Experimental evidence of co-existence of equilibrium and nonequilibrium in two-glass-transition miscible mixtures

2020 ◽  
Vol 22 (44) ◽  
pp. 25631-25637
Author(s):  
Xiao Jin ◽  
Yuxing Guo ◽  
Wenkang Tu ◽  
Shidong Feng ◽  
Yingdan Liu ◽  
...  
Keyword(s):  
Glass Transition ◽  
Experimental Evidence ◽  
Equilibrium States ◽  
Glass Transitions ◽  
Existence Of Equilibrium ◽  
Molecular Mixtures

Two glass-transitions have been observed in some miscible molecular mixtures with notable differences in geometry or chemistry of constituents. Ageing between the high and low glass transitions confirm the co-existence of nonequilibrium and equilibrium states in the regions.

Multiple Glass Transitions in Butadiene—Acrylonitrile Copolymers. II. Formation of Incompatible Phases during Copolymerization

1973 ◽  
Vol 46 (4) ◽  
pp. 1087-1102 ◽  
Author(s):  
A. H. Jorgensen ◽  
L. A. Chandler ◽  
E. A. Collins
Keyword(s):  
Glass Transition ◽  
Published Data ◽  
Transition Temperatures ◽  
Glass Transitions ◽  
Glass Transition Temperatures ◽  
Mechanical Measurements ◽  
Nitrile Rubbers ◽  
Polymer Compatibility ◽  
Two Phases ◽  
Acrylonitrile Copolymers

Abstract Differential Thermal Analysis and Dynamic Mechanical measurements show that the presence of two glass transition temperatures in nitrile rubbers is not unusual. Two glass transition temperatures occur in all commercial non-crosslinked butadiene-acrylonitrile rubbers of less than 35 per cent acrylonitrile even though they have gone previously undetected. We have investigated the changes in composition and glass transition temperatures during the course of the copolymerization. The composition versus conversion results were in agreement with previously published data. Fractionation and polymer-polymer compatibility experiments were used to demonstrate the presence of two incompatible phases of different acrylonitrile content, corresponding to the glass transitions of the original co-polymer. The mechanism for the formation of these two phases is discussed.

scholarly journals Experimental Evidence for a Cluster Glass Transition in Concentrated Lysozyme Solutions

2019 ◽  
Vol 123 (10) ◽  
pp. 2432-2438 ◽  
Author(s):  
Maxime J. Bergman ◽  
Tommy Garting ◽  
Peter Schurtenberger ◽  
Anna Stradner
Keyword(s):  
Glass Transition ◽  
Experimental Evidence
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