Sim, Jee-Hyun’s team published research in Polymers (Basel, Switzerland) in 14 | CAS: 1761-71-3

Polymers (Basel, Switzerland) 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 C17H19N3O6, Application of 4,4-Diaminodicyclohexyl methane.

Sim, Jee-Hyun published the artcileExperimental and Digimat-FE Based Representative Volume Element Analysis of Dye-Mixed Colored Resin and Carbon Fiber, Application of 4,4-Diaminodicyclohexyl methane, the publication is Polymers (Basel, Switzerland) (2022), 14(5), 1028, database is CAplus and MEDLINE.

Recently, the automobile industry has demanded weight reduction, so research on materials is being actively conducted. Among this research, carbon fiber-reinforced composite materials are being studied a lot in the automobile industry due to their excellent mech. properties, chem. resistance, and heat resistance. However, carbon fiber-reinforced composite materials have disadvantages, in that they are not free from color selection, and have weak interfacial bonding strength. In this study, a colored epoxy resin was prepared by mixing epoxy-which is a thermosetting resin according to the pigment concentration (0.1, 0.3, 0.5, 1.0 wt%)-and curing shrinkage. Thermal expansion characteristics were analyzed and the concentration of 0.5 wt% pigment showed the lowest shrinkage and thermal expansion characteristics. In addition, to measure the interfacial shear strength (IFSS) of the carbon fiber and the colored epoxy resin, the IFSS was obtained by performing a microdroplet debonding test, and the strength of the pigment concentration of 0.5 wt% was reduced to a relatively low level. Through these experiments, it was determined that an epoxy resin in which 0.5 wt% pigment is mixed is the optimal condition. Finally, using the composite material modeling software (Digimat 2020.0), the representative volume element (RVE) of the meso-scale was set, and interfacial properties of carbon fibers and colored epoxy resins were analyzed by interworking with general-purpose finite element anal. software (Abaqus CAE).

Polymers (Basel, Switzerland) 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 C17H19N3O6, Application of 4,4-Diaminodicyclohexyl methane.

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

 

Feng, Xiang-Jun’s team published research in Archiv der Pharmazie (Weinheim, Germany) in 345 | CAS: 20029-52-1

Archiv der Pharmazie (Weinheim, Germany) 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, Name: 4-Cyclohexylbenzoic acid.

Feng, Xiang-Jun published the artcileSynthesis and Immunomodulating Activity of New Analogues of Fingolimod, Name: 4-Cyclohexylbenzoic acid, the publication is Archiv der Pharmazie (Weinheim, Germany) (2012), 345(2), 93-100, database is CAplus and MEDLINE.

Five new immunomodulators I.HCl (R = H, Et, n-Pr, n-Bu, n-Pen) in which a trans-4-alkyl-substituted cyclohexane replaces the flexible C8 alkyl chain of Fingolimod were synthesized. For in-vitro test, the compounds were dissolved in DMSO as a stock solution and diluted to a desired concentration with RPMI 1640 nutrient solution For in-vivo test, the compounds were prepared in pathogen-free saline containing 0.5% DMSO. These new immunomodulators displayed more potent immunoinhibitory activities in vitro and moderate immunomodulating activities in vivo. They show therapeutic effects on DNFB-induced DTH reaction and inhibitory effects on the antigen-specific T-cell proliferation.

Archiv der Pharmazie (Weinheim, Germany) 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, Name: 4-Cyclohexylbenzoic acid.

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

 

Jiang, Yuan’s team published research in ACS Applied Polymer Materials in 4 | CAS: 1761-71-3

ACS Applied Polymer Materials 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.

Jiang, Yuan published the artcileBiomass-Based Polyureas Derived from Rigid Furfurylamine and Isomannide, Recommanded Product: 4,4-Diaminodicyclohexyl methane, the publication is ACS Applied Polymer Materials (2022), 4(3), 2197-2204, database is CAplus.

Polyureas are important com. polymers that are widely used in construction, automobile industry, military field, and coatings. Biomass-based amines are attractive feedstock in the synthesis of versatile polyureas. Furan-based diamine and isomannide-derived (Im-derived) diamine can be interesting monomers for such materials due to their renewability and intrinsic rigidity, but they have not been extensively studied. Herein, biomass-based polyureas were prepared by polymerizing dicarbamates derived from furfurylamine and isomannide. The dicarbamates were produced in multigram-scale quantities with high purity and yield. A series of polyureas with reasonably high mol. weights were subsequently prepared by condensing the dicarbamates with various diamines. 1H NMR and 13C NMR spectroscopy confirmed the structure of the targeted copolymers. Exploration of thermal behavior by thermogravimetric anal. (TGA) and differential scanning calorimetry (DSC) revealed that the synthetic polyureas showed good thermal stability and glass-transition temperatures (Tg) ranging from 11 to 213°C.

ACS Applied Polymer Materials 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

 

La Scala, John J.’s team published research in High Performance Polymers in 32 | CAS: 1761-71-3

High Performance Polymers 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.

La Scala, John J. published the artcileEffect of methyl and methoxy substituents on dianilines for thermosetting polyimide system, Category: quinuclidine, the publication is High Performance Polymers (2020), 32(7), 801-822, database is CAplus.

4,4-Methylenedianiline (MDA) is widely used in high-temperature polyimide resins, including polymerization of monomer reactants-15. The toxicity of MDA significantly limits the manufacturability using this resin. Modifying the substitution and electronics of MDA could allow for the reduction of toxicity while maintaining the high-performing properties of the materials derived from the modified MDA. The addition of a single Me substituent, methoxy substituent, location of these substituents, and location of the amine relative to the phenolic bridge were modified as were other non-aniline diamines. Various anilines were condensed with paraformaldehyde under acidic conditions to yield dianilines. These dianilines and diamines were reacted with nadic anhydride and 3,3,4,4-benzophenonetetracarboxylic dianhydride in methanol to form the polyamic acid oligomers and heated at elevated temperature to form polyimide oligomers. It was found that the mol. weight of the oligomers derived from MDA alternatives was generally lower than that of MDA oligomers resulting in lower glass transition temperatures (Tgs) and degradation temperatures Addnl., methoxy substituents further reduce the Tg of the polymers vs. Me substituents and reduce the thermal stability of the resin. Methyl-substituted alternatives produced polyimides with similar Tgs and degradation temperatures The toxicity of the MDA alternatives was examined Although a few were identified with reduced toxicities, the alternatives with properties similar to that of MDA also had high toxicities.

High Performance Polymers 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