Answer :
High styrene rubber ionomers were prepared by sulfonating styrene-butadiene rubber of high styrene content (high styrene rubber) in 1,2-dichloroethane using acetyl sulfate reagent, followed by neutralization of the precursor acids using methanolic zinc acetate. The ionomers were characterized using X-ray fluorescence spectroscopy, Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR), dynamic mechanical analysis (DMA), and also by the evaluation of mechanical properties. The FTIR studies of the ionomer reveal that the sulfonate groups are attached to the benzene ring. The NMR spectra give credence to this observation. Results of DMA show an ionic transition (Ti) in addition to glass-rubber transition (Tg). Incorporation of ionic groups results in improved mechanical properties as well as retention of properties after three cycles of processing. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2294-2300, 2002
Butadiene - styrene and styrene butadiene rubber for the copolymer, referred to as styrene butadiene rubber, code-named SBR, was one of the first general-purpose industrial synthetic rubber. SBR has good performance, and its processing performance, mechanical properties and the system of rubber products in the use of performance closer to the natural rubber and wear resistance, heat aging performance was also better than natural rubber. SBR with natural rubber, such as butadiene rubber and rubber, rubber is a major general, widely used in the manufacture of tires, hose, belt, shoes and a variety of industrial rubber products. Its total consumption of synthetic rubber in the first place.
According to the polymerization of styrene-butadiene rubber in different ways, into milk-and styrene butadiene rubber SSBR. Milk polybutadiene - referred to as the Milk-styrene rubber SBR, code-named E-SBR. According to the polymerization temperature, sub-milk-styrene-butadiene rubber Calorimetry (50 ℃) and cold milk law-SBR (5 ℃), also known as the former "hot rubber" (hot rubber) or high-temperature SBR; the latter said "Cold rubber" (Cold rubber) or low-temperature SBR. Styrene butadiene rubber in the general level of 23.5 ± 1%; content as high as 40% over that of the high-styrene rubber (high styrene rubber); styrene combined 70-90% for high-styrene resin; individual has combined styrene Low. In addition to the pure styrene-butadiene rubber, there are oil-filled styrene-butadiene rubber and oil-filled breast-milk-derived carbon black mother of styrene-butadiene rubber mixing.
This shows that the high-styrene rubber SBR is a unique species, from latex and styrene butadiene copolymer latex obtained, and then washed by the pool, squeezing dehydration, dry derived products.
High styrene rubber bonding with each other for easy rubber particle of white, non-toxic, odorless, flammable. With low impurity content, quality and stability characteristics. Because of its composition with a high level of styrene to wear the products, anti-aging properties, hardness, steel, tear strength and stretch will be substantial increase in intensity.
As a result of containing double bonds, the sulfide sulfur can be used, after the curing of leather with similar properties can be obtained bright color, high tensile strength of the product, its heat-resistant tear-resistant and the resistant Flexibacter good name, Under hard with high flexibility.
High styrene excellent rheological properties, processing performance, rolling-out, the shrinkage of small, a clear pattern, pieces of plastic on the surface smooth and shiny good.
High styrene rubber is widely used in shoe-making industry to make shoes at the end of shoe foam, sponge soles, heel, imitation leather uppers, and so on. Because of their superior electrical properties, but also used as electrical insulation materials. Can also be used to the hard-rubber plate, rubber floor of the reinforcement agent, and their general usage in the 30% -50%. High styrene rubber by polymerization of styrene monomer form. With the other two vinyl and rubber. |
