Calorimetric determination of head-to-head defect in poly(vinylidene fluoride)

Differential scanning calorimetric analyses were conducted on samples of poly(vinylidene fluoride) polymerized in an autoclave by tributylborane‐oxygen by free‐radical initiation at low temperature (‐70‐0°C). The peak melting points and the percent head‐to‐head defect in each polymer sample were det...

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Bibliographic Details
Published in:Journal of polymer science. Part B, Polymer physics Polymer physics, 1988-06, Vol.26 (6), p.1217-1225
Main Authors: Millich, F., Hauber, B. F.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Thermal and thermodynamic properties
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Summary:Differential scanning calorimetric analyses were conducted on samples of poly(vinylidene fluoride) polymerized in an autoclave by tributylborane‐oxygen by free‐radical initiation at low temperature (‐70‐0°C). The peak melting points and the percent head‐to‐head defect in each polymer sample were determined by a reported calorimetric method. A commercial sample showed a melting temperature in the range 157–162°C and a percent head‐to‐head defect of 7.7%; whereas two experimental samples showed melting temperatures in the range 172–179°C with a percent head‐to‐head defect of 4.4 and 4.9%. The calorimetric procedure was modified by reducing annealing times to only 2 h, which saves time and, as shown in this study, avoids thermal polymer degradation.
ISSN:0887-6266
1099-0488
DOI:10.1002/polb.1988.090260606