Volume 120, Issue 6 pp. 3151-3158

Effect of tall oil fatty acids content on the properties of novel hyperbranched alkyd resins

Edwin A. Murillo

Corresponding Author

Edwin A. Murillo

Grupo Ciencia de los Materiales, Universidad de Antioquia, Calle 62 52-59 Medellín, Antioquia, Colombia

Grupo Ciencia de los Materiales, Universidad de Antioquia, Calle 62 52-59 Medellín, Antioquia, Colombia===Search for more papers by this author
Pedro P. Vallejo

Pedro P. Vallejo

Grupo Ciencia de los Materiales, Universidad de Antioquia, Calle 62 52-59 Medellín, Antioquia, Colombia

Search for more papers by this author
Betty L. López

Betty L. López

Grupo Ciencia de los Materiales, Universidad de Antioquia, Calle 62 52-59 Medellín, Antioquia, Colombia

Search for more papers by this author
First published: 10 February 2011
Citations: 38

Abstract

Hyperbranched alkyd resins (HBRA) were synthesized by modification of hydroxylated hyperbranched polyester (HBP1-4) with tall oil fatty acids (TOFA). The core is a hydroxylated hyperbranched polyester of fourth generation with OH groups in the periphery (18), which is endcapped with tall oil fatty acids. The occurrence of these reactions, HBP1-4 and TOFA, was determined by making use of acid value, nuclear magnetic resonance, and hydroxyl values. The effects of TOFA and HBP1-4 on properties of the HBRA resins were investigated by vapor pressure osmometry, differential scanning calorimetry, thermogravimetric analysis, friction resistance, and hardness. The resins with higher modification percentage (HBRA4) presented the best thermal and hydrolytic stability, but lower friction resistance and hardness. All HBRA resins presented amorphous characteristics, OH groups, and double bonds in the periphery. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.