Zhang, Jie’s team published research in Journal of the American Chemical Society in 143 | CAS: 1761-71-3

Journal of the American Chemical Society 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 C6H12Br2, Formula: C13H26N2.

Zhang, Jie published the artcileSulfur Conversion to Multifunctional Poly(O-thiocarbamate)s through Multicomponent Polymerizations of Sulfur, Diols, and Diisocyanides, Formula: C13H26N2, the publication is Journal of the American Chemical Society (2021), 143(10), 3944-3950, database is CAplus and MEDLINE.

Sulfur, which is generated from the waste byproducts in the oil and gas refinery industry, is an abundant, cheap, stable, and readily available source in the world. However, the utilization of excessive amounts of sulfur is mostly limited, and developing novel methods for sulfur conversion is still a global concern. Here, the authors report a facile one-step conversion from elemental sulfur to functional poly(O-thiocarbamate)s through a multicomponent polymerization of sulfur, diols, and diisocyanides, which possesses a series of advantages such as mild condition (55°C), short reaction time (1 h), 100% atom economy, and without any transition metal in the catalyst system. Seven poly(O-thiocarbamate)s are constructed with high yields (up to 95%), large mol. weight (up to 53100 of Mw), good solubility in organic solvents, and completely new polymer structures. The poly(O-thiocarbamate)s possess a high refractive index above 1.7 from 600 to 1700 nm by adjusting the sulfur content. By incorporating tetraphenylethene (TPE) moieties into the polymer structure, the poly(O-thiocarbamate)s can also be designed as fluorescent sensors to detect the harmful metal cation Hg2+ in a turn-on mode with high sensitivity (LOD = 32 nM) and excellent selectivity (over interference cations of Pb2+, Au3+, Ag+). Different from the previous reports, the exact coordination structure is first identified by single-crystal X-ray diffraction, which revealed a tetracoordinated bonding mode (two sulfur and two chloride) using a model coordination compound

Journal of the American Chemical Society 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 C6H12Br2, Formula: C13H26N2.

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

 

Sun, Xiaoyu’s team published research in Journal of Colloid and Interface Science in 586 | CAS: 1761-71-3

Journal of Colloid and Interface 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 C10H20O2, Product Details of C13H26N2.

Sun, Xiaoyu published the artcileEffect of non-ionic surfactants on the adsorption of polycyclic aromatic compounds at water/oil interface: A molecular simulation study, Product Details of C13H26N2, the publication is Journal of Colloid and Interface Science (2021), 766-777, database is CAplus and MEDLINE.

Mol. simulations can provide unique insights into the adsorption and intermol. interactions of polycyclic aromatic compounds (PACs) and non-ionic surfactants at water/oil interface. Mol. dynamic simulations were performed to study the adsorption of PACs at water/oil interface, and the effect of adding non-ionic surfactants. PAC architecture, solvent type, structure and concentration of non-ionic surfactants were varied to address the complex interplay between PAC-surfactant interaction, PAC solubility, and structure-dependent PAC aggregation. PACs with multiple cores (PacM) partially adsorbed on the interface, in the form of small and loosely structured aggregates. Adding non-ionic surfactant Brij-93 induced desorption of PacM at both water/toluene and water/heptane interfaces. Another non-ionic surfactant, (EO)5(PO)10(EO)5, also reduced the adsorption of PacM at water/toluene interface but enhanced their adsorption at water/heptane interface. PACs with a single large core strongly adsorbed on both interfaces, forming compact aggregated structures. Adding the two types of non-ionic surfactants did not induce desorption. This work identified two opposite roles of non-ionic surfactants in the adsorption of PACs, namely competition and co-adsorption, and provided useful insights into how the roles of non-ionic surfactants might be affected by their concentration, as well as the solubility and interfacial behaviors of the PACs.

Journal of Colloid and Interface 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 C10H20O2, Product Details of C13H26N2.

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

 

Liu, Yingchun’s team published research in Journal of Materials Science in 55 | CAS: 1761-71-3

Journal of Materials 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, Category: quinuclidine.

Liu, Yingchun published the artcileVertically aligned dopamine-reduced graphene oxide with high thermal conductivity for epoxy nanocomposites, Category: quinuclidine, the publication is Journal of Materials Science (2020), 55(21), 8917-8929, database is CAplus.

Designing ordered fillers arrangement and superior interfacial adhesion between fillers and matrix can improve the thermal conductivity (TC) of composites. Here, bioinspired dopamine chem. was firstly used to reduce graphene oxide (GO) and introduce polydopamine nanoparticles on the surface of GO. Then, a well-aligned epoxy/reduced GO films (EP/RGFs) nanocomposites were prepared via the simple vacuum impregnation. Compared with the random distribution of fillers in a traditional blending composite, fillers were selectively distributed in matrix and continuous thermal conductive network structures were constructed in this strategy. As a result, the nanocomposite exhibited a high TC of 0.913 W m-1 K-1 which is 4.8 times higher than pure EP. In addition, curing kinetics showed that RGFs were similar to an amine-type curing agent that reacted with EP and bonded them tightly, and its nanocomposites reaction activation energy is lower than that of pure EP. These results indicated RGFs possessed excellent interface compatibility with EP and suppressing effectively the phonon scattering at the EP-RGFs interface. Cooling experiments showed that nanocomposites can reduce by about 10°C for a hot source (80°C), demonstrating it can transfer efficiently heat energy from the heat source. This study provides an effective method for the preparation of high-performance thermal management composites.

Journal of Materials 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, Category: quinuclidine.

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

 

Wolfgang, Josh D.’s team published research in Macromolecular Rapid Communications in 42 | CAS: 1761-71-3

Macromolecular Rapid 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 C10H12O5, COA of Formula: C13H26N2.

Wolfgang, Josh D. published the artcileNon-isocyanate Polyurethanes from 1,1′-Carbonyldiimidazole: A Polycondensation Approach, COA of Formula: C13H26N2, the publication is Macromolecular Rapid Communications (2021), 42(13), 2100163, database is CAplus and MEDLINE.

1,1′-Carbonyldiimidazole (CDI) provides a platform to generate high mol. weight polyurethanes from industrially relevant diols and diamines. CDI, which is described in the literature for its use in amidation and functionalization reactions, enables the production of well-defined and stable polyurethane precursors, thus eliminating the need for isocyanates. Herein, the functionalization of 1,4-butanediol with CDI yields an electrophilic biscarbamate, bis-carbonylimidazolide (BCI), which is suitable for further step-growth polymerization in the presence of amines. Elevated reaction temperatures enable the solvent-, catalyst-, and isocyanate-free polycondensation reaction between the BCI monomer and various diamines. The thermoplastic polyurethanes produced from this reaction demonstrate high thermal stability, tunable glass transition temperatures based on incorporation of flexible polyether segments, and mech. ductile thin films. CDI functionalized diols will allow the preparation of diverse polyurethanes without the use of isocyanate-containing monomers.

Macromolecular Rapid 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 C10H12O5, COA of Formula: C13H26N2.

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

 

Liu, Xin’s team published research in Chemical Science in 12 | CAS: 1761-71-3

Chemical 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, Application of 4,4-Diaminodicyclohexyl methane.

Liu, Xin published the artcileIndirect reduction of CO2 and recycling of polymers by manganese-catalyzed transfer hydrogenation of amides, carbamates, urea derivatives and polyurethanes, Application of 4,4-Diaminodicyclohexyl methane, the publication is Chemical Science (2021), 12(31), 10590-10597, database is CAplus and MEDLINE.

A manganese pincer complex as a versatile catalyst for the transfer hydrogenation of amides, carbamates, urea derivatives and even polyurethanes leading to the corresponding alcs., amines and methanol as products were reported. Since these compound classes can be prepared using CO2 as a C1 building block the reported reaction represents an approach to the indirect reduction of CO2. Notably, these are the first examples on the reduction of carbamates and urea derivatives as well as on the C-N bond cleavage in amides by transfer hydrogenation. The general applicability of this methodol. is highlighted by the successful reduction of 12 urea derivatives, 26 carbamates and 11 amides. The corresponding amines, alcs. and methanol were obtained in good to excellent yields up to 97%. Furthermore, polyurethanes were successfully converted which represents a viable strategy towards a circular economy. Based on control experiments and the observed intermediates a feasible mechanism was proposed.

Chemical 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, Application of 4,4-Diaminodicyclohexyl methane.

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

 

Rajagopalan, Narayanan’s team published research in Progress in Organic Coatings in 156 | CAS: 1761-71-3

Progress in Organic Coatings 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, Quality Control of 1761-71-3.

Rajagopalan, Narayanan published the artcileDegradation mechanisms of amine-cured epoxy novolac and bisphenol F resins under conditions of high pressures and high temperatures, Quality Control of 1761-71-3, the publication is Progress in Organic Coatings (2021), 106268, database is CAplus.

Projections of continued growth in the global hydrocarbon demand and fast depleting resources push the oil and gas industry to explore and produce in geol. formations with abnormal high pressures and temperatures, so-called HPHT conditions. In the present study, the largely unexplored degradation mechanisms for amine-cured epoxy novolac (EN) and bisphenol F (BPF) epoxy resins are investigated at lower limits of HPHT. Using a batch-like reactor encompassing the three relevant phases (a gas mixture of nitrogen and carbon dioxide, a hydrocarbon phase of aromatic para-xylene, and an artificial seawater phase), the conditions of high pressures and high temperatures were simulated. The EN and BPF coated steel panels were placed inside the batch reactor. In the gas phase-exposed zone, both EN and BPF remained essentially intact with no major defects. However, due to para-xylene uptake that resulted in a free volume increase (i.e. lowering of the glass transition temperature), the hydrocarbon-exposed zones of EN and BPF were partly covered by an oxide of iron, the origin of which was found to be diffusion of anodically-dissolved iron from the steel-coating interface. The enhanced resin chain mobility at the hydrocarbon-seawater interphase allowed higher rates of diffusion of seawater ions to the steel-coating interface with clear signs of coating degradation Finally, the seawater phase induced small blisters in the EN coating, whereas for BPF, a complete loss of adhesion between the coating and the substrate was observed Simulation of Rapid Gas Decompression (RGD), uncovered the role of RGD in the iron oxide formation process for both EN and BPF coatings. In summary, when compared to BPF, the EN network showed superior performance under conditions of HPHT.

Progress in Organic Coatings 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, Quality Control of 1761-71-3.

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

 

Yang, Xiu’s team published research in Chinese Physics B in 29 | CAS: 1761-71-3

Chinese Physics B 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 C10H14N2O, Related Products of quinuclidine.

Yang, Xiu published the artcileEnhanced reflection chiroptical effect of planar anisotropic chiral metamaterials placed on the interface of two media, Related Products of quinuclidine, the publication is Chinese Physics B (2020), 29(10), 107303, database is CAplus.

The strong chiroptical effect is highly desirable and has a wide range of applications in biosensing, chiral catalysis, polarization tuning, and chiral photo detection. In this work, we find a simple method to enhance the reflection CD (CDR) by placing the planar anisotropic chiral metamaterials (i.e., Z-shaped PACMs) on the interface of two media (i.e., Z-PCMI) with a large refractive index difference. The maximum reflection CDR from the complex system can reach about 0.840 when the refractive index is set as ntop = 4.0 and nbottom = 1.49, which is approx. three times larger than that of placing the Z-shaped PACMs directly on the substrate (i.e., Z-PCMS). While the min. reflection CDR is 0.157 when the refractive index is set as ntop = 1.0 and nbottom = 1.49. So we can get a large available range of reflection CDR from -0.840 to -0.157. Meanwhile, the transmission CDT remains unchanged with the refractive index ntop increment. Our in-depth research indicates that the large reflection CDR is derived from the difference of non-conversion components of the planar anisotropic chiral metamaterials’ reflection matrixes. In short, we provide a simple and practical method to enhance the chiroptical effect by changing the refractive index difference between two media without having to design a complex chiral structure.

Chinese Physics B 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 C10H14N2O, Related Products of quinuclidine.

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

 

Hatter, Christine B.’s team published research in Composites, Part B: Engineering in 182 | CAS: 1761-71-3

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.

Hatter, Christine B. published the artcileMicromechanical response of two-dimensional transition metal carbonitride (MXene) reinforced epoxy composites, Name: 4,4-Diaminodicyclohexyl methane, the publication is Composites, Part B: Engineering (2020), 107603, database is CAplus.

MXenes have attracted much attention as fillers in polymer composites due to their superior elec. and mech. properties making them ideal for creating multifunctional composites. In this work, Ti3CN-epoxy composites were prepared via solvent processing and cured with amine-based hardener. The effects of Ti3CN content in the epoxy system on the thermal degradation behavior and micromech. properties were investigated. The extent of intercalation of epoxy between MXene flakes was analyzed by transmission electron microscopy. Nanoindentation anal. of MXene-epoxy composites exhibited improved mech. properties with increasing MXene content with highest increase to 12.8 GPa Young’s modulus for 90 wt% Ti3CN. An increase in creep resistance of composites was observed at maximum loading of Ti3CN by 46% compared to neat epoxy.

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

 

Zhang, H. J.’s team published research in Polymer in 190 | CAS: 1761-71-3

Polymer 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 C18H20N2O12, Quality Control of 1761-71-3.

Zhang, H. J. published the artcileEffect of free-volume holes on static mechanical properties of epoxy resins studied by positron annihilation and PVT experiments, Quality Control of 1761-71-3, the publication is Polymer (2020), 122225pp., database is CAplus.

The tensile, flexural, and fracture toughness properties of seven chem. different amine-cured epoxy resins were studied. Positron annihilation lifetime and pressure-volume-temperature (PVT) experiments were performed on each epoxy resin to characterize the average size and fraction, resp., of free-volume holes. A neg. correlation between hole fraction and hole size was revealed for these chem. different epoxy resins. Better tensile and flexural mech. properties (higher tensile modulus and lower tensile strain at break; higher flexural modulus, higher flexural strength, and lower flexural strain at break) were clearly observed for epoxy resins with smaller hole size and higher hole fraction. However, no clear relationship between fracture toughness and hole properties was found. The correlations between (tensile and flexural) static mech. properties and hole properties for chem. different epoxy resins should provide guidance for further improvements in the mech. properties of carbon fiber-reinforced polymers.

Polymer 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 C18H20N2O12, Quality Control of 1761-71-3.

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

 

Zhang, H. J.’s team published research in Journal of Physical Chemistry B in 124 | CAS: 1761-71-3

Journal of Physical Chemistry B 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 0, COA of Formula: C13H26N2.

Zhang, H. J. published the artcileEffect of Free-Volume Hole Fraction on Dynamic Mechanical Properties of Epoxy Resins Investigated by Pressure-Volume-Temperature Technique, COA of Formula: C13H26N2, the publication is Journal of Physical Chemistry B (2020), 124(9), 1824-1832, database is CAplus and MEDLINE.

Dynamic mech. anal. experiments were carried out to investigate the mech. properties of four types of chem. different epoxy resins. Pressure-volume-temperature (PVT) experiments were performed to determine the free-volume hole fraction (hPVT) of each epoxy resin using the Simha-Somcynsky lattice-hole theory. Using the Williams-Landel-Ferry equation, the correlations between the relative hole fraction (1 – hPVTTr/hPVT, where hPVTTr is the hole fraction at a reference temperature Tr) and four typical parameters reflecting dynamic mech. properties [storage modulus (E’), loss modulus (E”), damping factor (tanδ), and complex viscosity (|η*|)] were studied at from Tg(PVT) (the glass transition temperature determined by PVT data) to Tg(PVT) + 100°C. At from Tg(Eonset) (temperature corresponding to the intersection of the two tangent fitting lines in the E'(T) curve indicating the glassy-state and glass-transition stages) to Tg(PVT) + 100°C, the variations in the four dynamic mech. parameters with a relative hole fraction could be separated into two distinct categories: (i) log[E'(T)] and log[|η*|(T)] decreased linearly to their min. values and then remained nearly unchanged with increasing relative hole fraction, and (ii) log[E”(T)] and log[tanδ(T)] first increased monotonically to their maximum values and then decreased linearly with the increasing relative hole fraction. This study demonstrates that the PVT technique is a feasible and reliable exptl. method to determine the hole fractions of thermoset polymers.

Journal of Physical Chemistry B 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 0, COA of Formula: C13H26N2.

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