Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-05T05:27:19.486Z Has data issue: false hasContentIssue false
  • English
  • Français

Study of Spherulites in a Semi-Crystalline Polymer Using Acoustic Microscopy

Published online by Cambridge University Press:  21 February 2011

J. Y. Duquesne ,
K. Yamanaka ,
C. Neron ,
C. K. Jen ,
L. Piche  and
G. Lessard
J. Y. Duquesne
Affiliation:
Industrial Materials Research Institute, National Research Council of Canada, 75 Boul. de Mortagne, Boucherville, Quebec J4B 6Y4, Canada
K. Yamanaka
Affiliation:
Industrial Materials Research Institute, National Research Council of Canada, 75 Boul. de Mortagne, Boucherville, Quebec J4B 6Y4, Canada
C. Neron
Affiliation:
Industrial Materials Research Institute, National Research Council of Canada, 75 Boul. de Mortagne, Boucherville, Quebec J4B 6Y4, Canada
C. K. Jen
Affiliation:
Industrial Materials Research Institute, National Research Council of Canada, 75 Boul. de Mortagne, Boucherville, Quebec J4B 6Y4, Canada
L. Piche
Affiliation:
Industrial Materials Research Institute, National Research Council of Canada, 75 Boul. de Mortagne, Boucherville, Quebec J4B 6Y4, Canada
G. Lessard
Affiliation:
Industrial Materials Research Institute, National Research Council of Canada, 75 Boul. de Mortagne, Boucherville, Quebec J4B 6Y4, Canada
Get access

Abstracts

The local elastic properties of a semi-crystalline polymer (isotactic polypropylene) have been investigated with the use of scanning acoustic microscopy (SAM) techniques. The operating frequency was 775 MHz and the temperatures ranged between 25 and 60°C. A new and effective signal processing method was developed to process the material signature V(z) curve. This method avoids complicated calibration procedures involved with operating the SAM lens at different temperatures. Longitudinal velocities VL(α) and VL(β) in individual α and β-type spherulites of isothermally crystalized samples have been measured. Acoustic velocity of a quenched sample was also obtained. It was found that vL(α) and VL(β) were nearly equal but the acoustic impedances of α and β-spherulites were unexpectedly very different.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 142: Symposium U – Nondestructive Monitoring of Materials Properties , 1988 , 253
Copyright
Copyright © Materials Research Society 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

[1] Crissman, J.M., J. Polymer Sci., A-2, 7, 389 (1969).Google Scholar
[2] Jacoby, P., Bersted, B.H., Kissel, W.J. and Smith, C.E., J. Polymer Sci., B, 24, 461 (1986).Google Scholar
[3] Turner-Jones, A., Aizlewood, J.M. and Beckett, D.R., Makromol. Chem., 75, 134 (1964).Google Scholar
[4] Tucker, P.A. and Wilson, R.G., J. Polymer Sci., Polymer Lett. Ed., 18, 97 (1980).Google Scholar
[5] Weglein, R.D., Appl. Phy. Lett., 34, 179 (1979).Google Scholar
[6] Kushibiki, J. and Chubachi, N., IEEE Trans. Son. and Ultrason., SU–32, 189 (1985).Google Scholar
[7] Greenspan, M. and Tschiegg, C.E., J. Res. Nat. Bureau of Standards, 59, 249 (1957).CrossRefGoogle Scholar
[8] Neubauer, W.G., J. Appl. Phys., 44, 48 (1972).Google Scholar
[9] Padden, F.J. and Keith, H.D., J. Appl. Phys., 30, 1479 (1959).Google Scholar
[10] Norton, D.R. and Keller, A., Polymer, 26, 704 (1985).Google Scholar
[11] Lovinger, A.J., Chua, J.O. and Gryte, C.C., J. Polymer Sci., Polymer Phys. Ed., 15, 641 (1977).Google Scholar
[12] Liang, K.K., Proc. Ultrasonics Symp., 1141 (1987).Google Scholar