2014-08, Vol.131 (15), p.np-n/a
Main Authors: Nobukawa, Shogo, Hayashi, Hiroki, Shimada, Hikaru, Kiyama, Ayumi, Yoshimura, Hiroshi, Tachikawa, Yutaka, Yamaguchi, Masayuki
Format: Article
Language:English
Subjects:
Applied sciences
Birefringence
Blends
Cellulose acetate
Cellulose and derivatives
cellulose and other wood products
Cellulose esters
Correlation
Esters
Exact sciences and technology
Materials science
Natural polymers
Oligomers
optical properties
Orientation
Physicochemistry of polymers
plasticize
Polymers
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Summary:ABSTRACT Molecular orientation of two aromatic additives in cellulose acetate propionate (CAP) matrix was investigated from orientation birefringence data and an intermolecular orientation correlation represented by nematic interaction (NI) was evaluated. Poly(ethylene terephthalate) (PET) and poly(ethylene naphthalate) (PEN) oligomers with low molecular weight (ca. 400 g mol−1) were used as the additives. The NI strengths of CAP‐PET and CAP‐PEN were determined to be 0.28 ± 0.05 and 0.96 ± 0.15, respectively. In particular, compared with other polymer/polymer and polymer/small additive blends, the NI value in CAP/PEN blend is much stronger and represents the perfect orientation correlation. The strong orientation correlation is possibly due to the rigid naphtalate structure in PEN. Contrary, a relation between birefringence and orientation function for CAP in bulk and blend showed the same trend, suggesting that the orientation behavior of CAP determines the orientation birefringence. As two ester groups in CAP are responsible for birefringence, the alignment of the ester groups is affected by only the main chain orientation. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40570.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.40570