Viscometric study of high-cis polybutadiene in toluene solution

• Main Authors: Mello Ivana L., Delpech Marcia C., Coutinho Fernanda M. B., Albino Fernanda F. M.
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2006-01-01
• Series: Journal of the Brazilian Chemical Society
• Subjects: polybutadiene; viscosity; molecular weight; single point determination
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000100028

Viscometric measurements, in toluene solution at 30 ºC, were performed with high-cis polybutadiene synthesized by neodymium based catalyst. Six different equations were used to calculate intrinsic viscosities and viscosimetric constant values: Huggins, Kraemer, Martin and Schulz-Blaschke by graphic extrapolation, and Solomon-Ciuta, Deb-Chanterjee and again Schulz-Blaschke, through a single point determination. The molecular weight of the polymers was also determined applying Mark-Houwink-Sakurada equation using the values of intrinsic viscosity obtained by the six equations. The values of intrinsic viscosity and viscosity-average molecular weight obtained by the two methods were compared in order to verify the validity of the single point determination for high-cis polybutadiene.