Durability and Free Volume in Polymeric Coatings Studied by Positron Annihilation Spectroscopy

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Materials Science Forum (Volumes 445-446)

Edited by:

Toshio Hyodo, Yoshinori Kobayashi, Yasuyuki Nagashima, Haruo Saito

Pages:

274-276

Citation:

H. Chen et al., "Durability and Free Volume in Polymeric Coatings Studied by Positron Annihilation Spectroscopy", Materials Science Forum, Vols. 445-446, pp. 274-276, 2004

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January 2004

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[10] 5.

3 0 �3 (ns) Positron incident energy (keV) Epoxy I3 (%) �3.

[2] 85.

[4] 23.

[5] 18.

[5] 92.

[6] 54 R (Å) I3 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30.

39.

40.

41.

42.

43.

44.

45 Positron incident energy (keV) S parameter UV-313 Virgin 1 h 4 h 7 h 19 h 33 h 50 h 66 h 85 h.

[8] 27.

[6] 46.

[4] 83.

[3] 38.

[2] 13.

[1] 11.

0 0. 37 Mean depth (µm) Fig. 3 o-Ps lifetime (left scale) and intensity (right scale) vs positron incident energy in epoxy polymer for 85 hrs UV irradiation. Fig. 4 The S parameter vs positron incident energy for epoxy samples subjected to UVB-313 irradiation for different periods in an epoxy polymer.