Rubber toughening and damage competition theory. In material selection it is important to look at the interaction between the matrix and the secondary phase. For example, crosslinking within the rubber phase will promote high strength fibril formation that will toughen the rubber, preventing particle fracture. Carboxyl-terminated butadiene-acrylotnitrile (CTBN) is often used to toughen epoxies, but using CTBN alone increases the toughness at the cost of stiffness and heat resistance. Amine-terminated butadiene acrylonitrile (ATBN) is also used. Using ultra-fine full-vulcanized powdered rubber (UFPR) researchers have been able to improve all three, toughness, stiffness, and heat resistance simultaneously, resetting the stage for rubber toughening
Texas Gulf Sulfur Company Texas Gulf Sulfur Company The Texas Gulf Sulphur Company was one of the largest sulfur mining companies in the world from 1919 to 1981. The Gulf Sulphur Company was formed on December 23, 1909 by a group of investors from St. Louis and Texas. The company was formed to exploit the newly discovered sulfur deposit in the Big Hill salt dome near Matagorda, Texas, using the Frasch Process. In 1916 Bernard Baruch and J.P. Morgan took control of the company and Seeley W. Mudd became President. On 16 July 1918, the company was renamed the Texas Gulf Sulphur Company. Construction