Liu J.,University of Central Florida |
Liu J.,NuSil Technology LLC |
Moo-Young J.,North Carolina State University |
McInnis M.,University of Central Florida |
And 2 more authors.
Macromolecules | Year: 2014
The assembling behavior of four thiophene-containing conjugated polymers, regioregular poly(3-hexythiophene) (rr-P3HT), poly(3,3-didodecylquaterthiophene) (PQT-12), poly(2,5-bis(3- tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT-14), and poly(2,5-bis(3-tetradecylthiophen-2-yl)thiophen-2-yl)thiophen-2- ylthiazolo[5,4-d]thiazole) (PTzQT-14), on carbon nanotubes was investigated through microscopic studies of nanowire formation and theoretical simulation. It is found that polymer backbone rigidity and shape influence the attachment mode on carbon nanotubes. rr-P3HT and PQT-12 have a zigzag backbone structure that allows a thermodynamically stable coaxial attachment on CNTs, providing an ordered growth front for the nanowire formation. In contrast, fused rings in PTzQT-14 and PBTTT-14 create a stair-step like backbone structure that causes a kinetically controlled wrapping conformation on CNTs, generating a twisted growth front that hinders the nanowire formation. In addition, the rigidity of polymer backbone influences the wrapping mode. Polymers with more flexible backbones (i.e., PBTTT-14) would take a dense irregular wrapping mode on CNTs. The CNT diameter plays an important role in the nanowire formation when CPs attach to the CNT in the wrapping mode. Larger nanotubes with smaller surface curvature provides a less twisted polymer growth front, allowing the formation of CPNWs. © 2014 American Chemical Society.
Thomaier R.,NuSil Technology LLC
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011
Messy liquid adhesives, short work times, long cure times, difficult clean-up of stray adhesive- all of these are associated with liquid adhesives for bonding solar cells. Current adhesion methods have been in place since the '70s: mix a two-part liquid silicone adhesive, coat a portion of adhesive onto a section of substrate, place the cells in a vacuum bag and wait for the adhesive to cure. Alternatively, one can use a fairly complicated robotic procedure to apply adhesive then fix a cell down and, again, wait for the adhesive to cure. Some difficulties that need to be overcome include balancing the amount adhesive to spread out with the available worktime in order to get all the cells onto the substrate with good adhesion; controlling the bondline; ensuring that the adhesive cures correctly after application; and, finally, if there is any re-work, removing the part from the adhesive without damaging everything around it. © 2011 SPIE.
Lindberg M.,NuSil Technology LLC
International SAMPE Technical Conference | Year: 2011
Engineers and material scientists are constantly looking for a polymeric adhesive that can perform in a broad operating temperature range, maintain chemical stability and offer unique mechanical properties. The dynamic attributes of silicone adhesives, sealants, coatings and encapsulants provide design engineers with a variety of solutions to the complex challenges they face. The advantages of silicone lie in the chemistry of the polymer chain, which can be modified to achieve desired mechanical properties. The different functional groups (R-substituent groups) bonded to the siloxane backbone can affect properties such as hydrocarbon resistance, optical clarity and elasticity. Another benefit of silicone is the ability to incorporate functional fillers that impart unique properties such as electrical conductivity, thermal conductivity, lower density and increased physical properties. These advanced silicones can also be designed as controlled volatility (CV) materials to handle the rigorous demands of aerospace requirements. Choosing a silicone for your application involves detailed planning and collaboration with a silicone supplier. This article outlines several types of silicones, how they can be modified and customized to suit a specific application, and how to select the appropriate silicone adhesive.
Reilly B.,NuSil Technology LLC |
Freedman J.,NuSil Technology LLC
Rubber World | Year: 2015
Liquid silicone rubbers (LSRs) are a family of tough and versatile silicones. They can be molded into everything from o-rings to intricate geometries with thin walls, and remain elastic without tearing. In harsh environments, silicones are also commonly used since they have excellent thermal stability at high and low temperatures, and their low modulus provides stress relief during thermal cycling. LSRs are typically comprised of 75% linear silicone polymers, 23% fumed silica, and the remainder consisting of a combination of curing additives such as hydride crosslinker and inhibitors. The cured mechanical properties of an LSR are dependent on many factors due to the molecular architecture formed by the molecular weight of the polymers and their interaction with the fumed silica filler. Since the majority of LSRs use a platinum catalyzed addition cure system, it is important to use compatible materials when processing the silicone to ensure it fully cures and subsequently achieves maximum properties and best performance.
NuSil Technology LLC | Date: 2015-03-27
Dispersions of an encapsulated material by a polymeric membrane in a medium are disclosed. Such dispersions are useful in topical compositions including cosmetics and sunscreens.
NuSil Technology LLC | Date: 2016-06-17
Compositions for forming a silicone elastomer and the silicone elastomers thereby which have improved characteristics and which can be used for medical devices are disclosed. The composition for forming a silicone elastomer can include (A) an organopolysiloxane having silicon-bonded alkenyl groups; (B) an organohydrogensiloxane having an average of two or more silicon-bonded hydrogen atoms in the molecule; (C) an inorganic filler; and (D) a filler treatment agent which includes an alkenyl-containing group, e.g., an alkenyl-containing organosilane or organosilazane.
Nusil Technology LLC | Date: 2012-11-28
Chemical products based on organosilicon compounds for use in the manufacture of products in the cosmetics industry.
Nusil Technology LLC | Date: 2016-12-15
Silicones, silicone polymers, silicone amines and silicone emulsions for use in the manufacture of pharmaceutical preparations, drug delivery agents, medical devices, cosmetics, skin care products, personal care products, healthcare products, electronic products, optoelectronic products, commercial products, industrial products, aerospace products, defense products, plastics, rubbers, coatings, fillers, adhesives, lubricants and sealants. Contract manufacturing of silicone products in the fields of pharmaceuticals, drug delivery agents, medical devices, cosmetics, skin care products, personal care products, healthcare products, electronic products, optoelectronic products, commercial products, industrial products, aerospace products, defense products, plastics, rubbers, coatings, fillers, adhesives, lubricants and sealants. Design for others of silicon based products, namely, silicone amines and emulsions thereof used in the formulation of personal care, textile, household, industrial, institutional and automotive products.
Burkett B.,NuSil Technology LLC
Annual Forum Proceedings - AHS International | Year: 2012
Ice buildup on aircraft surfaces is dangerous and can cause serious problems. The lifting surfaces of helicopters and other vertical lift vehicles are typically under a lot of stress and can, therefore, benefit greatly from coatings that improve the release of ice. In events of ice buildup, silicone's ability to remain elastic at low temperatures has proven extremely valuable. Results from instances of the Zero Degree Cone Test, which measures the force required to push a coated pin out of a frozen ice block, show that silicone promotes very low ice adhesion compared to other materials. Further characterization of silicone's de-icing qualities in an experimental test by NuSil Technology adds support for this material as a high-performing, highly competitive ice phobic coating. This test evaluated specially formulated silicone ice phobic coatings by quantifying the adhesion strength of ice to coated aluminum panels using an ice adhesion fixture and MTS machine. Copyright 2012 by the American Helicopter Society International, Inc. All rights reserved.
News Article | December 21, 2016
The report "Liquid Silicone Rubber Market by Grade (Industrial, Medical, Food), Application (Automotive, Medical (Implants, Medical Devices), Electrical & Electronics (Insulation, and Electrical & Optical), Consumer Goods), Region - Global Forecast to 2026", published by MarketsandMarkets, the global market is projected to reach USD 3.82 Billion by 2026, at a CAGR of 8.3%, during the forecast period, 2016 to 2026. Browse 80 market data Tables and 40 Figures spread through 145 Pages and in-depth TOC on "Liquid Silicone Rubber Market" http://www.marketsandmarkets.com/Market-Reports/liquid-silicone-rubber-market-75386243.html Early buyers will receive 10% customization on this report. LSRs have many beneficial properties such as, having heat resistance, being chemically inert, biocompatible, and easy to mold. Thus these are used in many applications including, automotive, medical, electrical & electronics, and consumer goods. The growing aging population is leading to the high growth in demand for LSR products in the healthcare industry, and the increasing demand for LSR from the electrical & electronics industry is driving the LSR market. This is resulting in an increase in the number of new product launches and expansions by companies. Medical: The fastest growing application segment of the LSR market The medical application is growing due to the increasing demand for LSR products in the healthcare industry. The increasing aging population, worldwide, along with the increasing awareness about health concerns is driving the medical applications of LSR. Medical-grade LSRs are used to manufacture various medical devices, accessories, and fittings, as these are temperature-resistant, and are easy to sterilize. Medical grade LSR: The fastest growing grade in the LSR market The medical grade LSR is the fastest growing grade of LSR. Since the use of medical grade LSRs requires the compliance of many specifications and regulations for use in medical products, they are costlier than the other grades of LSRs. Thus this grade is expected to be the largest in terms of value, during the forecast period. Companies such as, Dow Corning (U.S.), and Wacker Chemie AG (Germany) are the leading companies in the manufacture of medical grade LSRs. North America is the largest market for LSR. The market in North America is growing due to the increasing demand for LSRs in various applications including, automotive, medical, electrical & electronics, consumer goods, and others. The medical application has the largest share in the North American LSR market. This application is driven by the demand for LSR based medical devices, medical components, and implants, especially in the U.S. The major players in the LSR Market such as, Dow Corning (U.S.), Momentive Performance Materials Inc. (U.S.), NuSil Technology LLC (U.S.), Simtec Silicone Parts, LLC (U.S.), and Stockwell Elastomerics Inc. (U.S) are U.S.-based companies and supply their products across the globe. The blowing agents have a few numbers of global players competing for market share. These companies are actively adopting various strategies such as partnerships/collaborations/agreements, new product developments, merger & acquisitions, and expansion projects globally to increase their market share. Major players such as Arkema SA (France), Honeywell International Inc. (U.S.), Solvay SA (Belgium), Exxon Mobil Corporation (U.S.), Linde AG (Germany), and others have adopted various organic and inorganic developmental strategies. Medical Grade Silicone Market by Product Form (Gels, Adhesives, Medical Coatings & Fluids, Silicone Elastomers), Application (Prosthetics & Orthopedic, Medical Tapes, Medical Electronics & Devices, Medical Tubes, Catheters) and by Region - Global Forecast to 2021 http://www.marketsandmarkets.com/Market-Reports/medical-grade-silicone-market-36328567.html Silicone Elastomers Market by Type (High Temperature Vulcanized, Room Temperature Vulcanized, and Liquid Silicone Rubber), Process (Extrusion, Liquid Injection Molding, Injection Molding, and Compression Molding), End-use Industry - Global Forecast to 2021 http://www.marketsandmarkets.com/Market-Reports/silicone-elastomers-market-6310524.html MarketsandMarkets is the largest market research firm worldwide in terms of annually published premium market research reports. Serving 1700 global fortune enterprises with more than 1200 premium studies in a year, M&M is catering to a multitude of clients across 8 different industrial verticals. 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