Sage Journals: Discover world-class research

Abstract

Radiative properties of fibers are wavelength and angular dependent. Cross sections of fibers depend on the direction of the incoming radiation. Measurements of the total and diffuse near-normal hemispherical spectral reflectances of polypropylene fibers over two wavelength ranges (0.25–2.5 μm and 2.5–15.5 μm) show that reflectance is higher when fibers are aligned parallel to the cell boundaries and lower when they are oriented perpendicular to the cell boundaries. The insulating property of the material is increased in the first case, and the radiative heat transfer is at a maximum in the second case. The effect of fiber diameter is also shown to give opposite variations for the two wavelength ranges.

Keywords

Polypropylene Specular reflectance Diffuse reflectance Fourier transform infrared spectroscopy Fiber orientation

Get full access to this article

View all access options for this article.

References

Miller

C. E.

, Appl. Spectrosc. Rev. 26, 277 (1991).

Elliott

Hanby

W. E.

and Malcolm

B. R

, British J. of Appl. Phys. 5, 377 (1954).

Montalvo

J. G.

Jr. Faught

S. E.

and Buco

S. M

, Appl. Spectrosc. 43, 1459 (1989).

Montalvo

J. G.

Jr. , Appl. Spectrosc. 45, 779 (1991).

Mackenzie

M. W.

, Advances in Applied Fourier Transform Infrared Spectroscopy (John Wiley, New York, 1988).

Tungol

M. W.

Bartick

E. G.

and Montaser

, Appl. Spectrosc. 44, 543 (1990).

Tungol

M. W.

Bartick

E. G.

and Montaser

, J. of Forensic Sc. JFSCA 36, 1027 (1991).

Tungol

M. W.

Bartick

E. G.

and Montaser

, Spectrochim. Acta 46B, 1535 E (1991).

Bartick

E. G.

, “Considerations for Fiber Sampling with Infrared Microspectroscopy,” in The Design, Sample Handling and Applications of Infrared Microscopes, ASTM, STP 949, Roush

P. B.

, Ed. (American Society for Testing and Materials, Philadelphia, 1987), p. 64.

10.

Siesler

H. W.

, Makromol. Chem. Macromol. Symp. 52, 113 (1991).

11.

McKenzie

M. T.

Culler

S. R.

and Koenig

J. L

, Appl. Spectrosc. 38, 786 (1984).

12.

Lee

S. C.

, J. Quant. Spectrosc. Radiat. Transfer 36, 253 (1986).

13.

Lee

S. C.

, J. Thermophysics Heat Transfer 2, 303 (1988).

14.

Lee

S. C.

, Int. J. Heat and Mass Transfer 32, 311 (1989).

15.

Lee

S. C.

, Int. J. Heat and Mass Transfer 33, 2183 (1990).

16.

Lee

S. C.

, J. Quant. Spectrosc. Radiat. Transfer 48, 119 (1992).

17.

Tong

T. W.

and Tien

C. L

, Trans. of the ASME 105, 70 (1983).

18.

Tong

T. W.

Yang

Q. S.

and Tien

C. L

, Trans. of the ASME 105, 76 (1983).

19.

Wang

K. Y.

and Tien

C. L

, J. Quant. Spectrosc. Radiat. Transfer 30, 213 (1983).

20.

Cohen

L. D.

Haracz

R. D.

Cohen

and Acquista

, Appl. Opt. 22, 742 (1983).

21.

Houston

R. L.

and Korpela

S. A

, Proc. 7th Int. Heat Transf. Conf. (Munchen) 2, 499 (1982).

22.

Van de Hulst

H. C.

, Light Scattering by Small Particles (John Wiley, New York, 1957).

23.

Boulet

, Thèse de Doctorat d'Université, Nancy 1 (1992).

24.

Papini

, Solar Ener. Mater. Solar Cells 29, 221 (1993).

25.

Skaare

L. E.

Klaeboe

and Nielsen

C. J

, Vibrational Spectrosc. 3, 23 (1992).

26.

Goddu

R. F.

and Delker

D. A

, Anal. Chem. 32, 140 (1960).

27.

Wheeler

O. H.

, Chem. Rev. 59, 629 (1959).

28.

Klee

and Hummel

D. O

, Makromol. Chem. Macromol. Symp. 52, 141 (1991).

29.

Barton

F. E.

II Himmelsbach

D. S.

Duckworth

J. H.

and Smith

M. J

, Appl. Spectrosc. 46, 420 (1992).

30.

Chalmers

J. M.

Mackenzie

M. W.

and Willis

H. A

, Spectrochim. Acta 47A, 1677 (1991).

31.

Handbook of Organic Structural Analysis, Yukawa

, Ed. (W. A. Benjamin, New York, 1965).

32.

Polymer Handbook, Brandrup

and Immergut

E. H

, Eds. (John Wiley, New York, 1989), 3rd ed.

Influence of the Orientation of Polypropylene Fibers on Their Radiative Properties

Abstract

Keywords

Get full access to this article

References