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On the influence of the supermolecular structure on structural relaxation in the glass transition zone: free volume approach
polymers free volume a relaxation
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2009/2/6
The idea of two miscellaneous amorphous fractions in polymer is discussed. The effect of free volumeon the segmental relaxation behaviour is examined for a wide range of polymers. The orientation of t...
Estimating the fractional free volume parameter in polyethylene by the positron annihilation method
positron annihilation polymers free volume
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2009/2/6
Positron annihilation lifetime measurements were performed on samples made of commercially availablepolyethylene (PE) (Lupolen 2012D, schwarz 413, made by BASF). The samples were isothermallyannealed ...
Free volume studies in polyamide, acrylic rubber and their blend
free volume polymer blends positron annihilation positronium
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2009/2/6
Semicrystalline polyamide 6 (PA), acrylic rubber P(n-BA-co-MMA) and their blend PA/P(n-BA-co-
MMA, containing 75 wt.% of PA) have been examined with use of DSC, PVT, WAXS, SAXS, notch
impact strengt...