Silicone
... also known as polymer derived ceramics. Polysiloxanes terminated with functional ligands such as vinyl, mercapto or acrylate ... n Si(CH3)2(CH3COO)2 + n H2O → [Si(CH3)2O]n + 2n CH3COOH Branches or crosslinks in the polymer chain can be introduced by using ... A silicone polymer can be suspended in water by using stabilizing surfactants. This allows water-based formulations to be used ... A silicone or polysiloxane is a polymer made up of siloxane (−R2Si−O−SiR2−, where R = organic group). They are typically ...
1,1-Diphenylethylene
Meditation by 1,1-Diphenylethylene generates low molecular weight polymer by a termination reaction. Dibenzofulvene is an ... 1,1-Diphenylethylene mediates the radical polymerization of methyl acrylate or styrene. ... Gives a π-Stacked Polymer by Anionic, Free-Radical, and Cationic Catalysts". J. Am. Chem. Soc. 123 (37): 9182-9183. doi:10.1021 ...
Copper-based reversible-deactivation radical polymerization
"Ultrafast Synthesis of Ultrahigh Molar Mass Polymers by Metal-Catalyzed Living Radical Polymerization of Acrylates, ... Polymer. 51 (77): 14435-14438. doi:10.1016/j.polymer.2023.126055. S2CID 258978113. Miao, Yongpeng; lyu, Jing; Yong, Haiyang; ... End of controversy?". Polymer Chemistry. 5 (15): 4409. doi:10.1039/C4PY00149D. Anastasaki, Athina; Nikolaou, Vasiliki; ... and the discussion of the mechanisms has been a very striking episode in the field of polymer science. In the case of RDRP ...
Virgil Percec
"Ultrafast Synthesis of Ultrahigh Molar Mass Polymers by Metal-Catalyzed Living Radical Polymerization of Acrylates, ... He has served as the Editor of Journal of Polymer Science: Part A: Polymer Chemistry, Advances in Polymer Science and Book ... 2004, American Chemical Society Award in Polymer Chemistry. 2002, Polymer Technology Netherland (PTN) Award from the ... Isomers of polyphenylacetylene". Journal of Polymer Science: Polymer Chemistry Edition. 15 (10): 2497-2509. Bibcode:1977JPoSA.. ...
Self-cleaning surfaces
Suh and Jon used molds made from poly(urethane acrylate) (PUA). These were placed on spin coated, water-soluble polymer, ... Imprint nanolithography also utilizes templates, pressing a hard mold into a polymer above the polymer glass transition ... Templating utilizes a mold to add nanostructure to a polymer. Molds can come from a variety of sources including natural ... One study used capillarity to fill PDMS molds with PUA, first partially curing the polymer resin with UV light. After ...
Timeline of United States inventions (1890-1945)
To be called acrylic in the United States, the polymer must contain at least 85% acrylonitrile monomer. Typical comonomers are ... vinyl acetate or methyl acrylate. The Dupont Corporation invented the first acrylic fibers in 1941 and trademarked them under ... Medical gloves are made of different polymers including latex, nitrile rubber, vinyl and neoprene; they come unpowdered, or ... 1941 Acrylic fiber Acrylic fibers are synthetic fibers made from a polymer Polyacrylonitrile with an average molecular weight ...
Thermoresponsive polymers in chromatography
To address the shortcomings of the previous methods, Kobayashi's group grafted acrylic acid (anionic acrylate under neutral ... Thermoresponsive polymers can be used as stationary phase in liquid chromatography. Here, the polarity of the stationary phase ... This results in a formation of a polymer-enzyme conjugate which can be reversibly precipitated and dissolved by changing the ... The scope of this study was limited to isothermal conditions and attaching polymer chains to glass beads. The results, however ...
Acrylic fiber
The polymer is formed by free-radical polymerization in aqueous suspension. The fiber is produced by dissolving the polymer in ... Methyl acrylate (6%) and acrylonitrile were polymerised in a 50% solution of sodium thiocyanate to produce a dope ready for ... For a fiber to be called "acrylic" in the US, the polymer must contain at least 85% acrylonitrile monomer. Typical comonomers ... Acrylic fibers are synthetic fibers made from a polymer (polyacrylonitrile) with an average molecular weight of ~100,000, about ...
3D printing processes
... exposed liquid polymer hardens through cross-linking driven by the addition reaction of carbon carbon double bonds in acrylates ... The liquid polymer is then drained from the vat, leaving the solid model. The EnvisionTEC Perfactory is an example of a DLP ... Each method has its own advantages and drawbacks, which is why some companies offer a choice of powder and polymer for the ... In this process a vat of liquid polymer is exposed to controlled lighting (like a laser or a digital light projector) under ...
Methyl acrylate
Polymer (in German), vol. 43, no. 18, pp. 4841-4850, doi:10.1016/S0032-3861(02)00330-0 WO 2010136696, Paul, Jean-Michel; ... Methyl acrylate is after butyl acrylate and ethyl acrylate the third most important acrylic ester with a worldwide annual ... Methyl acrylate is the precursor to fibers that are woven to make carpets. Methyl acrylate reacts catalysed by Lewis bases in a ... Methyl acrylate can be prepared by debromination of methyl 2,3-dibromopropanoate with zinc. Methyl acrylate is formed in good ...
Polymer-based battery
6-tetramethylpiperidinyloxy-4-yl meth-acrylate). In 2006, Brown University announced a technology based on polypyrrole. In 2007 ... Polymer-based batteries, including metal/polymer electrode combinations, should be distinguished from metal-polymer batteries, ... or the amorphous state of polymers. Electrochemical performance of polymer electrodes is affected by polymer size, morphology, ... During discharging, the polymer is reduced while the metal is oxidized to its cation. Conductive polymers can be n-doped or p- ...
Photochromism
As a result, they switch most rapidly in solution and slowest in the rigid environment like a polymer lens. In 2005 it was ... reported that attaching flexible polymers with low glass transition temperature (for example siloxanes or polybutyl acrylate) ... Incorporation of the dyes into a polymer matrix, adding a stabilizer, or providing a barrier to oxygen and chemicals by other ... Some spirooxazines with siloxane polymers attached switch at near solution-like speeds even though they are in a rigid lens ...
Polymer backbone
... and acrylates (R = CO2R'). Other major classes of organic polymers are polyesters and polyamides. They have respectively -C(O)- ... In polymer science, the polymer chain or simply backbone of a polymer is the main chain of a polymer. Polymers are often ... Common synthetic polymers have main chains composed of carbon, i.e. C-C-C-C.... Examples include polyolefins such as ... Like almost all polymers, protein fold and twist, forming into the secondary structure, which is rigidified by hydrogen bonding ...
Bone grafting
Polymers such as some microporous grades of PMMA and various other acrylates (such as polyhydroxylethylmethacrylate aka PHEMA ...
Thanun Pyriadi
... and curing of N-substituted citraconimidyl acrylate, Journal of Polymer Science Part A: Polymer Chemistry, Volume 37, Issue 4, ... Pyriadi, Thanun M. (1999). "Synthesis, polymerization, and curing ofN-substituted citraconimidyl acrylate". Journal of Polymer ... Journal of Polymer Science Part A: Polymer Chemistry. 31 (13): 3199-3203. Bibcode:1993JPoSA..31.3199P. doi:10.1002/pola. ... Journal of Polymer Science Part A: Polymer Chemistry, Volume 18, Issue 8, pages 2535-2541, August 1980 Synthesis, ...
Atom transfer radical polymerization
... acrylates, (meth)acrylamides, and acrylonitrile. ATRP is successful at leading to polymers of high number average molecular ... The use of multi-functional initiators facilitates the synthesis of lower-arm star polymers and telechelic polymers. External ... The number of polymer chains is determined by the number of initiators. Each growing chain has the same probability to ... For example, initiators with multiple alkyl halide groups on a single core can lead to a star-like polymer shape. Furthermore, ...
SABIC
Standard & Poor's and Fitch Ratings claimed SABIC to be the world's largest producer of polymers and the Persian Gulf region's ... acrylonitrile styrene acrylate / acrylonitrile butadiene styrene blend) Valox (polybutylene terephthalate) Verton (long ... SABIC was founded in 1976 by royal decree to convert oil by-products into useful chemicals, polymers, and fertilizers. The ... SABIC Europe, SABIC's European subsidiary, produces over 2 million tonnes of polymers and over 5 million tonnes of basic ...
Bio-ink
Alginate has become the most widely used natural polymer for bioprinting and is most likely the most common material of choice ... A more permanent pluronic-based network can be formed through the modification of the pluronic chain with acrylate groups that ... Polyethylene glycol (PEG) is a synthetic polymer synthesized by ethylene oxide polymerization. It is a favorable synthetic ...
Drug-eluting implant
... while non-degradable polymer materials include silicones commonly used in plastic surgery, urethanes and acrylates, and are ... Polymers can be used to create monolithic drug delivery systems in which a drug is released in a rate-controlled polymer matrix ... Polymers and polymer networks are among the most widely used materials in drug eluting implants. These implants are classified ... Common degradable polymer materials used in drug eluting implants include poly e-caprolactone (PCL), polylactic-co-glycolic ...
Nyfors
The polymer comprising the recoat is usually similar in composition to the original fiber polymer coating. Nyfors optical fiber ... recoaters are designed to restore the primary coating on spliced optical fibers with acrylate coatings. Due to the mould design ...
Plasma polymerization
Plasma polymers can be thought of as a type of graft polymer since they are grown off of a substrate. These polymers are known ... polymethyl acrylate, polymethyl methacrylate, polyvinyl acetate, polyisoprene, polyisobutene, and polyethylene. Nearly all ... The most significant difference between conventional polymers and plasma polymers is that plasma polymers do not contain ... Plasma polymers also contain internal stress. If a thick layer (e.g. 1 µm) of a plasma polymer is deposited on a glass slide, ...
Synthetic resin
Another synthetic polymer, sometimes called by the same general category, is acetal resin. By contrast with the other ... In order to undergo curing, resins typically contain reactive end groups, such as acrylates or epoxides. Some synthetic resins ... Synthetic resins are industrially produced resins, typically viscous substances that convert into rigid polymers by the process ... Silicone resins are silicone-based polymers that exhibit various useful properties like weatherability (durability), ...
Reversible addition−fragmentation chain-transfer polymerization
... the synthesis of polymers with defined end-groups". Polymers. 46 (19): 8458-8468. doi:10.1016/j.polymer.2004.12.061. Coote, M. ... Some monomers capable of polymerizing by RAFT include styrenes, acrylates, acrylamides, and many vinyl monomers. Additionally, ... The Z group primarily affects the stability of the S=C bond and the stability of the adduct radical (Polymer-S-C•(Z)-S-Polymer ... Moad, G.; E. Rizzardo; S. H. Thang (2008). "Radical addition fragmentation chemistry in polymer synthesis". Polymer. 49 (5): ...
Robert Gilbert (chemist)
Aqueous dispersions of polymer particles. PCT/AU02/01735 (2002) S Peach, BR Morrison, RG Gilbert. Finely divided polymer ... "Pulsed-laser polymerization measurements of the propagation rate coefficient for butyl acrylate". RA Lyons, J Hutovic, MC Piton ... In 1992, he was appointed full professor, and in 1999 he started the Key Centre for Polymer Colloids, funded by the Australian ... Modified rubber polymer latex. PCT/AU98/00191 (1998) D Kukulj, TP Davis, RG Gilbert. Polymerization reactions under ...
David C. Watts
From 1967 until 1970, he undertook research in polymer science for a Ph.D. at the University of Wales, under the supervision of ... established between empirical representation and the resulting experimental curves for the α relaxation in polyethyl acrylate, ... This work has been identified by Graham Williams and Watts in the dielectric behavior of solid polymers and mathematically re- ... His dissertation was titled The dielectric behavior of polymers. Between 1978 and 1983, Watts completed biblical language and ...
John Texter
... smart polymers) and polymerized ionic liquids. Microemulsion polymerization of ionic liquid surfactant acrylates was used to ... He is professor emeritus of polymer and coating technology at Eastern Michigan University (EMU) in Ypsilanti, Michigan, and ... In more recent years, he has become a leading innovator in the fields of stimuli-responsive polymers ( ... and stimuli-responsive polymers based on ionic liquids, for his international conference organization activities, including ...
Chemical compound microarray
Polymer Microarrays Polymer microarrays have been developed to allow screening for new polymeric materials to direct different ... This is particularly true for the in situ polymerisation of acrylate monomers in minute volumes. Uttamchandani, M. et al. (2005 ... The lack of control in the production of many of these polymer arrays suggests that any practical application of these ...
Sizing
Different types of water soluble polymers called textile sizing agents/chemicals such as modified starch, polyvinyl alcohol ( ... PVA), carboxymethyl cellulose (CMC), and acrylates are used to protect the yarn. Also wax is added to reduce the abrasiveness ... or surface sizing agents such as acrylic co-polymers. Surface sizing agents are amphiphilic molecules, having both hydrophilic ...
Vinyl group
Vinyl polymers contain no vinyl groups. Instead they are saturated. The following table gives some examples of vinyl polymers. ... Allyls, acrylates and styrenics contain vinyl groups. (A styrenic crosslinker with two vinyl groups is called divinyl benzene ... Progress in Polymer Science. 27 (10): 2021-2054. doi:10.1016/S0079-6700(02)00066-7. Constable, Edwin C.; Housecroft, Catherine ... Vinyl groups can polymerize with the aid of a radical initiator or a catalyst, forming vinyl polymers. ...
Bis-GMA
Bearing two polymerizable groups, it is prone to form a crosslinked polymer that is used in dental restorations. For dental ... work, highly viscous bis-GMA is mixed with aluminosilicate particles, crushed quartz and other related acrylates; changes to ...