EMULSION STYRENE BUTADIENE RUBBER E-SBR
1.0 INTRODUCTION
2.0 HISTORY
3.0 CHEMISTRY AND PRODUCTION
4.0 PROPERTIES
4.1. MECHANICAL
4.2 ELECTRICAL
4.3. RESISTANCE TO FLUIDS
4.4. CURE PROPERTIES
5.0 TYPES OF E-SBR
6.0. USES OF E-SBR
7.0 WORLD PRODUCTION FACILITIES1.0 INTRODUCTION: Emulsion polymerized styrene-butadiene rubber (E-SBR) is one of the most widely used polymers in the world today. The purpose of this article is to briefly review the history, production, chemistry, properties, and uses of E-SBR. Emulsion SBR is employed in many demanding applications, which enhance the quality of life and contribute significantly to our economy and standards of living.2.0 HISTORY: In the 1930’s, the first emulsion polymerized SBR known as Buna S was prepared by I. G. Farbenindustrie in Germany. The U. S. Government in 1940 established the Rubber Reserve Company to start a stockpile of natural rubber and a synthetic rubber program. These programs were expanded when the United States entered World War II. The synthetic rubber efforts were initially focused on a hot polymerized (41° C) E-SBR. Production of a 23.5% styrene and 76.5% butadiene copolymer began in 1942. Cold polymerized E-SBR (5°C), that has significantly better physical properties than hot polymerized SBR, was developed in 1947. Between 1946 and 1955 the synthetic rubber plants owned by the US Government were sold to the private industry or closed.
Date：2006-9-10