By P. Deepalekshmi, P. M. Visakh, Aji. P. Mathew, Arup K. Chandra (auth.), P. M. Visakh, Sabu Thomas, Arup K. Chandra, Aji. P. Mathew (eds.)
This is the 1st quantity of a two-volume paintings which summarizes in an edited structure and in a reasonably entire demeanour the various fresh technical examine accomplishments within the region of Elastomers. “Advances in Elastomers” discusses a few of the makes an attempt stated on fixing those difficulties from the viewpoint of the chemistry and the constitution of elastomers, highlighting the drawbacks and merits of every approach. It summarize the significance of elastomers and their multiphase platforms in human existence and undefined, and covers all of the themes with regards to contemporary advances in elastomers, their blends, IPNs, composites and nanocomposites.
This first quantity specializes in advances at the blends and interpenetrating networks (IPNs) of elastomers.
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Extra resources for Advances in Elastomers I: Blends and Interpenetrating Networks
2 Halogen and Nitrile Substituted Elastomers Polychloroprene (CR) was one of the first commercially successful synthetic rubbers with an annual consumption of about 3,00,000 tons worldwide (excluding former Soviet Union and PR of China). It is a chlorinated rubber material, which 24 R. A. Shanks and I. Kong Fig. 5 4 1 2 1 4 4 3 was developed in 1932 by Carothers, Collins, and co-workers using emulsion polymerization techniques. In the same year DuPont began marketing the polymer first under the trade name Duprene and since 1938 as Neoprene.
The original name was Buna N and later changed to Perbunan in 1938. The physical and chemical properties of nitrile rubber vary depending on the composition of acrylonitrile, which typically ranges from 15 to 50 %. With increasing acrylonitrile content the rubber shows higher strength, greater resistance to swelling by hydrocarbon oils, and lower permeability to gases. However, the 26 R. A. Shanks and I. Kong higher glass transition temperature makes the rubber becomes less flexible at lower temperatures.
A. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. a. 1,E ? a. a. 1,E ? 15 1,E ? a. 1,E ? a. 1,E ? a. a. 1,E ? a. 6 Electrical Resistivity (q/ohmÁ cm) 30 R. A. Shanks and I. 5 Fluorocarbon Elastomers Fluorocarbon elastomers (FKM) are synthetic copolymers derived by replacing some or all of the hydrogen atoms in hydrocarbons by fluorine atoms. They are typically used when other elastomers fail in hostile environments. The two main important properties of this class of elastomers are chemical resistance and heat resistance.