TREATISE ON EPDM

2012 ◽  
Vol 85 (3) ◽  
pp. 327-349 ◽  
Author(s):  
P. S. Ravishankar

ABSTRACT EPDM is the designation given for a saturated polymer chain of the polymethylene type, consisting of ethylene, propylene, and diene. It has been and continues to be one of the most widely used and rapidly growing synthetic rubbers. Technology development has been driven by novel catalysts and processes that have expanded the range of products while delivering improvements in manufacturing such as energy efficiency and environmental footprint. A broad overview of the EPDM process and product technology is presented with focus on more recent developments. The range of topics includes polymer chemistry and physics, characterization, applications, and the manufacturing process. Technology platforms based on both the Ziegler–Natta catalysts and metallocene catalysts are compared and contrasted.

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4466
Author(s):  
Pablo Domínguez de María

Nitriles comprise a broad group of chemicals that are currently being industrially produced and used in fine chemicals and pharmaceuticals, as well as in bulk applications, polymer chemistry, solvents, etc. Aldoxime dehydratases catalyze the cyanide-free synthesis of nitriles starting from aldoximes under mild conditions, holding potential to become sustainable alternatives for industrial processes. Different aldoxime dehydratases accept a broad range of aldoximes with impressive high substrate loadings of up to >1 Kg L−1 and can efficiently catalyze the reaction in aqueous media as well as in non-aqueous systems, such as organic solvents and solvent-free (neat substrates). This paper provides an overview of the recent developments in this field with emphasis on strategies that may be of relevance for industry and sustainability. When possible, potential links to biorefineries and to the use of biogenic raw materials are discussed.


MRS Advances ◽  
2018 ◽  
Vol 3 (20) ◽  
pp. 1059-1064 ◽  
Author(s):  
Eric R. Vance ◽  
Dorji T. Chavara ◽  
Daniel J. Gregg

Abstract:Since the year 2000, Synroc has evolved from the titanate full-ceramic waste forms developed in the late 1970s to a hot isostatic pressing (HIP) technology platform that can be applied to produce glass, glass–ceramic, and ceramic waste forms and where there are distinct advantages over vitrification in terms of, for example, waste loading and suppressing volatile losses. This paper describes recent progress on waste form development for intermediate-level wastes from 99Mo production at ANSTO, spent nuclear fuel, fluoride pyroprocessing wastes and 129I. The microstructures and aqueous dissolution results are presented where applicable. This paper provides perspective on Synroc waste forms and recent process technology development in the nuclear waste management industry.


Author(s):  
Ioana Armiano

Recent developments in process interaction solutions are helping companies and educational institutions to reduce training costs, enhance visualization, and increase communication. Service personnel can make more informed decisions by allowing a broad range of employees to access data instantly. New 3D interactive technologies incorporated into training applications and learning environments together with the introduction of the one projector 3D solution is rapidly changing the landscape for education. Over the last 10 years, virtual reality applications have been applied in various industries; medical, aircraft computer modeling, training simulations for offshore drilling platforms, product configuration, and 3D visualization solutions for education and R&D. This paper examines emergent visualization technologies, their influence on market growth and on new perceptions of learning and teaching. It describes the interrelationship between technology development, technology providers, product launches, R&D, and the motivation to learn and teach new skills. The paper incorporates social, technological, and global markets growth drives, describing the pull and drag synergy between these forces.


2007 ◽  
Vol 7 (1) ◽  
pp. 181-192 ◽  
Author(s):  
Jiaping Yang

This paper reviews the recent developments in the area of MEMS-based probe recording technology. Various state-of-the-art scanning probe microscope (SPM) based techniques are briefly introduced, followed by the description of system approaches of MEMS-based probe recording technology and the basic MEMS-based actuation mechanism. Subsequently, current research status in developing MEMS-based probe recording technology with emphasis on storage architecture, MEMS access systems, probe recording mechanisms, and media for terabit per square inch recording density, is reviewed. Lastly, potential research topics and prospects for MEMS-based probe recording technology development are discussed.


10.12737/302 ◽  
2013 ◽  
Vol 2 (1) ◽  
pp. 0-0 ◽  
Author(s):  
Гарнов ◽  
Andrey Garnov ◽  
Голубин

In the article considers the experience of the European Union in the formation of «the technological platforms» — communication and coordination tool for association efforts of the government, business and science in determining the strategic «challenges», the development of programs for Advanced Studies, the ways of their realization and introduction of results. Describes the author’s opinion on some issues forming the section «Re-processing of waste production and consumption» in the approved Russian technological platform, «Ecological Technology Development».


2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Abbi Hamed ◽  
Sai Chun Tang ◽  
Hongliang Ren ◽  
Alex Squires ◽  
Chris Payne ◽  
...  

The developments of medical practices and medical technologies have always progressed concurrently. The relatively recent developments in endoscopic technologies have allowed the realization of the “minimally invasive” form of surgeries. The advancements in robotics facilitate precise surgeries that are often integrated with medical image guidance capability. This in turn has driven the further development of technology to compensate for the unique complexities engendered by this new format and to improve the performance and broaden the scope of the procedures that can be performed. Medical robotics has been a central component of this development due to the highly suitable characteristics that a robotic system can purport, including highly optimizable mechanical conformation and the ability to program assistive functions in medical robots for surgeons to perform safe and accurate minimally invasive surgeries. In addition, combining the robot-assisted interventions with touch-sensing and medical imaging technologies can greatly improve the available information and thus help to ensure that minimally invasive surgeries continue to gain popularity and stay at the focus of modern medical technology development. This paper presents a state-of-the-art review of robotic systems for minimally invasive and noninvasive surgeries, precise surgeries, diagnoses, and their corresponding technologies.


2004 ◽  
Author(s):  
Harvey Tananbaum ◽  
Nicholas E. White ◽  
Jay A. Bookbinder ◽  
Robert Petre ◽  
Kimberly Weaver

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