Sequence Distribution-Glass Transition Effects. III. α-Methylstyrene-Acrylonitrile Copolymers

1973 ◽  
Vol 6 (3) ◽  
pp. 453-456 ◽  
Author(s):  
N. W. Johnston
Keyword(s):  
Glass Transition ◽  
Sequence Distribution ◽  
Transition Effects ◽  
Acrylonitrile Copolymers

The effect of sequence distribution on glass transition in the theory of the cooperative Behaviour of random copolymers

1981 ◽  
Vol 4 (1-2) ◽  
pp. 9-16 ◽  
Author(s):  
Ivan Havlíček ◽  
Ján Biroš ◽  
Jiří Podešva ◽  
Jaroslav Hrouz
Keyword(s):  
Glass Transition ◽  
Random Copolymers ◽  
Cooperative Behaviour ◽  
Sequence Distribution

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.

Vinyl alcohol-vinyl propionate copolymers: sequence distribution and glass transition

Polymer ◽  
1988 ◽  
Vol 29 (12) ◽  
pp. 2244-2248 ◽  
Author(s):  
Manuel Sánchez-Chaves ◽  
Félix Arranz ◽  
Margarita Montes
Keyword(s):  
Glass Transition ◽  
Vinyl Alcohol ◽  
Sequence Distribution ◽  
Vinyl Propionate
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