Elastomers technology

The siloxane polymer usually has a rather high molecular weight, and may have reactive ends for end-linking or vinyl side chains for peroxide curing, as described in chapter 7. 

The preferred reinforcing filler is high surface area silica, particularly that made by the fume process, which gives the greatest reinforcement, and, because of its high purity, yields excellent electrical insulation properties. Silicas obtained from aqueous solutions impart moderately good reinforcement but, because of the presence of water on the 

PDMS has also been cured using UV (ultraviolet) radiation, gamma or electron beams, ° and laser irradiation. Thermal cures are also available. i 2-iss Iso relevant here are physically cross-linked fluo-rosilicone elastomers obtained by self-assembly and template polycondensation of tailored building blocks.  

There has been some interest in cross-linking in solution, since the network chains in the subsequently dried elastomer are super compressed. These materials can have some unusual properties, including unusually high extensibility.  

Mechanical property measurements are the most common way to characterize cross linking. - Different curing methods can give different mechanical properties. New characterization methods are being developed, including fluorescence, small-angle neutron scattering, and multiple quantum H NMR. 

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Because of the different vulcanization chemistry involved in each commercial ACM, a vulcanization system specific to the cure site present has to be adopted. Many cure systems for labile chlorine containing ACM have been proposed (45). Among these the alkali metal carboxylate—sulfur cure system, or soap—sulfur as it is called in the United States, became the mainstay of acryflc elastomer technology in the early 1960s (46), and continues to be widely used. 

The development of the mechanical seal advanced in parallel with elastomer technology. Mechanical seals using o-rings and other elastomer forms, benefited with improved shelf-life, maximum and minimum temperature limits, better chemical resistance, and higher pressure ratings. 

School R.J., Markets for thermoplastic elastomers. Elastomer Technology Handbook (Chremisinoff N.P., ed.), CRC Press, Boca Raton, FL, 1993. 

Actuators based on dielectric elastomer technology operate on a simple principle as shown in Figure 10.4. When an electric field is apphed to the electrodes, positive charges appear on one... 

Mangaraj, D. Rubber Chem. Technol. 75(3), 2002, 365 Mangaraj, D. Rubber Blends. Chapter 3, Elastomer Technology, Special Topics (eds. K. Baranwal and H. Stephens), Rubber Division, American Chemical Society, 2003. 

W.C. Endstra and C.T.J. Wressmann, Peroxide Crosslinking of EPDM Rubbers, in Elastomer Technology Handbook, N.P. Cheremisinoff and Pn. Cheremisinoff, Eds., CRC Press, New Jersey, 1993. 

Chapter 37 Recent Advances in Eco-Eriendly Elastomer Technology.1021... 

Department of Elastomer Technology and Engineering University of Twente Enschede, the Netherlands... 

University of Twente, Faculty of Engineering Technology, Department of Elastomer Technology and Engineering (ETE), 7500 AE Enschede, The Netherlands e-mail j.w.m.noordermeer utwente.nl W. van Ooij... 

Endstra WC, Wreesmann CTJ (1993) Peroxide crosslinking of EPDM rubbers. In Cheremi-sinoff NP (ed) Elastomer technology handbook. CRC, Boca Raton... 

M.R. Krejsa and J.L. Koenig, Elastomer Technology Handbook, CRC Press, 1993, Chapter 11. 

The development of silicone elastomer technology has enabled synthetic rubber plants to obtain very convenient and practical rubber compounds. 

Prior to the introduction of the LPS process, the low consistency liquid silicone rubber was not considered for use in fabricated parts because of the inadequate physical properties. Recent advancements in the low consistency silicone elastomer technology, however, have led to the development of high strength material. 

Elastomer technology is useful in medicine. Muscles and arteries contain giant molecules, called elastin, that make muscles and arteries contract. Doctors can give artificial arteries to people with severe heart problems or other diseases. Unfortunately these artificial arteries do not last long enough. Can they be replaced by a new type of elastomer ... 

Dr. Judit Puskas holds Canada s first Industrial Research Chair in Elastomer Technology at the University of Western Ontario in London, Ontario. She thinks that an elastomer called polyisobutylene, along with some of its derivatives, looks promising. In the future, it may be used to make better artificial arteries. It may also be useful for other implants, since it can imitate the rubber-like properties of elastin. 

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