Tag: M.W=400-500

Shibata, Mitsuhiro published the artcileBiobased polymer networks by the thiol-ene photopolymerization of allylated p-coumaric and caffeic acids, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is biobased polymer network thiolene photopolymerization allylated coumarate caffeate.

Diallylated p-coumaric acid (A2CM) and triallylated caffeic acid (A3CF) were synthesized by the reactions of p-coumaric acid and caffeic acid with allyl bromide in the presence of potassium carbonate. The thiol-ene photopolymerization of A2CM and a pentaerythritol-based tetrathiol (S4P) as well as that of A3CF/S4P at allyl/thiol and (allyl + enone)/thiol ratios of 1/1 produced cured products. The FT-IR spectral anal. revealed that the thiol-ene reaction of allyl and thiol groups mainly progressed for the products cured at an allyl/thiol ratio of 1/1, while both allyl and enone groups reacted with thiol groups for the products cured at an (allyl + enone)/thiol ratio of 1/1. The progress of the thiol-ene reaction of the enone and thiol groups caused the lowering of the glass transition and 5% weight loss temperatures (Tg and Td5). The A3CF/S4P cured at an allyl/thiol ratio of 1/1 exhibited the highest Tg, Td5, tensile strength, and tensile modulus among all the cured products.

Polymer Journal (Tokyo, Japan) published new progress about Elongation at break. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Thompson, Chase B. published the artcileGradient supramolecular interactions and tunable mechanics in polychaete jaw inspired semi-interpenetrating networks, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is gradient supramol tunable polychaete jaw semi IPN; zinc benzimidazolylpyridine terminated ethylene butylene copolymer.

Polychaete worms display a remarkable jaw structure, where a gradient in metal-ligand coordination down the length of the jaw results in a shift from hard to soft mechanics. To mimic these gradient structures, a Zn-coordinated supramol. polymer is crosslinked into a covalent matrix to afford supramol. semi-interpenetrating networks (SIPNs). These SIPN materials exhibit improved mechanics with a lower supramol. content (30 wt%), allowing for energy dissipation through cavitation to increase material toughness. The shift in mech. behavior is further attributed to the morphol., where the size of the phase-separated droplets and nature of the continuous phase in these SIPNs contributes to the material mechanics. Furthermore, chem. gradients are applied to these systems through exposure to a competitive ligand, offering control over the localization of supramol. interactions. These materials offer a framework to mediate mechanics while maintaining the ability to program gradient supramol. interactions.

European Polymer Journal published new progress about Elongation at break. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

He, Jia published the artcileHighly Sensitive Temperature Sensor Based on Cascaded Polymer-Infiltrated Fiber Mach-Zehnder Interferometers Operating near the Dispersion Turning Point, Related Products of alcohols-buliding-blocks, the main research area is sensor cascaded polymer Mach Zehnder interferometer dispersion turning point; dispersion turning point; femtosecond laser micromachining; fiber interferometer; optical fiber sensor; temperature measurement.

High-accuracy temperature measurement plays a vital role in biomedical, oceanog., and photovoltaic industries. Here, a highly sensitive temperature sensor is proposed and demonstrated based on cascaded polymer-infiltrated Mach-Zehnder interferometers (MZIs), operating near the dispersion turning point. The MZI was constructed by splicing a half-pitch graded index fiber (GIF) and two sections of single-mode fiber and creating an inner air cavity based on femtosecond laser micromachining. The UV-curable polymer-infiltrated air cavity functioned as one of the interference arms of MZI, and the residual GIF core functioned as the other. Two MZIs with different cavity lengths and infiltrated with the UV-curable polymers, having the refractive indexes on the different sides of the turning point, were created. Moreover, the effects of the length and the bending way of transmission SMF between the first and the second MZI were studied. As a result, the cascaded MZI temperature sensor exhibits a greatly enhanced temperature sensitivity of -24.86 nm/°C based on wavelength differential detection. The aforementioned result makes it promising for high-accuracy temperature measurements in biomedical, oceanog., and photovoltaic applications.

Polymers (Basel, Switzerland) published new progress about Absorption spectra. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hartman, Coral published the artcileBiodegradable polymer coating for controlled release of hydrophobic functional molecules from cotton fabrics, Application In Synthesis of 7575-23-7, the main research area is biodegradable polymer coating cotton fabrics hydrophobic functional mol.

Abstract: Despite major advances in polymer chem., cotton still remains the principal textile component in the global pharmaceutical industry owing to its intrinsic strength, thermal stability, biocompatibility, and pleasant texture. Nevertheless, the hydrophilic nature of cotton requires the development of strategies for the incorporation of hydrophobic functional mols. into the fabric for controlled-release applications. To address this issue, we designed biodegradable crosslinked poly(β-amino ester) (PBAE) coatings as reservoirs for the incorporation of small hydrophobic mols. and studied their release profiles under physiol. conditions. Two PBAEs with different hydrophobic and degradation properties were prepared and crosslinked to cotton fabrics in the presence of azulene, which served as a model hydrophobic, active material. Optimization of the crosslinking process in terms of UV curing time and the amount of solvent revealed that curing time of 15 min using 0.5 mL of chloroform was the optimal crosslinking condition. The coatings were characterized by FTIR, XPS, and SEM as well as TGA and DSC analyses. Sustained release of azulene was observed, and there was a correlation between azulene delivery rates and the hydrophobicity of the coating. These results provide a potentially useful platform for the rational design of cotton-based controlled-release systems for bioactive mol. delivery applications.

Journal of Coatings Technology and Research published new progress about Azulenes Role: SPN (Synthetic Preparation), PREP (Preparation). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application In Synthesis of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Moradi, Sasan published the artcileAchieving high thermal conductivity in epoxy composites: effect of boron nitride particle size and matrix-filler interface, Quality Control of 7575-23-7, the main research area is boron nitride epoxy composite thermal conductivity particle size interface; boron nitride; differential scanning calorimetry (DSC); epoxy; thermal conductivity; thiol.

For the thermal management of high watt d. circuit layers, it is common to use a filled epoxy system to provide an elec. insulating but thermally conducting bond to a metal substrate. An epoxy-thiol system filled with boron nitride (BN), in the form of 2, 30 and 180μm platelets, has been investigated with a view to achieving enhanced thermal conductivity The effect of BN content on the cure reaction kinetics has been studied by differential scanning calorimetry and the thermal conductivity of the cured samples has been measured by the transient hot bridge method. The heat of reaction and the glass transition temperature of the fully cured samples are both independent of the BN content, but the cure reaction kinetics is systematically affected by both BN content and particle size. These results can be correlated with the thermal conductivity of the cured systems, which is found to increase with both BN content and particle size. For a given BN content, the thermal conductivity found here is significantly higher than most others reported in the literature; this effect is attributed to a Lewis acid-base interaction between filler and matrix.

Polymers (Basel, Switzerland) published new progress about Epoxy resins Role: RCT (Reactant), RACT (Reactant or Reagent). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Quality Control of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ding, Meng published the artcileOrderly MOF-Assembled Hybrid Monolithic Stationary Phases for Nano-Flow HPLC, Category: alcohols-buliding-blocks, the main research area is MOF assembled hybrid monolithic stationary phasesnano flow HPLC.

We report an approach that polymerizable handle-modified nanosized metal organic frameworks (MOFs) are used as independent monomers to be covalently organized by crosslinking mols. (CLMs) into an orderly MOF-assembled hybrid monolithic stationary phase, overcoming the resp. problems of previously reported MOF-mixed or embedded stationary phases so far. It has a hierarchical micro-, meso-, and macropore structure throughout the monolithic matrix that is donated from MOF themselves, formed via CLM crosslinking in-between MOFs and expended by porogenic solvents, and a tunable surface chem. derived inherently from MOFs, regulated by CLMs and initiated by the mobile phases as well. Such a pore structure and surface chem. display multiplex interactions of sieving and electrostatic repulsion in addition to the polarity-based interactions that synergistically govern the partitioning way and degree of target mols. between the stationary and mobile phases, thus offering the ability to simultaneously sep. small and large mols. during one chromatog. run on a nano-flow capillary high-performance liquid chromatog. platform. A baseline mutual separation with the HETP and Rs of, for example, 9.2 μm butylbenzene and 4.56 (butylbenzene and pentylbenzene), 7.9 μm (phenylalanine) and 3.50 (tryptophan and phenylalanine), and 7.0 μm (myoglobin) and 1.91 (bovine serum albumin and myoglobin) was achieved when UiO-66/NH-methacrylate was exemplified as a model of MOFs and 1,6-hexanediol dimethacrylate and stearyl methacrylate together as CLMs. Not limited to the MOFs and CLMs demonstrated here, other available MOFs and CLMs or newly designed and synthesized ones are expected to be used for constructing one′s own desired monolithic stationary phases toward her/his particular purposes.

Analytical Chemistry (Washington, DC, United States) published new progress about Bovine serum albumin Role: ANT (Analyte), ANST (Analytical Study). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ofner, Alessandro published the artcileControlled Massive Encapsulation via Tandem Step Emulsification in Glass, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is encapsulation tandem step emulsification glass.

Controlled encapsulation is important in pharmaceutics, agriculture, food products, and in emerging materials applications. Microfluidics offers a compelling approach to create controlled emulsions and microcapsules for these applications, but upscaling of this technol. for the robust encapsulation of chem. diverse active ingredients is not yet demonstrated. Microfluidic step emulsification can be exploited in upscaled glass devices to robustly produce monodisperse double emulsions and functional microcapsules in tandem at high throughput rates. The effect of geometrical parameters of the devices and the operating flow rates on the morphol., dimensions, and structure of monodisperse double emulsions is investigated and quantified using simple quant. models. Using such double emulsions as templates, mechanoresponsive microcapsules that can be embedded in a soft matrix to generate damage-reporting polymer parts that change color in areas subjected to excessive mech. loads are created. Thanks to the chem. versatility and mech. robustness of glass, this platform should enable the high-throughput encapsulation of a wide variety of chems. while providing the exquisite control achievable through microfluidics.

Advanced Functional Materials published new progress about Acrylic polymers Role: RCT (Reactant), RACT (Reactant or Reagent). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Liu, Fangbei published the artcilePhotoresponsive Azobenzene-Functionalized Shell Cross-Linked Micelles for Selective Asymmetric Transfer Hydrogenation, Quality Control of 7575-23-7, the main research area is arylethanone SCM azobenzene catalyst enantioselective asym transfer hydrogenation; arylethanol preparation.

Described the substrate-selective asym. transfer hydrogenation of aromatic ketones using rhodium complexes immobilized on a photoresponsive nanoreactor. The nanoreactor switches its morphol. upon light irradiation in a wavelength-selective manner. Kinetic studies showed that the gated behavior in the crosslinking layer was key to discriminating among substrates and reagents during catalysis. Under UV light irradiation, the nanoreactor displayed substrate selectivity, converting smaller ketone substrates faster to the corresponding secondary alcs.

Organic Letters published new progress about Aralkyl alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Quality Control of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Li, Zhi-Yun published the artcilePayne Effect and Weak Overshoot in Rubber Nanocomposites, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is rubber nanocomposite Payne effect rheol property.

Payne effect and its associated weak overshoot are of importance for understanding and regulating the softening of rubber nanocomposites under large amplitude oscillations. Herein, Payne effect in diverse filled vulcanizates is investigated for generalizing the common characteristics. Master curves of strain amplitude dependent storage modulus are created with respect to microscopic strain amplitude of the matrix, revealing a matrix-dominated elastic nonlinearity being independent of type and dispersity of filler, crosslinking d. and sol fraction of matrix and filler-rubber interfacial interactions. However, carbonaceous fillers with higher affinity to the rubber matrixes yield lower strain amplification and higher overshoot behavior in comparison with siliceous silica. The investigation would be illuminating for preparing rubber nanocomposites with optimized reinforcement and softening performances.

Chinese Journal of Polymer Science published new progress about Carbon black Role: MOA (Modifier or Additive Use), USES (Uses) (N 330). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Elbelazi, Asma published the artcileDevelopment of a homogenous assay based on fluorescent imprinted nanoparticles for analysis of nitroaromatic compounds, Quality Control of 7575-23-7, the main research area is nitroarom compound fluorescent imprinted nanoparticle homogenous assay.

Herein we describe the development of a homogeneous assay for the detection of 4-nitroaniline (4-NA) and 2,4-dinitroaniline (2,4-diNA). This assay relies on fluorescent molecularly imprinted nanoparticles (nanoMIPs) which, upon interaction with the target analytes, generate a reduction in fluorescence emission intensity (quenching). This is due to a responsive fluorescent monomer (N-2-propenyl-(5-dimethylamino)-1-naphthalene sulfonamide) employed in the manufacture of the nanoMIPs which, by virtue of the imprinting process, is capable of selective interaction with the target analyte, thus giving rise to a quenching effect. Selectivity experiments showed excellent recognition properties toward the target mol. Under optimal conditions, the fluorescence intensity of these nanoMIPs decreased as the concentration of the imprinted analyte increased from 10 nM to 2.71 μM. A linear relation between the neg. logarithm of 4-NA or 2,4-diNA concentrations and the fluorescence intensity for both nanosystems was found (R2 = 0.991 and R2 = 0.9895), with excellent sensitivity (limit of detection (LOD) = 7 and 6 nM, resp.). Furthermore, both nanosystems have been successfully applied for detection of 4-NA or 2,4-diNA in tap water, with recoveries between 90% to 100.6% and 92% to 100.3%, resp. Thanks to the versatility of the imprinting process, this nanosystem holds the potential for further development of several optical sensors for many other compounds [Figure not available: see fulltext.]

Nano Research published new progress about Aromatic nitro compounds Role: ANT (Analyte), ANST (Analytical Study). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Quality Control of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts