Branching (polymer chemistry) Branching (polymer chemistry) In polymer chemistry, branching occurs by the replacement of a substituent, e.g., a hydrogen atom, on a monomer subunit, by another covalently bonded chain of that polymer; or, in the case of a graft copolymer, by a chain of another type. Branched polymers have more compact and symmetrical molecular conformations, and exhibit intra-heterogeneous dynamical behavior with respect to the unbranched polymers. In crosslinking rubber by vulcanization, short sulfur branches link polyisoprene chains (or a synthetic variant) into a multiply branched thermosetting elastomer. Rubber can also be so completely vulcanized that it becomes a rigid solid, so hard
Texas Gulf Sulfur Company by the Frasch Process to that date. The company entered the Mexican market in 1949, with its subsidiary Cia. Exploradora del Istmo, S.A. Headquarters were established in Coatzacoalcos in 1950, and production from their Nopalapa plant commenced in 1957. By 1958, Texas Gulf had produced 69,490,00 tons of sulfur, which was 53.7 percent of the total Frasch sulphur production from 1895 through 1957. In April 1972, the company became TexasGulf. In 1981 the company was acquired by Elf Aquitaine. Texas Gulf Sulfur Company The Texas Gulf Sulphur Company was one of the largest sulfur mining companies in the world from