Tag: M.W=250-300

Wu, YinPing published the artcileStudy on bifunctional acyldiphenylphosphine oxides photoinitiator for free radical polymerization, Product Details of C15H20O6, the publication is European Polymer Journal (2022), 111093, database is CAplus.

Three novel bifunctional acylphosphineoxide compounds containing diallyl amino group were designed and synthesized as photoinitiators for free radical photopolymerization (FRP) of acrylates. Firstly, the photoinitiation properties of DABPOs (DABPO-1, DABPO-2 and DABPO-3), including their UV-vis spectra, the migration after curing and the solubility in monomers, have been studied and compared with com. photoinitiator 2,4,6-trimethyl(phenyl)diphenyl oxide (TPO). The results show that DABPOs have the red-shift absorption wavelength, higher molar absorption coefficient, lower migration and higher solubility comparing with TPO, and they have higher double bond conversion (DC) in TMPTA monomer than TPO under the exposure of 420 nm. Secondly, DABPOs have been successfully used as co-initiator in H-extraction photocuring system. The results show that diallyl amino acylphosphine oxides are effective bifunctional photoinitiators for photopolymerization under LED irradiation

European Polymer Journal published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C27H23F6NO6S, Product Details of C15H20O6.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Wu, YinPing published the artcileNew acyl phosphine oxides as high-performance and low migration type I photoinitiators of radical polymerization, Application of Trimethylolpropane triacrylate, the publication is Progress in Organic Coatings (2022), 106876, database is CAplus.

Two low migration acylphosphine oxide photoinitiators (APO and DAPO) containing unsaturated C=C double bonds have been designed and synthesized for free radical polymerization The properties and performances of APO and DAPO in the free radical polymerization of trimethylolpropane triacrylate (TMPTA) were evaluated and compared with the com. photoinitiator 2,4,6-trimethyl(phenyl) di-Ph oxide (TPO). The results show that DAPO exhibited the best double bond conversion (DC) of TMPTA in the photoinitiators tested under the same reaction conditions. The migration ratio of APO and DAPO was 2/3 and 1/3 of that of TPO resp. indicating lower migration than the conventional photoinitiator, and the solubility of DAPO in monomers was close to that of TPO, which provided the possibility for the industrial application of DAPO.

Progress in Organic Coatings published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C14H23N, Application of Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Wu, YinPing published the artcileA new carbazolyl-based acylphosphine oxide photoinitiator with high performance and low migration, Category: esters-buliding-blocks, the publication is Journal of Polymer Science (Hoboken, NJ, United States) (2022), 60(1), 52-61, database is CAplus.

In order to obtain a new photoinitiator with high efficiency, low migration, and high solubility in acrylate monomers, a new compound named 9-allyl-9H-carbazol-3-yldipenylphosphine oxide (ALPO) was designed and synthesized. Compared to 9-ethyl-9H-carbazol-3-yldipenylphosphine oxide, the double bond conversion (DC) and solubility of ALPO in acrylic monomers were greatly improved, and the migration rate was greatly reduced after replacing the Et group in the mol. with an allyl group. Compared with (2,4,6-trimethylbenzoyl) diphenylphosphine oxide (TPO), which was widely used com., ALPO had a higher DC and lower migration rate. This means that ALPO may be able to replace TPO in the light curing field.

Journal of Polymer Science (Hoboken, NJ, United States) published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C10H10N2, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Yu, Shuangjian published the artcileExtrudable Vitrimeric Rubbers Enabled via Heterogeneous Network Design, Product Details of C15H20O6, the publication is Macromolecules (Washington, DC, United States) (2022), 55(8), 3236-3248, database is CAplus.

The state-of-the-art reprocessing of vitrimers still struggles in crude hot-compression processes. The highly cross-linked nature and glass-like viscoelastic behavior of vitrimers critically restrict the network chain mobility, which limits the application of continuous processing techniques during reprocessing. Herein, a multiphase design strategy is outlined through incorporating highly cross-linked vitrimeric powders into a polymer matrix, followed by crosslinking with dynamic covalent bonds (DCBs) containing cross-linkers to form multiphase DCB-based networks. Accordingly, inhomogeneous stress distribution can be achieved inside the networks during deforming. The resulting high interfacial stress significantly accelerates the network relaxation upon mech. activation enabling extrudable reprocessability to the vitrimeric rubbers with ~100% recovery of overall performance. Moreover, the inhomogeneous stress distribution also promotes the chain orientation of the networks, leading to a remarkably mech. reinforcement of the samples without compromising the elasticity. We envisage that this design concept can indeed facilitate the vitrimers toward industrial applications, which is significant to the sustainable development of rubber industry.

Macromolecules (Washington, DC, United States) published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C8H15NO, Product Details of C15H20O6.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhao, Bowen published the artcileXanthate-Based Photoiniferter RAFT Polymerization toward Oxygen-Tolerant and Rapid Living 3D Printing, Related Products of esters-buliding-blocks, the publication is Macromolecules (Washington, DC, United States) (2022), 55(5), 1620-1628, database is CAplus.

Three-dimensional (3D) printing based on photoinduced reversible addition-fragmentation chain transfer (RAFT) polymerization is emerging as a versatile and powerful method to prepare “living” 3D objects, which can be postmodified with various functionalities. However, an addnl. photoinitiator or photocatalyst is necessary in these systems, which is toxic and will cause neg. effects on the properties of the prepared materials. Here, we report oxygen-tolerant and rapid living 3D printing based on photoiniferter RAFT polymerization, which does not need addnl. photoinitiators or photocatalysts. A xanthate, O-ethyl-S-2-Et propionate, was chosen as both the photoinitiator and RAFT agent in this process. Various monomers and RAFT agents were screened in this system. Materials with different properties were prepared utilizing the postfunctionalization of the printed living objects. Furthermore, a polymer welding method was proposed by painting fresh monomers between two living objects for post-photocuring. This photoiniferter RAFT polymerization-based living 3D printing method was also successfully applied to a com. digital light processing technique-based 3D printer, offering a facile method to fabricate living 3D materials with different shapes.

Macromolecules (Washington, DC, United States) published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C7H8BNO4, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Lin, Jui-Teng published the artcileEfficacy modeling of new multi-functional benzophenone-based system for free-radical/cationic hybrid-photopolymerization using 405 nm LED, Application In Synthesis of 15625-89-5, the publication is Journal of Polymer Research (2022), 29(3), 100, database is CAplus.

This article presents, for the first time, the kinetics and the general conversion features of a 3-component system, benzophenone-triphenylamine(BT)/iodonium/Amine, based on proposed mechanism of Liu et al., for both free radical polymerization (FRP) of acrylates and the free radical promoted cationic polymerization (CP) of epoxides using the new multi-functional initiator of BT. The additives, iodonium and amine, Et 4-(dimethylamino)benzoate (EDB), have the dual function of (i) regeneration BT and (ii) produce of extra radicals for improved FRP and CP. Analytic formulas are developed to explore the new features including: (i) the conversion efficacy (CE) of FRP is an increasing function of the light intensity, the effective absorption coefficient, and the concentration sum of each of the components, BT, Iod, amine, for transient state. However, CE at steady-state is independent to the light intensity; (ii) the trifunctional hybrid structures of BT3 leads to larger light absorption than other types of BT; it also provides more active sites for the H-abstraction in the presence of EDB, leading to high CE; (iii) the efficacy of FRP is an increasing function of the amine (EDB) concentration, in contrast to that of CP having an opposite dependence; (iv) the consumption rate of BT3 in the BT3/Iod/EDB system is slower than that of the BT3/Iod system due to photoredox catalytic cycle, and the larger initiator regeneration (RGE)in the three-component system.

Journal of Polymer Research published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Application In Synthesis of 15625-89-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Lin, Jui-Teng published the artcileModeling the Enhanced Efficacy and Curing Depth of Photo-Thermal Dual Polymerization in Metal (Fe) Polymer Composites for 3D Printing, SDS of cas: 15625-89-5, the publication is Polymers (Basel, Switzerland) (2022), 14(6), 1158, database is CAplus and MEDLINE.

This article presents, for the first time, the efficacy and curing depth anal. of photo-thermal dual polymerization in metal (Fe) polymer composites for 3D printing of a three-component (A/B/M) system based on the proposed mechanism of our group, in which the co initiators A and B are Irgacure-369 and charge-transfer complexes (CTC), resp., and the monomer M is filled by Fe. Our formulas show the depth of curing (Zc) is an increasing function of the light intensity, but a decreasing function of the Fe and photoinitiator concentrations Zc is enhanced by the additive [B], which produces extra thermal radical for polymerization under high temperature The heat (or temperature) increase in the system has two components: (i) due to the light absorption of Fe filler and (ii) heat released from the exothermic photopolymerization of the monomer. The heat is transported to the additive (or co-initiator) [B] to produce extra radicals and enhance the monomer conversion function (CF). The Fe filler leads to a temperature increase but also limits the light penetration, leading to lower CF and Zc, which could be overcome by the additive initiator [B] in thick polymers. Optimal Fe for maximal CF and Zc are explored theor. Measured data are analyzed based on our derived formulas.

Polymers (Basel, Switzerland) published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, SDS of cas: 15625-89-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Burehardt, George Norman published the artcileArylsulfuric acids, Recommanded Product: Potassium 4-nitrophenyl sulfate, the publication is Journal of the Chemical Society (1926), 684-90, database is CAplus.

CISO₂H (34 g.) run into a mixture of 100 g. PhNEt₂ (or PhNMe₂) in 100 cc. CS₂ at not over 10° and then treated with 25 g. PhOH in 50 cc. CS₂ gives, after treatment with a mixture of NaOH and Ba(OH)₂, 90% of NaPhSO₄, the PhNEt₂ being readily recovered. If the base and PhOH are mixed before the ClSO₂H is added the yield never exceeds 60%. If 19 g. SO₃ in 80 cc. liquid SO₂ is added to 20 g. PhOH and 60 g. PhNEt₂ with cooling, there results 60% of NaPhSO₄. p-O₂NC₆H₄OH (30 g.) added to 25 g. SO₂ and 29 g. C₅H₅N in 200 cc. boiling C₆H₆ gives 90-4% K p-nitrophenyl sulfate. Eugenol gives 70% of the sulfate. o-O₂NC₆H₄OH reacts less readily and gives 25% of the sulfate with an equivalent amount of reagent, 56% with twice the theory. PhOH and PhNEt₂ give 80-5% KPhSO₄ with 1.5 mols. K₂S₂O₇, 90% with 2 mols. The alkali salts of arylsulfuric acids are stable at 100° in neutral aqueous solution and require heating to boiling before rapid hydrolysis sets in in the presence of mineral acids. The Ba salt is decomposed by heating to 100° in H₂O for 1.5 hrs., after which hydrolysis proceeds rapidly to completion in 2 hrs. The NH₄ and Mg salts are of intermediate stability. All the salts are stable at 100° in aqueous AcONa, even in the presence of a considerable amount of AcOH. Hydrolysis of the K salt is also brought about by heating at 150° with strong alkali or with half concentrated NH₄OH at 190-220° for 4 hrs. K phenyl sulfate, rhombohedral or 6-sided plates with apex angle 95°, solubility in EtOH at 17° 0.7%, in H₂O 14%. Na salt, rhombic plates with 3H₂O, solubility in EtOH at 17°, 7%, in H₂O 31%. Ba salt, fine granules, solubility in EtOH 15%. The solubility of K o-tolyl sulfate in H₂O at 17° is 22%, of the m-derivative, 9%; of the p-derivative, 10%. p-Toluidine tolyl sulfates are characteristic. The o-cresol salt, m. 125-7° (decomposition), the p-cresol salt, 149-51°. Oxidation of K m-tolyl sulfate with KMnO₄ gives 80% of K m-carboxyphenyl sulfate, plates, 3.2 parts dissolving in 100 parts H₂O at 17°. K α-naphthyl sulfate, long needles, soluble in 40 parts. H₂O at 17°; the β-salt crystallines with 4H₂O and dissolves in 70 parts H₂O at 17°. Their oxidation was studied but definite products were not isolated.

Journal of the Chemical Society published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C6H4KNO6S, Recommanded Product: Potassium 4-nitrophenyl sulfate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Nasir, Naila published the artcileEffect of the Photoinitiator Concentration on the Electro-optical Properties of Thiol-Acrylate-Based PDLC Smart Windows, Related Products of esters-buliding-blocks, the publication is ACS Applied Energy Materials (2022), 5(6), 6986-6995, database is CAplus.

Polymer-dispersed liquid crystals (PDLCs), an indispensable class of elec. switchable materials, where nano- or microsized liquid crystal (LC) droplets are phase-separated from the polymer matrix, have been widely used in the fabrication of highly efficient and systematic smart windows. In this paper, we explored the effect of the photoinitiator concentration on the morphol. and electro-optical properties of PDLC films based on thiol and acrylates. We prepared PDLC films using various concentrations of the photoinitiator, while keeping the concentrations of LC and monomers constant We observed that the concentration of the photoinitiator directly influences the phase separation process, which in turn determines the morphol. and electro-optical characteristics of the PDLC film. Thus, an optimized amount of the photoinitiator is required to prepare PDLC films with high transmittance and low switching time, haze, and power consumption. The optimized photoinitiator concentration can have a transmittance ΔT (difference between on- and off-state transmittances) of >85% at a low driving voltage.

ACS Applied Energy Materials published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Hansen, Hanne D. published the artcileSynthesis, radiolabeling and in vivo evaluation of [¹¹C](R)-1-[4-[2-(4-methoxyphenyl)phenyl]piperazin-1-yl]-3-(2-pyrazinyloxy)-2-propanol, a potential PET radioligand for the 5-HT₇ receptor, Recommanded Product: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, the publication is European Journal of Medicinal Chemistry (2014), 152-163, database is CAplus and MEDLINE.

In the search for a novel serotonin 7 (5-HT₇) receptor PET radioligand we synthesized and evaluated a new series of biphenylpiperazine derivatives in vitro. Among the studied compounds, (R)-1-[4-[2-(4-methoxyphenyl)phenyl]piperazin-1-yl]-3-(2-pyrazinyloxy)-2-propanol, showed the best combination of affinity, selectivity, and lipophilicity, and was thus chosen for carbon-11 labeling and evaluation in pigs. After i.v. injection, compound I entered the pig brain and displayed reversible tracer kinetics. Pretreatment with the 5-HT₇ receptor selective antagonist SB-269970 resulted in limited decrease in the binding of I, suggesting that this radioligand is not optimal for imaging the brain 5-HT₇ receptor in vivo but it may serve as a lead compound for the design of novel 5-HT₇ receptor PET radioligands.

European Journal of Medicinal Chemistry published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C9H9NO6S, Recommanded Product: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics