《Silicone Hyperbranched Resins with High Solid Content》.pdf

Thermal, Hydrolytic, Anticorrosive, and Tribological Properties of Alkyd-Silicone Hyperbranched Resins with High Solid Content 1,2,3 ´ 2,3 1 Edwin A. Murillo, Betty L. Lopez, Witold Brostow 1Laboratory of Advanced Polymers Optimized Materials (LAPOM), Department of Materials Science and Engineering and Center for Advanced Research and Technology (CART), University of North Texas, 3940 North Elm Street, Denton, TX 76207 2 ´ Grupo Ciencia de los Materiales, Instituto de Quımica, Universidad de Antioquia, Calle 62, ´ 52 59 Medellın, Antioquia, Colombia 3 ´ ´ Departamento de Ingenierıa Metalurgica y de Materiales, Universidad de Antioquia, ´ ´ Calle 67 Numero 53-108 Medellın, Antioquia, Colombia Received 2 August 2010; accepted 4 April 2011 DOI 10.1002/app.34611 Published online 22 November 2011 in Wiley Online Library (). ABSTRACT: Novel alkyd hyperbranched resins (AHBRs) Thermal stability was studied also by acid value analysis. modified with a Z-6018 silicone (a polysiloxane intermedi- Grafting increases the number average molecular mass, ate) and with high solid content were synthesized by etheri- enhances thermal stability, and improves significantly fication reaction using an acid catalyst. Different molar hydrolytic stability. Corrosion resistance on steel is ratios of AHBR to silicone were used. Structural, thermal, improved by two orders of magnitude, hence our modified hydrolytic, anticorrosive, and tribological properties were materials can be used as highly effective anticorrosion coat- studied using infrared (IR) analysis, nuclear magnetic reso- ings. Grafting lower