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Free volume evolution in polyoxymethylene studied by positron annihilation spectroscopy

✍ Scribed by E.E. Abdel-Hady; Hamdy F.M. Mohamed; Somia S. Fareed


Book ID
108256765
Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
147 KB
Volume
76
Category
Article
ISSN
0969-806X

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Free volume characteristics in three samples of monodisperse polystyrene were investigated by positron annihilation technique over a temperature range from 300 to 380 K. The numberaverage molecular weight of the samples ranged from 5730 to 1,524,000. The observed lifetime spectra were resolved into