Thermogravimetric analysis of PVC/NR-b-PU blends

Thermal stability of solution-cast blends of poly(vinylchloride) and NR-b-PU block copolymers of three different chain extender diols was studied by thermogravimetry. Thermal degradation of individual components and their blends were investigated with special reference to blend ratio. As the block c...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2011-03, Vol.103 (3), p.863-872
Main Authors: Radhakrishnan Nair, M. N., Gopinathan Nair, M. R.
Format: Article
Language:English
Subjects:
Analysis
Analytical Chemistry
Applied sciences
Blends
Block copolymers
Chemical reactions and properties
Chemistry
Chemistry and Materials Science
Degradation
Exact sciences and technology
Inorganic Chemistry
Measurement Science and Instrumentation
Organic polymers
Physical Chemistry
Physicochemistry of polymers
Polymer blends
Polymer Sciences
Polyvinyl chlorides
Segments
Thermal degradation
Thermal stability
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Summary:Thermal stability of solution-cast blends of poly(vinylchloride) and NR-b-PU block copolymers of three different chain extender diols was studied by thermogravimetry. Thermal degradation of individual components and their blends were investigated with special reference to blend ratio. As the block copolymer content in the blends increased their thermal stability was also found to increase. Enhanced thermal stability of PVC is believed due to the favorable interaction with PVC and the PU hard segments of the block copolymer. DTG curves were used for the determination of different stages involved in the degradation. Activation energy for degradation was determined from Coats–Redfern plot.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-010-1113-1