Tag: M.W=400-500

Jeong, Changyoon published the artcileReal-time in situ monitoring of manufacturing process and CFRP quality by relative resistance change measurement, Quality Control of 7575-23-7, the main research area is CFRP manufacturing process in situ monitoring sensor elec resistance.

In situ monitoring of resin flow, impregnation of carbon fiber fabrics, and curing during composite manufacturing are very important for determining the quality of composite parts. In conventional methods, sensors, such as optical fibers and strain gages, are bonded to or embedded in the composites for measuring the changes in mech. and chem. properties. Although they can detect resin curing behavior and impregnation of carbon fibers, they may adversely affect the manufacturing process or structural integrity of the composites. In this study, carbon fiber itself was used as a sensor that minimizes the degradation of mech. properties and increases the efficiency of monitoring the manufacturing process. The change in the elec. resistance of carbon fiber fabrics was monitored during the various manufacturing processes when the resin flowed through the carbon fiber fabric and curing progressed. The effectiveness of this monitoring method was confirmed, and it is expected to be applicable in monitoring the quality of the finished composite parts.

Polymer Testing published new progress about Cables and Wires. 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

Kiiski, Iiro published the artcileThe material-enabled oxygen control in thiol-ene microfluidic channels and its feasibility for subcellular drug metabolism assays under hypoxia in vitro, Formula: C17H28O8S4, the main research area is thiolene microfluidic channel subcellular drug metabolism hypoxia oxygen control.

Tissue oxygen levels are known to be critical to regulation of many cellular processes, including the hepatic metabolism of therapeutic drugs, but its impact is often ignored in in vitro assays. In this study, the material-induced oxygen scavenging property of off-stoichiometric thiol-enes (OSTE) was exploited to create physiol. relevant oxygen concentrations in microfluidic immobilized enzyme reactors (IMERs) incorporating human liver microsomes. This could facilitate rapid screening of, for instance, toxic drug metabolites possibly produced in hypoxic conditions typical for many liver injuries. The mechanism of OSTE-induced oxygen scavenging was examined in depth to enable precise adjustment of the on-chip oxygen concentration with the help of microfluidic flow. The oxygen scavenging rate of OSTE was shown to depend on the type and the amount of the thiol monomer used in the bulk composition, and the surface-to-volume ratio of the chip design, but not on the phys. or mech. properties of the bulk. Our data suggest that oxygen scavenging takes place at the polymer-liquid interface, likely via oxidative reactions of the excess thiol monomers released from the bulk with mol. oxygen. Based on the kinetic constants governing the oxygen scavenging rate in OSTE microchannels, a microfluidic device comprising monolithically integrated oxygen depletion and IMER units was designed and its performance validated with the help of oxygen-dependent metabolism of an antiretroviral drug, zidovudine, which yields a cytotoxic metabolite under hypoxic conditions.

Lab on a Chip published new progress about Antiviral agents. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Formula: C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yuan, Jialiang published the artcileAn integrated cathode and solid electrolyte via in situ polymerization with significantly reduced interface resistance, Category: alcohols-buliding-blocks, the main research area is PVDF HFP battery cathode solid electrolyte thermal stability.

Reducing the interfacial resistance between solid electrolytes and electrodes is critical for developing high-energy d. solid-state batteries. In the present study, a simple strategy of designing an integrated cathode and solid electrolyte (ICSE) to avoid a contact interface is proposed and successfully fulfilled with the help of UV curving. Firstly, a porous polymer film (PVDF-HFP/PVDF) was formed on the surface of the porous LiFePO4 electrode via PVP dissolution Secondly, curable monomers, including PEGDA/PETMP/TFEMA, were filled into the porous membrane via infiltration and concentration Lastly, the ICSE was obtained via curing with UV light. The as-prepared LiFePO4//ICSE//Li solid battery displays excellent electrochem. performance with a high reversible capacity of 153 mA h g-1 and a capacity of over 140 mA h g-1 was retained after 150 cycles at 0.1C and 25°C. This ICSE strategy may effectively contribute to the practical application of all-solid-state batteries.

Chemical Communications (Cambridge, United Kingdom) published new progress about Battery cathodes. 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

Chen, Hongyan published the artcileImproving the Physical-Mechanical Property of Dental Composites by Grafting Methacrylate-Polyhedral Oligomeric Silsesquioxane onto a Filler Surface, Synthetic Route of 7575-23-7, the main research area is dental composite methacrylate polyhedral oligomeric silsesquioxane filler surface; MA-POSS; dental resin composite; hybrid particles; interfacial interaction; physical−mechanical property.

Endowing dental composites with excellent interfacial bonding through filler surface modification is pivotal to improve the phys.-mech. property and prolong the life of composite fillings. In this study, methacrylate-polyhedral oligomeric silsesquioxane (MA-POSS) acts as a “”mol. bridge”” between the commonly used SiO2 particles and the methacrylate-based resin matrix via a thiol-ene click reaction to construct MA-POSS/SiO2 (p-SiO2) hybrid particles. Synthesized p-SiO2 exhibited the roughest surface morphol. and had more polymerizable groups, in comparison with SiO2 and silanized SiO2. Furthermore, the p-SiO2 particles were used as a reinforcement to fabricate bisphenol A glycerolate dimethacrylate/tri(ethyleneglycol) dimethacrylate-based dental composites, where the SiO2- and silanized SiO2-filled composites served as the control groups, and the filler loading was fixed at 65 weight %. Results of the mech. properties indicated that the hybrid p-SiO2 particles significantly improved the flexural strength, flexural modulus, compressive strength, and work of fracture of dental composites, giving improvements of 251.2, 17.89, 122.3, and 1094%, resp., over the SiO2-filled composites due to the strong interfacial interaction between the resin matrix and p-SiO2. Addnl., this optimal p-SiO2-loaded composite also presented better polymerization shrinkage, acceptable degree of conversion, curing depth, and cell viability. Grafting of MA-POSS onto a filler surface is a promising filler surface modification to improve the resin matrix/filler interfacial interaction, leading to the enhanced overall performance of composites.

ACS Biomaterials Science & Engineering published new progress about Bending strength. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Synthetic Route of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Boxue published the artcileResearch on electrospinning thermosetting-thermoplastic core-shell nanofiber for rapid self-healing of carbon fiber/epoxy composites, Computed Properties of 7575-23-7, the main research area is thermosetting thermoplastic core shell nanofiber carbon fiber epoxy composite; electrospinning mech self healing property.

This work fabricated rapid self-healing carbon fiber/epoxy composites based on the thermosetting-thermoplastic core-shell nanofiber to improve the healing efficiency and healing responsiveness of self-healing composites. The core-shell nanofiber was prepared by coaxial electrospinning on the premise that the melting temperature of thermoplastic copolyamide (PA) shell matched the curing temperature of encapsulated epoxy healing agent. Upon interlaminar fracture, the melting PA shell ruptured and released all core at healing temperature The thermal expansion of PA provided an addnl. driving force for healing. Therefore, the core-shell acted together as healing agent and rapidly fill the damaged region, realizing the full healing potential. The incorporation of core-shell nanofiber enhanced the bending strength by 16.11%, and the damaged composites achieved 89.96% recovery after healing for 20 min at 130 °C. The delamination surfaces showed the toughening and healing mechanisms of core-shell nanofiber. Moreover, the effect of deposition time on healing efficiency was discussed in detail.

Composites Science and Technology published new progress about Bending strength. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Computed Properties of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Li published the artcileDelayed Thiol-Epoxy Photopolymerization: A General and Effective Strategy to Prepare Thick Composites, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is delayed thiol epoxy photopolymerization thick nanocomposite prpen.

Photoinduced thiol-epoxy click polymerization possesses both the characteristics and advantages of photopolymerization and click reactions. However, the photopolymerization of pigmented or highly filled thiol-epoxy thick composites still remains a great challenge due to the light screening effect derived from the competitive absorption, reflection, and scattering of the pigments or functional fillers. In this article, we present a simple and versatile strategy to prepare thick composites via delayed thiol-epoxy photopolymerization The irradiation of a small area with a light-emitting diode (LED) point light source at room temperature leads to the decomposition of a photobase generator and the released active basic species can uniformly disperse throughout the whole system, including unirradiated areas, via mech. stirring. No polymerization was observed at room temperature and therefore the liquid formulations can be further processed with molds of arbitrary size and desired shapes. It is only by increasing the temperature that base-catalyzed thiol-epoxy polymerization occurs and controllable preparation of thick thiol-epoxy materials can be achieved. The formed networks display excellent uniformity in different radii and depths with comparable functionality conversions, similar Tg values, and thermal decomposition temperatures The presented strategy can be applied to prepare thick composites with glass fibers possessing improved mech. properties and dark composites containing 2 weight % carbon nanotubes.

ACS Omega published new progress about Bending strength. 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

Zhang, Jing published the artcileCross-Linked Reverse Vesicle as a General and Effective Vehicle for Hydrophobic Drugs, Quality Control of 7575-23-7, the main research area is crosslinking drug carrier antitumor.

It is well-known that vesicles serve as an excellent delivery platform for hydrophilic drugs. However, there is still a lack of a general and effective platform for hydrophobic drug loading. We herein disclose that water-soluble cross-linked reverse vesicles (cRVs) constructed from anionic surfactant 1, a counterpart of normal vesicles, would be excellent vehicles for hydrophobic drugs, the drug loading content (DLC) for which arrived up to 21.1%, 19.8%, and 25.8%, resp., for three anticancer drugs, paclitaxel, camptothecin, and carmofur. This represents a general drug carrier with high drug loading content for various hydrophobic drugs without the assistance of other external forces. In addition to drug loading superiority, the cRVs were also characterized by robust stability, specific stimulus response, easy postfunctionalization, and good biocompatibility and thus are promising candidates for drug delivery systems.

Langmuir published new progress about Antitumor agents. 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

Yu, Yue published the artcileLight-driven core-shell fiber actuator based on carbon nanotubes/liquid crystal elastomer for artificial muscle and phototropic locomotion, Synthetic Route of 7575-23-7, the main research area is carbon nanotube liquid crystal elastomer artificial muscle actuator.

Soft actuators controlled by untethered methods have aroused growing attention on account of their flexibility and controllability. Soft actuators shaped in a one-dimensional structure are highly desired in diverse practical applications. In this paper, we fabricate a new core-shell CNTs@LCE fiber soft actuator made of a liquid crystal elastomer (LCE) fiber coating with carbon nanotubes (CNTs) shell. Thanks to the outstanding photothermal conversion capacity of CNTs and remarkable thermal-contraction characteristic of LCE, the obtained core-shell CNTs@LCE fiber actuator can be controlled by near-IR light with excellent phototropic bending to arbitrary directions, lifting loads more than 4600 times of its own weight and acting as artificial muscle to control the feature of biomimetic elbow and gripper with loads. More intriguingly, the core-shell CNTs@LCE fiber can fulfill unprecedented photo-driven phototropic locomotion including tracking the moving light source, climbing a slanted surface, and optically steering as well. The involved unique photo-driven phototropic movement mechanism has been revealed exptl. and theor., which is highly expected to guide the fabrication of other soft smart fiber actuators for advanced applications.

Carbon published new progress about Actuators (soft). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Synthetic Route of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lu, Hai-Feng published the artcileUltrahigh fatigue resistant liquid crystal elastomer-based material enabled by liquid metal, Application In Synthesis of 7575-23-7, the main research area is acrylic liquid crystal elastomer fatigue resistance mech property.

The low crosslink d. characteristic of liquid crystal elastomer (LCE) materials causes poor fatigue resistance performance, which has seriously plagued their prospects in industrial applications. Here we report that the introduction of 5 wt% liquid metal nanodroplets (average diameter: ca. 195 nm) into the LCE network can dramatically reinforce the corresponding composite’s mech. properties, in particular ultrahigh fatigue resistance, capable of bearing unprecedented 10,000 tensile cycles within a large range of strain amplitude up to 70% and 2000 times of continuous actuating deformations. Furthermore, this liquid metal-incorporated LCE composite material exhibits large actuation stroke (maximum actuation strain: 55%), high actuation stress (blocking stress: 1.13 MPa), fully reversible thermal/photo-actuation functions, and self-healing ability at moderate temperatures, which qualifies the composite material for high-load actuators.

Science China Materials published new progress about Crosslink density. 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

Lau, C. maggie published the artcileStructural Basis for the Different Mechanical Behaviors of Two Chemically Analogous, Carbohydrate-Derived Thermosets, COA of Formula: C17H28O8S4, the main research area is behavior analogous carbohydrate thermoset.

Two renewable, structurally analogous monomers, isosorbide undecenoate (IU) and glucarodilactone undecenoate (GDLU) reacted with pentaerythritol tetrakis(3-mercaptopropionate) (PETT) via thiol-ene photopolymerization to form IU-PETT and GDLU-PETT thermosets. Despite their chem. similarity, uniaxial tensile testing showed that GDLU-PETT exhibited a strain-hardening behavior and is significantly tougher than IU-PETT. To understand this observation, in situ tensile testing and wide- angle X-ray scattering experiments (WAXS) were conducted. While the 2D WAXS patterns of IU-PETT displayed an isotropic halo during uniaxial deformation, they exhibited a change from an isotropic halo to a pair of scattering arcs for the GDLU-PETT samples. D. functional theory calculations further revealed that the alkyl chains on GDLU adopt a linear conformation while the alkyl chains on IU are angled. Based on these results, we postulate that the linear GDLU mols. can more easily order and align during uniaxial deformation, hence increasing intermol. interactions between the GDLU mols. and contributing to the observed strain hardening behavior of their thermosets. This study exemplifies how mols. with subtle differences in their chem. structures can alter the structures and thermophys. properties of the resulting polymers in unpredictable ways.

ACS Macro Letters published new progress about Crosslink density. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, COA of Formula: C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts