Positron lifetime studies on the free volume changes during curing of rubber-carbon black composites

2007 ◽  
Vol 4 (10) ◽  
pp. 3763-3766 ◽  
Author(s):  
V. O. Jobando ◽  
C. A. Quarles
Keyword(s):  
Carbon Black ◽  
Free Volume ◽  
Positron Lifetime ◽  
Volume Changes ◽  
Lifetime Studies

Positron Annihilation Lifetime Studies on Free Volume Changes in Polymers by CO2 Conditioning

1994 ◽  
Vol 175-178 ◽  
pp. 789-792 ◽  
Author(s):  
K. Tanaka ◽  
M. Ito ◽  
Hideki Kita ◽  
Katsutomo Okamoto ◽  
Yasuo Ito
Keyword(s):  
Positron Annihilation ◽  
Free Volume ◽  
Volume Changes ◽  
Positron Annihilation Lifetime ◽  
Lifetime Studies

Positron annihilation lifetime studies of free volume changes in polycarbonate under static tensile deformation

1992 ◽  
Vol 25 (9) ◽  
pp. 2407-2411 ◽  
Author(s):  
M. Y. Ruan ◽  
H. Moaddel ◽  
A. M. Jamieson ◽  
R. Simha ◽  
J. D. McGervey
Keyword(s):  
Positron Annihilation ◽  
Free Volume ◽  
Tensile Deformation ◽  
Volume Changes ◽  
Positron Annihilation Lifetime ◽  
Static Tensile ◽  
Lifetime Studies

Free Volume Distributions in Ultrahigh and Lower Free Volume Polymers:  Comparison between Molecular Modeling and Positron Lifetime Studies

2002 ◽  
Vol 35 (6) ◽  
pp. 2129-2140 ◽  
Author(s):  
D. Hofmann ◽  
M. Heuchel ◽  
Yu. Yampolskii ◽  
V. Khotimskii ◽  
V. Shantarovich
Keyword(s):  
Molecular Modeling ◽  
Free Volume ◽  
Positron Lifetime ◽  
Lifetime Studies

Free Volume Changes in Bulk Amorphous Alloys During Structural Relaxation and in the Supercooled Liquid State

1998 ◽  
Vol 554 ◽  
Author(s):  
C. Nagel ◽  
K. Rätzke ◽  
E. Schmidtke ◽  
F. Faupel
Keyword(s):  
Free Volume ◽  
Metallic Glasses ◽  
Structural Relaxation ◽  
Amorphous Alloys ◽  
Excess Volume ◽  
Positron Lifetime ◽  
Supercooled Liquid ◽  
Mechanical Tests ◽  
Volume Changes ◽  
Shallow Traps

AbstractVolume changes in Zr46.7Ti8.3Cu7.5Ni10Be27.5 and Zr 65Al7.5Ni10Cu17.5 bulk metallic glasses have been observed by positron annihilation and density measurements. At low cooling rates excess volume of the order of 0.1 % is quenched in both glasses. Isothermal relaxation kinetics below the glass transition temperature obey a Kohlrausch law with exponents of β≈(0.3 ± 0.1). Structural relaxation is not accompanied by embrittlement, as indicated by simple mechanical tests. The outer surface plays a crucial role in annealing of excess volume, which can be restored by annealing above Tg. The observed free volume changes are at variance with the behavior of a perfectly strong glass. The temperature dependence of the positron lifetime is discussed in terms of thermal detrapping from shallow traps.

Free volume and glass transition in ethylene/1-octene copolymers: positron lifetime studies and dynamic mechanical analysis

Polymer ◽  
2002 ◽  
Vol 43 (25) ◽  
pp. 6973-6983 ◽  
Author(s):  
D. Kilburn ◽  
D. Bamford ◽  
T. Lüpke ◽  
G. Dlubek ◽  
T.J. Menke ◽  
...  
Keyword(s):  
Glass Transition ◽  
Dynamic Mechanical Analysis ◽  
Free Volume ◽  
Positron Lifetime ◽  
Mechanical Analysis ◽  
Dynamic Mechanical ◽  
Lifetime Studies
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