By Alan N. Gent
This booklet offers the foundations of rubber technology and technology: what rubber is, the way it behaves, and the way to layout engineering elements with rubber. It introduces the principles on which profitable use of rubber relies and gives suggestions to the questions engineers in rubber processing face on a daily basis. How is an elastomer chosen and a formulation constructed? Why is rubber hugely elastic and comparatively powerful? How is the stiffness and strength of a product predicted? How is high caliber and sturdiness assured? The authors describe present practices in rubber engineering. on the finish of every bankruptcy, there are pattern questions and difficulties (with strategies) that gauge mastery of the cloth.
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The techniques to layout procedure crops defined during this ebook result in technique designs which require 30-40% much less capital than traditional. The booklet is exclusive because it is the 1st complete paintings addressing either the whole approach layout and operational strategy. Technological advancements over the past decade made the layout of truly aggressive tactics attainable.
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Chain breaking antioxidants are aromatic and contain labile protons, which are “donated” to the peroxy radicals. This occurs readily because the resulting antioxidant radical is highly resonance stabilized. com by Universitätsbibliothek Bayreuth on February 21, 2012 For personal use only. 1. It is common to use accelerated aging tests to determine the resistance of a vulcanizate to oxidation. However, caution should be used in attempting to infer long-term aging performance from short-term tests carried out at temperatures much higher than service temperature.
Com by Universitätsbibliothek Bayreuth on February 21, 2012 For personal use only. Crosslinking with sulfur alone is quite inefficient and requires curing times of several hours. For every crosslink, 40–55 sulfur atoms are combined with the rubber. The structure contains polysulfide linkages, dangling sulfur fragments, and cyclic sulfides. Much of the sulfur is not involved in crosslinks between chains. Moreover, such networks are unstable and have poor aging resistance. In order to increase the rate and efficiency of sulfur crosslinking, accelerators are normally added.
The most common silicone elastomer is polydimethyl siloxane (MQ) with methyl substituent groups on the polymer chain. It has a Tg of –127 °C. Other members of the silicone rubber family have vinyl and phenyl substituent groups in addition to methyl, as denoted by the additional letters in their reference letters. Silicone rubbers have both excellent high temperature resistance and low temperature flexibility. In addition, they possess good biocompatibility and thus are used in implants and prostheses.
Engineering with Rubber: How to Design Rubber Components by Alan N. Gent