Tag: M.W=200-250

Masutani, Yusuke published the artcileShape memory property of carbon fiber / epoxy resin composite materials, HPLC of Formula: 1761-71-3, the publication is Zairyo (2021), 70(1), 25-30, database is CAplus.

The authors investigated an effect of carbon fiber on shape memory property of carbon fiber / shape memory polymer (epoxy resin) composites by using dynamic mech. anal. (DMA), shape memory test, and mech. constitutive model. As a result of DMA, the storage modulus (E’) of the composite material (CF/EP) was improved by CF component, as compared with that of the pure epoxy resin (pure EP). Especially, E’ at rubbery region was remarkably increased with two decades. From the results of shape memory test, CF/EP showed good shape recovery behavior as well as pure EP. Contrary, the shape fixity ratio of CF/EP was lower than that of pure EP. This is because that the difference in E’ below / above the glass transition temperature (T_g) of CF/EP became smaller (less than one decade) than pure EP (two decades). In addition, the shape recovery of CF/EP started at lower temperature than T_g, although the recovery of pure EP showed around T_g. In order to examine the shape recovery behavior of CF/EP, the authors compared the viscoelastic properties of three samples, pure EP, CF layer and the composite. As a result, the CF layer had higher E’ than CF/EP, and no significant change in E’ occurred around T_g. From the results, the authors speculated that the CF layer acted as a shape recovery component for the composite material. Furthermore, the authors proposed a mech. constitutive model, in which the CF layer was assumed as the recover component, to qual. explain the shape recovery behavior of CF/EP composite. The simulated result by the constitutive model reproduced the trend of anomalous shape recovery behavior below T_g of CF/EP.

Zairyo published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C13H26N2, HPLC of Formula: 1761-71-3.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Meyer, Christopher S. published the artcileMesoscale modeling of ballistic impact experiments on a single layer of plain weave composite, Name: 4,4-Diaminodicyclohexyl methane, the publication is Composites, Part B: Engineering (2022), 109753, database is CAplus.

To gain fundamental understanding of energy absorbing mechanisms during high velocity impact of plain weave S-2 glass/epoxy composites, single layer composites are ballistically tested and modeled. To avoid boundary condition effects, targets were 0.6 m by 0.6 m with free boundaries. Targets were perforated by 17 grain, 0.22 caliber fragment simulating projectiles. Experiments focused on determining ballistic limit velocity and the associated damage modes. The experiments were simulated with a continuum finite element model with effective plain weave properties that predicted the ballistic limit velocity with 6% error. A mesoscale model that incorporates the woven fabric architecture and lower length scale energy absorbing mechanisms was also developed. The mesoscale model includes accurate geometry and fiber volume fraction, rate-dependent matrix behavior, and important damage mechanisms including tow-tow delamination, tow pullout and frictional sliding. The mesoscale model predicted ballistic limit velocity with 1% error and more accurately predicts the deformation modes during ballistic impact and penetration than the continuum modeling approach. The mesoscale model indicated two phases of penetration, the first dominated by momentum transfer and the second dominated by tow tension and pullout. In a materials-by-design framework, the mesoscale model was used to quantify energy dissipation and identify important damage mechanisms that could be optimized to provide improved ballistic penetration resistance.

Composites, Part B: Engineering published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C13H26N2, Name: 4,4-Diaminodicyclohexyl methane.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Ali, Imran published the artcileSynthesis, characterization, simulation, DNA binding and anticancer activities of Co(II), Cu(II), Ni(II) and Zn(II) complexes of a Schiff base containing o-hydroxyl group nitrogen ligand, Application of 4,4-Diaminodicyclohexyl methane, the publication is Inorganic Chemistry Communications (2020), 108004, database is CAplus.

New Schiff’s base (ligand) and its copper, cobalt, nickel and zinc metal ion complexes were synthesized with a good yield of 86 to 68.9%. and characterized by various anal. techniques. The spectral data confirms the formation of the compounds The ligand and the metal complexes were screened for anticancer activities with A549 and H1299 lung cancer lines. The results indicated that the zinc metal ion complex was the most active with 83.60 and 88.52% inhibitions for A549 and H1299 lung cancer lines at 20 mM concentration Besides, DNA binding study confirmed good binding constants (0.94 x 105-2.31 x 105) with a maximum of zinc metal ion complex (2.31 x 105); confirming the anticancer activities results. The docking study also confirmed that the reported mols. interacted with DNA strongly by hydrogen bonding and hydrostatic interactions with -4.6 kCal/mol as binding energy. It was also observed that the reported mols. preferred minor grooves of DNA for interactions. The excellent anticancer activities of metal complexes confirmed that these complexes may be the future lung cancer medication.

Inorganic Chemistry Communications published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C13H26N2, Application of 4,4-Diaminodicyclohexyl methane.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Ding, Wen published the artcileMolecular-oxygen-promoted Cu-catalyzed oxidative direct amidation of nonactivated carboxylic acids with azoles, Computed Properties of 20029-52-1, the publication is Beilstein Journal of Organic Chemistry (2015), 2158-2165, database is CAplus and MEDLINE.

A copper-catalyzed oxidative direct formation of amides from nonactivated carboxylic acids and azoles with dioxygen as an activating reagent was reported. The azole amides were produced in good to excellent yields with a broad substrate scope. The mechanistic studies revealed that oxygen played an essential role in the success of the amidation reactions with copper peroxycarboxylate as the key intermediate. Transamidation occurs smoothly between azole amide and a variety of amines.

Beilstein Journal of Organic Chemistry published new progress about 20029-52-1. 20029-52-1 belongs to quinuclidine, auxiliary class Carboxylic acid,Benzene, name is 4-Cyclohexylbenzoic acid, and the molecular formula is C13H16O2, Computed Properties of 20029-52-1.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Asemani, H. R. published the artcileDual-curable coatings obtained from multi-functional non-isocyanate polyurethane oligomers, Related Products of quinuclidine, the publication is Journal of Coatings Technology and Research, database is CAplus.

The growing concerns and impending regulations on the usage of monomeric isocyanates in the production of polyurethane resins have led to the introduction of alternative non-isocyanate polyurethane (NIPU) systems. Although two-component NIPU coatings based on the reaction of cyclic carbonates and aliphatic amines have emerged as a promising option, they are still associated with two significant drawbacks: lower crosslinking densities due to reduced functionality of the oligomers and low ambient-temperature reactivity. This study reports the utilization of a hybrid approach to address these drawbacks. Amine-functional NIPU oligomers (NI-PUPA) were synthesized by the reaction of cycloaliphatic amine functional compounds and multi-functional cyclic carbonates in an excess amine molar ratio. After mixing the NI-PUPAs with (3-glycidyloxypropyl) trimethoxysilane (GPTMS), a dual-curable coating could be achieved by ambient curing of amines and epoxies and moisture curing of alkoxy silanes. A comparative exptl. design was implemented to evaluate the effect of an addnl. curing mechanism. The results revealed that the addnl. moisture curing led to faster ambient curing, faster development of properties, enhanced flexibility even at higher crosslinking densities, and better corrosion resistance. Such advancement could facilitate the future implementation of NIPUs in high-performance ambient-curing coating applications.

Journal of Coatings Technology and Research published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C13H26N2, Related Products of quinuclidine.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Zhou, Zhuxin published the artcileAchieving white-light emission in a single-component polymer with halogen-assisted interaction, Application of 4,4-Diaminodicyclohexyl methane, the publication is Science China: Chemistry (2021), 64(3), 467-477, database is CAplus.

White-light emitting (WLE) polymers have attracted continuous attention for their promising applications in solid-state lighting, flexible display and related fields. However, achieving dual-emission and pure white-light emission in a single-component polymer is still challenging. In this study, a brominated single-component polymer BrOD-TFB was designed and synthesized, which shows dual-emission and white light emission properties in solution and room-temperature phosphorescence (RTP) in thin films. The dual-emission properties can be tuned by concentration, solvent polarity, and excitation energy. Spectral anal. and theor. calculations reveal that the origin of the high-energy emission band (HEB) is intramol. charge transfer (ICT) along the polymer chain, while the low-energy emission band (LEB) originates from the excited-state related to the intra-chain and inter-chain C-Br···π interactions as demonstrated by the single-crystal structure of the model compound Appropriate control of the formation and the destruction of the halogen-assisted interactions can initiate white-light emission in the single-component polymer. More interestingly, by dispersing BrOD-TFB (0.1 wt%) in a non-emissive, colorless and transparent polymer, the characteristics of this white-light emission can be fully demonstrated while exhibiting unexpected RTP properties, with photoluminescence quantum efficiency (φ_PL) of up to 23% and CIE coordinates of (0.32, 0.32).

Science China: Chemistry published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C10H9NO, Application of 4,4-Diaminodicyclohexyl methane.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Beyer, Frederick L. published the artcileApplication of the small-angle scattering invariant to morphological behavior in ballistic materials, Recommanded Product: 4,4-Diaminodicyclohexyl methane, the publication is Journal of Applied Polymer Science (2021), 138(21), 50478, database is CAplus.

The small-angle scattering invariant provides a useful tool for quantifying nanoscale morphol. features in two-phase materials, when scattering data of sufficient quality and angular range are available. In this work, an invariant anal. has been performed on small-angle X-ray scattering data for a series of epoxy-amines previously found to have relatively high-energy absorption (KE50) in ballistic impact tests. The improved performance was hypothesized to be a result of the formation of an ill-defined two-phase morphol., observed but not quantified using transmission electron microscopy. In this anal., the ballistic performance and the scattering invariant were found to be strongly correlated, with a Pearson’s linear correlation coefficient of 0.94. Facile anal. enabled by a custom software procedure suggests that this previously difficult anal. may be more broadly useful, even in high throughput applications.

Journal of Applied Polymer Science published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C13H26N2, Recommanded Product: 4,4-Diaminodicyclohexyl methane.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Duan, Jiang published the artcileDisilyl Bis(Secondary Amine)-Enabled Epoxy Ring-Opening and Silylotropic N → O Migration Leading to Low Dielectric Epoxy Copolymers, HPLC of Formula: 1761-71-3, the publication is Macromolecules (Washington, DC, United States) (2021), 54(14), 6947-6955, database is CAplus.

This work presents a strategy for fabricating low dielec. epoxy copolymers through copolymerizing bisphenol A diglycidyl ether with N,N’-disilyl bis(secondary amine)s, a series of difunctional silylamines synthesized by silylation of bis(secondary amine)s. A study on the model reaction of monoepoxy with monofunctional silylamines identified that the reaction proceeded smoothly in THF with Mg(ClO₄)₂ catalysis and mechanistically through sequential silylamine-induced epoxy ring-opening and silylotropic N → O migration, a process with favorable Gibbs free energy changes as confirmed by d. functional theory calculations The copolymers demonstrated remarkably low dielec. constants and dielec. losses due to the formation of the low-polarizable silyloxyl instead of the hydroxyl group in polymerization and the enlarged mol. free volume In addition, the copolymers showed desirable toughness, hydrophobicity, and thermal stability. As a tool to achieve these desirable features, the strategy developed in this work may find promising application in designing low dielec. epoxy resin materials for use in the microelectronic field.

Macromolecules (Washington, DC, United States) published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C13H26N2, HPLC of Formula: 1761-71-3.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Pacut, Ryszard published the artcileReduction of polyaromatic carboxylic acids with lithium in ethylenediamine and tetrahydrofuran, Quality Control of 20029-52-1, the publication is Polish Journal of Chemistry (1985), 59(4), 447-51, database is CAplus.

The use of large amounts of Li in the title reduction led to ring reduction without affecting the CO₂H group. Thus, treatment of 5 mmole 1-naphthoic acid with 50 mmole Li in H₂NCH₂CH₂NH₂-THF gave reduced naphthoic acid I. Reduction of 2-naphthoic acid with Li (1:5 molar ratio) gave hydronaphthoic acid II, whereas using (1:15 molar ratio) gave III (R = CO₂H, CHO). Five mmole 4-PhC₆H₄CO₂H reduced with 50 mmole Li gave benzoic acid IV.

Polish Journal of Chemistry published new progress about 20029-52-1. 20029-52-1 belongs to quinuclidine, auxiliary class Carboxylic acid,Benzene, name is 4-Cyclohexylbenzoic acid, and the molecular formula is C13H16O2, Quality Control of 20029-52-1.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Charrier, Jean-Damien published the artcileDiscovery and Structure-Activity Relationship of 3-Aminopyrid-2-ones as Potent and Selective Interleukin-2 Inducible T-Cell Kinase (Itk) Inhibitors, Synthetic Route of 20029-52-1, the publication is Journal of Medicinal Chemistry (2011), 54(7), 2341-2350, database is CAplus and MEDLINE.

Interleukin-2 inducible T-cell kinase (Itk) plays a role in T-cell functions, and its inhibition potentially represents an attractive intervention point to treat autoimmune and allergic diseases. Herein we describe the discovery of a series of potent and selective novel inhibitors of Itk. These inhibitors were identified by structure-based design, starting from a fragment generated de novo, the 3-aminopyrid-2-one motif. Functionalization of the 3-amino group enabled rapid enhancement of the inhibitory activity against Itk, while introduction of a substituted heteroaromatic ring in position 5 of the pyridone fragment was key to achieving optimal selectivity over related kinases. A careful anal. of the hydration patterns in the kinase active site was necessary to fully explain the observed selectivity profile. The best mol. prepared in this optimization campaign, 7v, inhibits Itk with a K_i of 7 nM and has a good selectivity profile across kinases.

Journal of Medicinal Chemistry published new progress about 20029-52-1. 20029-52-1 belongs to quinuclidine, auxiliary class Carboxylic acid,Benzene, name is 4-Cyclohexylbenzoic acid, and the molecular formula is C13H16O2, Synthetic Route of 20029-52-1.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider