Premium
The glass transition temperature of nitrated polystyrene/poly(acrylic acid) blends
Author(s) -
AlNajjar Mohammed M.,
Hamid S. Halim,
Hamad Esam Z.
Publication year - 1996
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10604
Subject(s) - polystyrene , glass transition , differential scanning calorimetry , materials science , acrylic acid , polymer , polymer chemistry , hydrogen bond , phase (matter) , analytical chemistry (journal) , chemical engineering , thermodynamics , composite material , molecule , organic chemistry , chemistry , copolymer , physics , engineering
Low‐molecular‐weight polystyrene was nitrated to different levels. The nitrated polystyrene was blended with different molecular weights of poly(acrylic acid), PAA. The glass transition temperatures ( T g ) for the mixtures were investigated by differential scanning calorimetry. A single T g was observed for all blends, indicating single‐phase blends. In general, it was found that the T g increases with molecular weight of PAA. The T g values of the blends showed a positive deviation from the linear average T g as a result of strong hydrogen bonding between the segments of the component polymers. The observed T g values were not adequately represented by simple predictive equations or by single‐parameter fitting equations. However, two‐parameter fitting equations gave a reasonable representation of the data.