Effect of aromatic additives with various alkyl groups on orientation birefringence of cellulose acetate propionate

Nobukawa, Shogo; Aoki, Yoshihiko; Yoshimura, Hiroshi; Tachikawa, Yutaka; Yamaguchi, Masayuki

doi:10.1002/app.39609

Cited by 15 publications

(27 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…. Therefore, the difference in orientation birefringence between CAP and the blend is originated from the additive orientation as examined in previous articles …”

Section: Resultsmentioning

confidence: 81%

“…Now, the effect of PET and PEN on birefringence is compared with that in the other polymer blends. In previous works, we reported that aromatic additives such as TCP, dioctyl phthalate (DOP), and various kinds of ester compounds enhance the birefringence of CAP. The increment by the additives was just 5 × 10 −4 at the same experimental conditions with this study.…”

Section: Resultsmentioning

confidence: 99%

“…The SOR is not allowed to separate the birefringence into components for CAP blends . Therefore, in order to evaluate the contributions of PET and PEN to Δ n of the blends, the information of their wavelength dispersion, Δ n (λ)/Δ n (λ 0 ), is necessary as represented in a following equation.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

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

Nobukawa

Hayashi

Shimada

et al. 2014

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…. Therefore, the difference in orientation birefringence between CAP and the blend is originated from the additive orientation as examined in previous articles …”

Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

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

Nobukawa

Hayashi

Shimada

et al. 2014

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this study, however, the molecular weight of XylAc is ten times lower than that of CTA, meaning that the difference in the orientation relaxation time is larger than that in PS/PPO system. In previous works (Nobukawa et al 2013(Nobukawa et al , 2014a, we investigated the ratio of F in cellulose acetate propionate (CAP) and ester oligomers. Although the oligomers have much lower molecular weight than the matrix CAP, the molecular orientation is consistent with the matrix CAP due to the intermolecular orientation correlation, which is called as nematic interaction (Doi et al 1989).…”

Section: Orientation Birefringence Of Stretched Filmsmentioning

confidence: 99%

Effect of acetylation site on orientation birefringence of cellulose triacetate

et al. 2015

Self Cite

View full text Add to dashboard Cite

The effect of a substitution site on orientation birefringence for cellulose triacetate (CTA) was investigated by the addition of xylan ester. Since CTA has three substitution sites (C-2, C-3, and C-6) while xylan ester has two substitution sites (C-2 and C-3), the change of birefringence by xylan acetate (XylAc) is attributed to the contribution of the C-6 acetyl group. Dynamic mechanical analysis and thermal measurements showed a single glass transition peak, indicating that XylAc is miscible with CTA at any compositions. The orientation birefringence (Dn) of CTA/XylAc films stretched beyond the glass transition temperature increased with increasing the XylAc content. The result for the stretched film suggested that the contribution of acetyl group in the C-2 and C-3 sites to Dn is positive while that in the C-6 is negative. The negative sign for the C-6 site is in agreement with the result simulated by using the molecular dynamics method. In addition, Dn of CTA films containing xylan propionate (or butyrate) indicated that the propionyl and butyryl groups in the C-2 and C-3 sites show positive birefringence similar to the acetyl group.

show abstract

“…With decreasing of the free volume, the amplitude of the local motion for beta relaxation becomes smaller (Yamaguchi and Arakawa 2007b;Nobukawa et al 2013).…”

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

Miscible Transparent Polymethylmethacrylate/Cellulose Acetate Propionate Blend: Optical, Morphological, and Thermomechanical Properties

Raouf¹,

Wahab²,

Ibrahim³

et al. 2016

BioResources

View full text Add to dashboard Cite

To obtain a high transmittance blend within ultraviolet and visible regions, various transparent samples of ascending percentages of polymethylmethacrylate (PMMA)/cellulose acetate propionate (CAP) were prepared by melt blending using a twin screw extruder. These blends were characterised by ultraviolet-visible spectroscopy, and the curves illustrated that the blending ratio of 10% CAP in PMMA meets the required purpose. The morphological, mechanical, and thermal properties for pure PMMA and the PMMA/CAP 10% blend were investigated using X-ray diffraction, scanning electron microscopy, dynamic mechanical analysis, and thermogravimetric analysis. The results showed that the PMMA/CAP 10% blend has an amorphous structure and low stiffness than pure PMMA. The miscible PMMA/CAP 10% blend exhibited mechanical stability below the glass transition temperature (Tg), with a slight increase in Tg value relative to that of pure PMMA. The study also demonstrated that the intermolecular interaction between blend elements has an effective influence on the physical properties of the blend.

show abstract

Effect of aromatic additives with various alkyl groups on orientation birefringence of cellulose acetate propionate

Cited by 15 publications

References 30 publications

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

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

Effect of acetylation site on orientation birefringence of cellulose triacetate

Miscible Transparent Polymethylmethacrylate/Cellulose Acetate Propionate Blend: Optical, Morphological, and Thermomechanical Properties

Contact Info

Product

Resources

About