Interferometric determination of the refractive indices and birefringence of some highly oriented fibres

Hamza, A.A.; Sokkar, T.Z.N.; El‐Bakary, M. A.

doi:10.1016/j.optlastec.2004.11.017

Cited by 5 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The birefringence data of PET and PEN with high molecular weights were reported. 35,36 However, Dn of PET and PEN oligomers used in this study had the different wavelength dispersion from the reported data because the end-group more dominantly affects the birefringence Figure 5. Stress-strain curves with the initial draw rate of 0.05 s 21 for CAP and CAP/additive blends.…”

Section: Separation Of Birefringence Into Two Componentsmentioning

confidence: 66%

“…CAP exhibits the extraordinary wavelength dispersion . In contrast, PET and PEN oligomers show ordinary dispersion similarly to PET and PEN with high molecular weights . By applying eq.…”

Section: Resultsmentioning

confidence: 99%

“…14 In contrast, PET and PEN oligomers show ordinary dispersion similarly to PET and PEN with high molecular weights. 36 By applying eq. (9), Dn of the blends were separated into CAP and additive components, Dn CAP and Dn add , respectively.…”

Section: Separation Of Birefringence Into Two Componentsmentioning

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

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

Section: Separation Of Birefringence Into Two Componentsmentioning

confidence: 66%

“…CAP exhibits the extraordinary wavelength dispersion . In contrast, PET and PEN oligomers show ordinary dispersion similarly to PET and PEN with high molecular weights . By applying eq.…”

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

View full text Add to dashboard Cite

show abstract

“…Hamza et al . (, , ) studied the spectral dispersion curves of regular or irregular cross‐sections. Moreover, Belal et al .…”

Section: Introductionmentioning

confidence: 99%

“…Chromatic dispersion of polymeric fibres can be accurately measured using the VAWI technique, which uses spectraldomain white light interferometry. Hamza et al (1999Hamza et al ( , 2002Hamza et al ( , 2006 studied the spectral dispersion curves of regular or irregular cross-sections. Moreover, Belal et al (2005) investigated the effect of temperature on the chromatic dispersion of PP fibres.…”

Section: Introductionmentioning

confidence: 99%

A proposed method to reconstruct the three‐dimensional dispersion profile of polymeric fibres based on variable wavelength interferometry

Hamza

Sokkar

El‐Farahaty

et al. 2014

Journal of Microscopy

Self Cite

View full text Add to dashboard Cite

In this paper, we suggest a modification to the conventional variable wavelength interferometry. This modification allowed us to calculate the dispersion curve of each point inside polymeric fibres instead of calculating the mean dispersion of these fibres. This modified mathematical treatment was used to calculate the three-dimensional dispersion profile of isotactic polypropylene fibres suffering from necking deformation. The different steps of calculating the three-dimensional dispersion profile of the fibre were demonstrated. The application of this modified method revealed the variation of the fibre material dispersion before, inside and after the necking region. In addition, the birefringence profile of the necked isotactic polypropylene was determined using the proposed mathematical treatment. This allowed us to diagnose the interaction of the incident waves with necked polypropylene fibres, which gives extensive information on the orientation of the molecular chains during the formation of the necking phenomenon.

show abstract

Measurement of the spectral dispersion curves of low birefringence polymer fibres

Hamza

Belal

Sokkar

et al. 2007

Optics and Lasers in Engineering

View full text Add to dashboard Cite

Interferometric determination of the refractive indices and birefringence of some highly oriented fibres

Cited by 5 publications

References 11 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

A proposed method to reconstruct the three‐dimensional dispersion profile of polymeric fibres based on variable wavelength interferometry

Measurement of the spectral dispersion curves of low birefringence polymer fibres

Contact Info

Product

Resources

About