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Differential Scanning Calorimetry. Study of Amylose and Its Derivatives
Author(s) -
Desai D. H.,
Patel C. K.,
Patel K. C.,
Patel R. D.
Publication year - 1973
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19730250504
Subject(s) - differential scanning calorimetry , amylose , glass transition , enthalpy of fusion , fusion , chemistry , polymer , polymer chemistry , melting temperature , chain (unit) , group (periodic table) , melting point , organic chemistry , materials science , thermodynamics , starch , composite material , linguistics , physics , philosophy , astronomy
Glass transition (T g ) and melting (T m ) temperatures of aliphatic and aromatic esters of amylose have been measured. As the chain length of pendent group is increased both T g and T m get decreased. An average value of T g /T m ≃0.8 obtained for these esters, showed that they are moderately less flexible unsymmetrical polymers. Heat of fusion (ΔH f ) for the esters has been calculated. In the case of aliphatic esters, it has been found that as the chain length of pendent group is increased, the heat of fusion is decreased.