Glass transition in poly(vinylpyrrolidone): effect of molecular weight and diluents

Amorphous poly(vinylpyrrolidone) (PVP) varying in molecular weight (MW) (10 000, 24 000, and 40 000) was used to study the effect of molecular weight on the glass transition temperature (Tg). Tg was measured by differential scanning calorimetry (DSC). Blends with several diluents (water, butylamine,...

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Bibliographic Details
Published in:Biotechnology progress 1992-03, Vol.8 (2), p.144-148
Main Authors: Buera, M. del P. (Rutgers University, New Brunswick, NJ), Levi, G, Karel, M
Format: Article
Language:English
Subjects:
AMIDAS
AMIDE
AMIDES
Biological and medical sciences
Biotechnology
CALORIMETRIA
CALORIMETRIE
CALORIMETRY
CHEMICOPHYSICAL PROPERTIES
differential scanning calorimetry
FOOD TECHNOLOGY
Fundamental and applied biological sciences. Psychology
glass transition temperature
Methods. Procedures. Technologies
MOLECULAR WEIGHT
Others
PESO MOLECULAR
phase transition
PHYSICAL PROPERTIES
PLASTICITY
PLASTICIZERS
POIDS MOLECULAIRE
POLYVIDONE
PROPIEDADES FISICO-QUIMICAS
PROPIEDADES REOLOGICAS
PROPRIETE PHYSICOCHIMIQUE
PROPRIETE RHEOLOGIQUE
RHEOLOGICAL PROPERTIES
TECHNOLOGIE ALIMENTAIRE
TECNOLOGIA DE LOS ALIMENTOS
TEMPERATURA
TEMPERATURE
Various methods and equipments
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Summary:Amorphous poly(vinylpyrrolidone) (PVP) varying in molecular weight (MW) (10 000, 24 000, and 40 000) was used to study the effect of molecular weight on the glass transition temperature (Tg). Tg was measured by differential scanning calorimetry (DSC). Blends with several diluents (water, butylamine, glycine, hexanal, xylose, glucose, and lysine) were also analyzed and the effect of blend composition on Tg was evaluated. The effect of average molecular weight and of composition in the blends of PVP‐plasticizer on Tg was well described by previously reported relationships developed for synthetic polymers. The quantitative results obtained can be used for formulation of mixtures with known Tg and for prediction of their behavior in storage.
ISSN:8756-7938
1520-6033
DOI:10.1021/bp00014a008