Glass-transition temperature and microstructure of polybutadienes |
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Authors: | N Makhiyanov E V Temnikova |
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Institution: | 1.OAO Nizhnekamskneftekhim, Nizhnekamsk,Tatarstan,Russia |
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Abstract: | DSC and NMR are employed to determine the glass-transition temperatures and the structural features of polybutadienes with
widely varying configuration isomeric compositions. The dependences of the glass-transition temperature on the contents of
cis-1,4-, trans-1,4, and 1,2-units in polybutadiene chains are plotted and discussed. An analysis of the experimental results and the published
data suggests that, in the study of the glass-transition-structure relationship, simplified approaches are inapplicable and
it is necessary to consider the configurational and conformational geometry of polybutadiene chains. |
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