نتایج جستجو برای: silicones
تعداد نتایج: 402 فیلتر نتایج به سال:
Most analytical methods commonly used for organic materials also apply to silicones. Extensive reviews have been published about the different analytical techniques that are applicable for detecting and characterizing silicones [1]. The focus here will be on methods as they relate to typical application problems; some of these are commonly used methods. Others, such as elemental analysis and th...
Silicones are special reagents that impart desired surface properties such as softness, bounciness and antiwrinkle properties to fabrics and related materials. Although these finishing processes have been practiced routinely, very little is known about the mechanisms involved in modification so that they could be improved. The current study was undertaken to develop basic understanding of the m...
Silicones are typically cured at room temperature by means of metal catalyst such as tin or platinum. When networks formed, the becomes unrecoverable, which is economic well environmental concern. Very few methods for producing catalyst-free room-temperature-vulcanized (RTV) silicones exist and require conditions unavailable in industrial settings. Through study organic polysilazane (PSz) react...
Silicones are used in the plastics industry as additives for improving the processing and surface properties of plastics, as well as the rubber phase in a novel family of thermoplastic vulcanizate (TPV) materials. As additives, silicones, and in particular polydimethylsiloxane (PDMS), are used to improve mold filling, surface appearance, mold release, surface lubricity and wear resistance. As t...
The objective of this article is to give the curious reader a short but scientific overview about the ways silicones are prepared, their key properties and how these properties allow silicones to perform in many different applications. Introduction By analogy with ketones, the name “silicone” was given in 1901 by Kipping to describe new compounds of the brut formula R2SiO. These were rapidly id...
Table I – Distribution of the 358 dosage forms identified to contain silicones, per physical type of silicone used (4) published by srl Via Cesare da Sesto, 1
Before 1943, planes could maintain high altitudes for only a few minutes before ignition losses due to moisture condensing in the engines. A simple thickened PDMS grease was the solution and an early example of the excellent dielectric properties of silicones. This application also illustrates key properties of silicones in the electronic industries like hydrophobicity and high dielectric break...
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