Category: 15625-89-5

Huang, Yugang published the artcileBis(trimethylsilyl)amino modified Type II photoinitiators can alleviate oxygen inhibition of near-UV LED photopolymerization due to moisture induced decomposition of initiators, COA of Formula: C15H20O6, the publication is European Polymer Journal (2022), 111236, database is CAplus.

Near UV-LED photopolymerization of acrylates can find many crucial applications in industrial fields, such as coatings, adhesives and 3D printing of hydrogels. However, developing the photoinitiators (PIs) well matching with the com. LED light sources and reducing oxygen inhibition effect remain challenges. Herein, we have synthesized three kinds of type II PIs containing bis(trimethylsilyl)amino groups; Molar extinction coefficients of these PIs are all at the 10³ ∼ 10⁴ (L·mol^-1·cm^-1) order of magnitude at the 365 ∼ 395 nm, comparable to the com. PIs including Michler’s ketone (MK) and 2-isopropylthioxanthone (ITX); However, their photoinitiation capacity is much better than the MK and the ITX. In addition, these PIs have better resistance to the oxygen inhibition effect than the MK. Some researchers think the PIs containing rich Si/F elements can self-migrate towards upper layers of curing systems to reduce the oxygen inhibition effect, however, these obtained PIs with high Si fraction did not have such effect. Based on the obtained exptl. results, we have proposed a new mechanism explaining their good ability to reduce the oxygen inhibition: The moisture induced decomposition of the initiators can play a key role in alleviating the oxygen inhibition; The generated Si-containing fragments after PIs’ hydrolysis can self-float towards the top surfaces to hinder the oxygen penetration, not the self-floating effect of the PIs by themselves.

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 C15H20O6, COA of Formula: C15H20O6.

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

Meng, Jiali published the artcileCrown fit and dimensional accuracy of zirconia fixed crowns based on the digital light processing technology, Quality Control of 15625-89-5, the publication is Ceramics International (2022), 48(12), 17852-17863, database is CAplus.

Zirconia is extensively used for manufacturing dental prostheses because of its superior mech. properties. The idea of using 3D printing to manufacture zirconia dental prostheses has gradually become popular, but printing accurate shapes and obtaining excellent dimensional accuracy still remain challenging. In this study, the optimal curing parameters and shrinkage ratios of zirconia slurry were investigated using a multi-angle model and a standard fixed crown model. Then the dimensional accuracy and crown fit were investigated, and the fixed crown and fixed bridge were fabricated by using digital light processing (DLP) technol. Further, the dimensional accuracy and crown fit were investigated. The results showed that the optimal curing parameters and enlargement factors for zirconia fixed crown printing were 80 PWM (light source power), 2s (curing time) and 1.400, 1.400, 1.500 (in X, Y, Z directions), resp. The internal fit was 239.3 ± 7.9 μm, which met the clin. criteria (≤300 μm), whereas the marginal fit was 128.1 ± 7.1 μm, which was extremely close to the clin. criteria (≤120 μm). For dimensional accuracy, the standard error of sintered fixed crown was 0.14 ± 0.06 mm, and the boundary dimensional accuracy and anatomical landmark points′ dimensional accuracy were also investigated. In addition, the d. of sintered zirconia was 6.01 ± 0.02 g/cm³. From the results of this study, it could be found that the crown fit of zirconia fixed crowns printed using the DLP technique could be close to clin. standards, although there is still a gap with the zirconia fixed crowns from the milling technique. In addition incomplete removal of the support structures have a neg. impact on dimensional accuracy, hence it is necessary to further explore the optimization strategies of the support structures for improving the dimensional accuracy of fixed crowns printed by DLP.

Ceramics International 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, Quality Control of 15625-89-5.

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

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 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

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

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

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

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

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