843-55-0Relevant articles and documents
Electrochemical and nonelectrochemical analyses of cardo polyesters at the metal/0.5?M H2SO4 interface for corrosion protection
Unnisa, Chan Basha Nusrath,Chitra, Subramanian,Nirmala Devi, Gowraraju,Kiruthika, Ayyasamy,Roopan, Selvaraj Mohana,Hemapriya, Venkatesan,Chung, Ill-Min,Kim, Seung-Hyun,Prabakaran, Mayakrishnan
, p. 5425 - 5449 (2019/07/30)
With the aim of decreasing the corrosion of metal specimens, two polyesters, namely 4-(1-(4-methoxyphenyl)cyclohexyl)phenyl 3-oxobutanoate (MPOB) and 4-(1-(4-methoxyphenyl)cyclohexyl)phenyl 10-oxoundecanoate (MPOU), were synthesized and utilized as corrosion inhibitors. The synthesized polyesters were characterized by Fourier-transform infrared (FT-IR) and nuclear magnetic resonance spectral analyses, followed by thermogravimetric and differential scanning calorimetry analyses. The protective effect of the polyesters on mild-steel specimens in 0.5?M H2SO4 medium was evaluated by nonelectrochemical and electrochemical methods. Gravimetric measurements revealed a decreased corrosion rate with increasing concentration of the inhibitors, reaching a maximum inhibition efficiency of 79.88% for MPOB and 92.98% for MPOU at 1000?ppm concentration at room temperature. The obtained experimental data were best fit by the Langmuir adsorption isotherm, suggesting monolayer adsorption. Thermodynamic parameters supported a physisorption mechanism. Electrochemical impedance spectroscopy showed increased charge-transfer resistance (Rct), in turn decreasing the double-layer capacitance and thereby favoring good inhibition of corrosion of mild steel. Mixed-type inhibition was revealed by potentiodynamic polarization analysis, suppressing anodic metal dissolution and cathodic hydrogen evolution. The mode of adsorption of the inhibitors on the mild-steel surface was additionally evaluated by morphological study using FT-IR and atomic force microscopy (AFM) analyses.
Method for preparing high-purity kerley Bette
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Paragraph 0033; 0034, (2016/10/07)
The invention relates to a preparation method of high-purity clinofibrate, the field of preparation of pharmaceutical compounds. The preparation method comprises the following steps: reacting cyclohexanone and phenol in concentrated hydrochloric acid and glacial acetic acid in a volume ratio of 3:1-7:1 to obtain an intermediate I crude product, decolorizing with a single solvent, and cooling to crystallize to obtain an intermediate I; reacting 2-methylbutyric acid with liquid bromine in phosphorus trichloride, reacting with anhydrous alcohol, extracting, and carrying out vacuum distillation to obtain an intermediate II; reacting the intermediate I and the intermediate II under solventless conditions to obtain an intermediate III; and hydrolyzing the intermediate III and sodium hydroxide, extracting, crystallizing to obtain a clinofibrate crude product; and recrystallizing with an anhydrous solvent to obtain the clinofibrate. The material proportion is adjusted to shorten the production operation period; the invention has the advantages of low energy consumption and low solvent consumption; and the obtained product has the advantages of uniform crystal grains, high purity and low cost.
(METH)ACRYLIC RESIN COMPOSITION, FILM, POLARIZING PLATE PROTECTIVE FILM, POLARIZING PLATE, AND LIQUID CRYSTAL DISPLAY DEVICE
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Paragraph 0264; 0268, (2017/01/23)
There is provided a (meth)acrylic resin composition containing a (meth)acrylic resin, and a compound denoted by General Formula (1) described below, a film formed by using the (meth)acrylic resin composition, and a polarizing plate and a liquid crystal display device including the film: wherein R1 to R8 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, or a hydrocarbon group having 1 to 12 carbon atoms, X represents a divalent alicyclic group having 4 to 20 carbon atoms, the alicyclic group represented by X may have at least one substituent group selected from a halogen atom, an aliphatic hydrocarbon group having 1 to 12 carbon atoms, and an aromatic hydrocarbon group having 6 to 15 carbon atoms.
Design of lamellar structured POSS/BPZ polybenzoxazine nanocomposites as a novel class of ultra low-k dielectric materials
Sasi Kumar,Ariraman,Alagar
, p. 19127 - 19136 (2014/05/20)
A novel class of lamellar structured polyhedral oligomeric silsesquioxane/bisphenol Z (POSS/BPZ) polybenzoxazine (PBz) nanocomposites was successfully designed by a facile one-step copolymerization technique. The chemical structures of the monomer and resulting polymer were characterized by Fourier transform infrared (FTIR) spectroscopy, 1H, 13C, DEPT-135, 29Si NMR (nuclear magnetic resonance) spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The desired cross-linked lamellae structural arrangement of POSS/BPZ polybenzoxazine (PBz) nanocomposites was confirmed by transmission electron microscopy (TEM). The BPZ-PBz and POSS-PBz layers were self-assembled by intermolecular hydrogen bonding in such a way as to form the lamellar structure during ring opening polymerization. An advantage of this lamellar structure is that 30% POSS/BPZ polybenzoxazine composite exhibits an ultra low-k value of 1.7 at 1 MHz as well as high thermal stability. the Partner Organisations 2014.
An improved, highly efficient method for the synthesis of bisphenols
Patil,Suryawanshi,Pawar,Shinde
experimental part, p. 2016 - 2019 (2012/06/04)
An efficient synthesis of bisphenols is described by condensation of substituted phenols with corresponding cyclic ketones in presence of cetyltrimethylammonium chloride and 3-mercaptopropionic acid as a catalyst in extremely high purity and yields. Copyright E-Journal of Chemistry 2004-2011.
Synthesis, characterization and bioactivity study of cyclic diesters of 4,4'-cyclohexylidene bisphenol
Jayamani,Prathipa
experimental part, p. 363 - 365 (2011/11/30)
Macrocycles 4,4'-cyclohexylidene bisphenyl butan-1,4-dioate,4,4'- cyclohexylidene bisphenyl hexan-1,6-dioate and 4,4'- cyclohexylidenebisphenyldecan- 1,10-dioate have been synthesized by ring closure using high dilution technique. Structures are characterized by physical, analytical and infrared, 1H , 13C NMR and mass spectral data. Compounds showed positive inhibition against gram positive bacteria Staphylococcus aurous.
Synthesis, characterization and bioactivity study of cobalt(III) and ruthenium(III) complexes of 4,4′-cyclohexylidene bisphenol
Jayamani,Kalpana
experimental part, p. 4260 - 4262 (2012/03/09)
Co(III) and Ru(III) complexes of 4,4′-cyclohexylidene bisphenol were synthesized and characterized by physical data, elemental analysis, molar conductance, IR, UV-VIS and TGA studies. Both the ligand and complexes were screened against Staphylococcus aureus and Candida albicans. They showed little activity when compared to standard drug chloramphenicol.
Synthesis, spectral study and antimicrobial screening of poly(4,4'-cyclohexylidene-R,R'-diphenylene diphosphate)
Bhadja,Parsania
experimental part, p. 1133 - 1139 (2012/04/10)
Polyphosphate of l.l-bisfR.RM-hydroxyphenyOcyclohexane (R,R"=H 1CH3and Cl) are synthesized by refluxing bisphenol-c derivative with phosphorous oxytrichloride in pyridiene at 95°C for 4hr and then at 240°C for 6hr. Polyphosphate have been ascertained by IR and NMR spectral data. Polyphosphate are also Characterized by their antibacterial and antifungal activities. The activity is interpreted in light of Wsphenol Structure and the nature of substituent(s).
Synthesis and spectral study of R,R′,4,4′-cyclohexylidene diphenyloxy acetic acids with antimicrobial activity
Bhadja,Parsania
experimental part, p. 1699 - 1704 (2012/06/15)
Synthesis of R,R′,4,4′-cyclohexylidene diphenyloxy acetic acids (R,R′=H,CH3and Cl) by dissolving 0.1 mole bisphenols in 0.4 mole sodim hydroxide with drop wise addition of 0.2 mole chloroacetic acid. The reaction mixture refluxed for 4h at 60°C. Phenoxy acids have been confirmed by IR and NMR spectral characterization. The acids are also characterized by their antimicrobial and antifungal activities. The activities have been interpreted in light of bisphenol structures and the nature of substituent(s). The wide scale uses of bisphenol bioactive agents have brought many advantages to the agricultural industries.
COLOR DEVELOPING COMPOSITION CONTAINING MOLECULAR COMPOUND, AND RECORDING MATERIAL
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, (2011/06/19)
Provided is a color-developing composition containing a molecular compound which has as a component compound a compound represented by formula (I) [wherein Y represents a C1-C12 hydrocarbon group which is chained or branched and saturated or unsaturated, or a C1-C8 hydrocarbon group which is chained or branched, saturated or unsaturated and has an ether or thioether bond; R1, R2, R3 and R4 each independently represent a C1-C6 alkyl group or C2-C6 alkenyl group; n, p, q and r each represents any integer of 0 to 4; and m represents any integer of 0 to 2]. Also provided is a recording material with a sufficient color-forming sensitivity, superior storage stability, and especially with an extremely little background fogging in a heat resistance test.
