Tag: 500-600

Xiong, Linying;Zhang, Yafeng;Wang, Hengxin;Chen, Anhua;Liu, Yong;Peng, Ya published 《Preparation and properties of PI/CCTO@Al₂O₃ composite films》 in 2021. The article was appeared in 《Gongcheng Suliao Yingyong》. They have made some progress in their research.Electric Literature of C31H20O8 The article mentions the following:

A layer of aluminum oxide (Al₂O₃) was coated on the surface of copper calcium titanate (CCTO) by hydrothermal method that could fabricate CCTO@Al₂O₃. The composite films of polyimide (PI)/CCTO@Al₂O₃ were prepared by in-situ polymerization The composite films were characterized by Fourier transform IR spectroscopy, laser particle size analyzer, scanning electron microscope, and their mech. properties, dielec. properties, and thermal stability were tested. The effects of CCTO@Al₂O₃ content on the structures and properties of films were studied and the difference between PI/CCTO@Al₂O₃ and PI/CCTO films were researched. The results showed that CCTO@Al₂O₃ dispersed evenly in PI matrix. When the content of CCTO@Al₂O₃ was 10%, the dielec. constant could increase obviously to 6.95. Compared with PI/CCTO films with the same content of CCTO, the dielec. constant of PI/CCTO@Al₂O₃ composite films increased, the dielec. loss decreased, and the mech. properties and thermal stability were improved. To complete the study, the researchers used 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) .

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.Electric Literature of C31H20O8 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Computed Properties of C31H20O8《Electrochemically active polyimides containing hydroxyl-functionalized triphenylmethane as molecular sensors for fluoride anion detection》 was published in 2020. The authors were Chiriac, Adriana-Petronela;Butnaru, Irina;Damaceanu, Mariana-Dana, and the article was included in《Electrochimica Acta》. The author mentioned the following in the article:

In the challenging pursuit of endowing the high performance polyimide systems with efficient responsive side chains, the authors have designed and synthesized four mol. sensors containing OH group grafted on triphenylmethane (TPM) core as receptor for the fluoride anion. The sensing platforms were obtained by solution polycondensation reaction of a new TPM-based diamine bearing the OH receptor with four ether-dianhydrides containing different substituents, such as 9,9-diphenyl-fluorene, cyclohexane, isopropylidene or hexafluoroisopropylidene. These structural elements are meant to increase the flexibility of the polyimide backbones, as well as solubility and processing ability from easy accessible solvents, while preserving a high thermal stability. Since TPM-OH based polyimides were not studied yet with regard to their photooptical and electrochem. features, the authors have performed a systematic study which highlighted a complex behavior in strong dependence on the surrounding environment. The UV-visible absorption and fluorescence spectra evidenced the occurrence of solute-solvent interactions which are responsible for unusual pink color of these polyimides. Meanwhile, intermol. H bonding evolved in solid state. These features promoted a redox behavior contingent on the polyimides ability to generate the keto tautomer. For the 1st time in the case of polyimides, spectroscopic and electrochem. responses to fluoride anion were thoroughly analyzed by fluorescence and cyclic voltammetry, besides the already known UV-visible and ¹H NMR spectroscopies. Clear changes occurred in the presence of the fluoride anion (with tetrabuthylammonium as the counterion), allowing the authors to discriminate it by other anions. The sensing recognition capability was demonstrated by color change from pink to yellow, fluorescence enhancement and variation from blue to yellowish-green, disappearance of the OH proton signature and easier oxidation in the presence of fluoride anions. Since the acid CH group of TPM core is indirectly entangled in the sensing mechanism of the fluoride anion, different concurrent recognition principles may be considered. Even complex, the sensing behavior of the understudy polyimides proved that a single OH group/monomeric TPM unit is appropriate for efficient fluoride anion recognition.5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) were involved in the experimental procedure.

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.Computed Properties of C31H20O8 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Xu, Zhen;Liu, Tianyu;Cao, Ke;Guo, Dong;Serrano, Joel Marcos;Liu, Guoliang published 《Thermally Stable and Mechanically Strong Mesoporous Films of Poly(ether imide)-Based Triblock Copolymers》 in 2020. The article was appeared in 《ACS Applied Polymer Materials》. They have made some progress in their research.Electric Literature of C31H20O8 The article mentions the following:

Polymer films must be thermally stable and mech. strong to operate durably under extreme conditions (e.g., high temperature and tension). Herein we report the preparation of mesoporous films from poly(4-vinylpyridine)-block-poly(ether imide)-block-poly(4-vinylpyridine) (P4VP-b-PEI-b-P4VP) triblock copolymers. Owing to the high-performance engineering plastic PEI block, the mesoporous films are thermally stable up to 150°C and show much higher mech. strength than existing polystyrene-based films. Importantly, with a mol. weight of 27.7 kDa, the porous block copolymer films showed a tensile strength at break of 10.5 MPa and toughness of 0.68 MPa. The P4VP-b-PEI-b-P4VP films had predominant mesopores of tunable sizes and high sp. surface areas, better than the com. poly(ether sulfone) and polyamide films. The development of poly(ether imide)-based porous films provides an effective method for preparing thermally stable and mech. strong membranes for extreme-condition operations. To complete the study, the researchers used 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) .

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.Electric Literature of C31H20O8 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Bujak, Karolina;Sava, Ion;Stoica, Iuliana;Tiron, Vasile;Topala, Ionut;Weglowski, Rafal;Schab-Balcerzak, Ewa;Konieczkowska, Jolanta published 《Photoinduced properties of “T-type” polyimides with azobenzene or azopyridine moieties》 in 2020. The article was appeared in 《European Polymer Journal》. They have made some progress in their research.COA of Formula: C31H20O8 The article mentions the following:

In this work series of “T-type” polyimides with azobenzene or azopyridine moieties were investigated. It is the first report where the “T-type” polyimides with derivatives of azopyridine were investigated. The cis-trans isomerization in the dark in the solid-state was showed. Polyimides with azobenzene derivatives exhibited higher stability of cis-trans recovery than their azobenzene analogs. For the inscription of the surface relief gratings, two different intensities of light (10 and 45 mJ/cm²) and a number of pulses (10 and 100) were used. Polyimides showed the modulation of SRGs up to almost 330 nm. Our studies showed, that azopolyimides are able to orient the nematic liquid crystal mols. in cell-based on effect at the twisted nematic. The obtained maximum value of t_ON was 0.9 ms (1 kHz, 1.5 V/μm) for polyimide with azobenzene moieties. Azopolyimides may be successfully used in many photonic devices based on the alignment of the liquid crystal mixture i.e. LC diffraction gratings, Fresnel lens, Vortex, in a photo-pattering technol. for creating radical and azimuthal orienting layers. And 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) was used in the research process.

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.COA of Formula: C31H20O8 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Kolesnikov, T. I.;Tsegelskaya, A. Y.;Dutov, M. D.;Orlova, A. M.;Kuznetsov, A. A. published 《Synthesis and study of the properties of thermoset oligoimides with propargyl fragment》. The research results were published in《IOP Conference Series: Materials Science and Engineering》 in 2019.SDS of cas: 38103-06-9 The article conveys some information:

A series of thermoplastic oligoimides with a propargyl substituent in the side chain was synthesized by the method of high-temperature catalytic copolycondensation in the melt of benzoic acid based on the monomer 5-(2-propyn-1-yloxy) benzene-1,3-diamine (PBD), 2,2-bis-[(3,4-di-carboxyphenoxy)phenyl]propane dianhydride (BPADA), 2,2-bis-[(4-aminophenoxy)phenyl]propane (BAPP) and phthalic anhydride (PA). The uncured imide oligomers showed good solubility (>20 wt% in N-methyl-2-pyrrolidone), wide temperature processing window (>50°C) and also flow well at 220°C. These imide oligomers were successfully converted to cross-linked structures after curing at 300°C. Cross-linked oligomers have a temperature of 5% weight loss >500°C and Tg >200°C. The experimental procedure involved many compounds, such as 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) .

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.SDS of cas: 38103-06-9 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Huang, Xinzuo;Zhang, Fenghua;Liu, Yanju;Leng, Jinsong published 《Active and Deformable Organic Electronic Devices based on Conductive Shape Memory Polyimide》 in 2020. The article was appeared in 《ACS Applied Materials & Interfaces》. They have made some progress in their research.Related Products of 38103-06-9 The article mentions the following:

Smart, deformable, and transparent electrodes are a significant part of flexible optoelectronic devices. In this work, a novel approach to making highly transparent, smooth, and conductive shape memory polyimide hybrids has been proposed. Colorless shape memory polyimide (CSMPI) with high optical transparency and high heat resistance is served as the substrate for flexible electronic devices for the first time. A hybrid (Au/Ag) metal grid electrode embedded in CSMPI (BMG/CSMPI) is first fabricated via self-cracking template and solution-coating, the advantages of which include ultrasmooth surface, superior mech. flexibility and durability, strong surface adhesion, and excellent chem. stability due to the unique embedded hybrid structure. The resulting white polymer light emitting diodes (WPLEDs) based on BMG/CSMPI with shape memory effect are active and deformable, and are converted from 2D device into 3D devices depending on its variable stiffness characteristics. The deformed 3D devices could actively recover to the original shape upon heating. Furthermore, ultrathin and flexible 3D optoelectronic devices fabricated using shape memory polymers can promote the development of advanced optoelectronic applications in the future. And 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) was used in the research process.

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.Related Products of 38103-06-9 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Application of 38103-06-9《Effects of Diamines on the Optical Properties of Poly(ether imide)s Derived from 2,2-Bis[4-(3,4-dicarboxyphenoxy)phenyl]propane Dianhydride (BPADA)》 was published in 2019. The authors were Li, Linshuang;Xu, Yong;Che, Jianfei;Liu, Xiaohong;Zhao, Wei;Ye, Zhifeng, and the article was included in《Macromolecular Research》. The author mentioned the following in the article:

The objective of this study was to investigate the effects of diamines with ether group or/and trifluoromethyl (-CF₃) group on the optical properties of polyimides. A series of poly(ether imide)s (PEIs) (III) were prepared from 2,2-bis[4-(3,4-dicarboxyphenoxy) phenyl]propane dianhydride (BPADA) with various aromatic diamines (I_a-h) including non-fluorinated diamines (I_a-d) and the corresponding trifluoromethyl-substituted diamines (I_e-h). The fluorinated PEIs III_e-h based on fluorinated diamines were nearly colorless with cutoff absorption wavelength (λ₀) below 370 nm and with solubility higher than that of the corresponding CF₃-free analogs (III_a-d). Meanwhile, they had lower dielec. constants in the range of 2.91-3.21 at 1 MHz coupled with water absorptions below 0.70% and contact angles against water beyond 108°. The III series had tensile strength of 84.3-94.4 MPa, modulus of elasticity of 3.6-8.9 GPa and elongation at break of 9.4-25.3%, together with temperatures of 5% weight loss (T_5%) beyond 510 °C. Compared to the IV series based on 4,4-(hexafluoroisopropylidene) diphthalic anhydride (6FDA), the corresponding III series exhibited better thermal and mech. properties coupled with good optical properties, especially the fluorinated PEIs III_e-h.5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) were involved in the experimental procedure.

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.Application of 38103-06-9 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

COA of Formula: C31H20O8In 2021, Li, Qing;Liu, Sheng;Guo, Yujuan;Liang, Yulin;Peng, Hualing;Chen, Ronghua;Lei, Fuhou;Wu, Wei;Zhao, Hui;Zhang, Qunchao;Li, Robert K. Y.;Duan, Wengui published 《Mussel-Inspired Polydopamine-Enhanced Polyimide for Ultrahigh Toughness and Ultraviolet Shielding Applications》. 《ACS Applied Polymer Materials》published the findings. The article contains the following contents:

A series of polyimide (PI)-based UV shielding nanocomposites were prepared with size-controlled polydopamine (PDA) nanoparticles. Two typical sizes of 120 and 200 nm were chosen to mainly investigate the influence of PDA on the structures, thermal stability, mech. performance, and UV shielding properties of PI nanocomposites. The results revealed that the PI nanocomposites containing 120 nm PDA nanoparticles showed continuously improved mech. properties with a maximum tensile strength of 94.1 MPa and a maximum elongation at break of 103.6%, resp., which were 1.33 and 7.50x those of pure PI due to the strong adsorption between the PDA and PI mols. Meanwhile, the PI nanocomposites with 200 nm PDA nanoparticles exhibited a maximum tensile strength of 78.9 MPa and an elongation at break of 83.5% when the content of PDA was 0.5 weight %. When the content of 200 nm PDA nanoparticles increased to 1 weight %, the PI nanocomposites exhibited a regressive tendency in mech. properties due to the decrease in the number of adsorption sites and the expanded distance between the PI mols. caused by the increase in the PDA size. UV-vis tests exhibited that the PI nanocomposites were transparent to visible light at low PDA loadings and maintained a superior UV shielding performance and durability, especially for PI nanocomposites with 120 nm PDA nanoparticles, which was ascribed to the absorption of UV light by the PI matrix and PDA filler. Moreover, the PI nanocomposites with smaller PDA nanoparticles had a better thermal stability. The initial degradation temperatures of the PI nanocomposites containing 120 nm PDA were above 510°C, which endow them the possibility to serve as flexible UV shielding materials in high temperatures and intense UV radiation. And 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) was used in the research process.

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.COA of Formula: C31H20O8 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Kuznetsov, D. A.;Didenko, A. L.;Svetlichnyi, V. M.;Smirnova, V. E.;Popova, E. N.;Vaganov, G. V.;Yudin, V. E.;Kudryavtsev, V. V. published 《Effect of Hard Segment Structure on the Thermomechanical Properties of Polyurethaneimides》. The research results were published in《Polymer Science, Series A: Polymer Physics》 in 2019.Formula: C31H20O8 The article conveys some information:

New segmented polyurethaneimides containing poly(ethylene glycol adipate) soft segments and bis(urethaneimide) hard segments are synthesized. Copolymers are obtained on the basis of poly(ethylene glycol adipate) (M_n = 2.5 x 10³) terminated with 2,4-toluene diisocyanate, two aromatic dianhydrides, and six aromatic diamines. The structure of the synthesized polymers is studied by IR and NMR spectroscopy. The thermal properties of the copolymers are characterized by TGA and DSC. Effects of hard segment length and substituent position in the diamine fragment on the thermal and mech. properties of the polyurethaneimides are investigated. And 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) was used in the research process.

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.Formula: C31H20O8 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Recommanded Product: 38103-06-9《Mechanically Strong, Thermally Stable, and Flame Retardant Poly(ether imide) Terminated with Phosphonium Bromide》 was published in 2019. The authors were Cao, Ke;Guo, Yichen;Zhang, Mingxuan;Arrington, Clay B.;Long, Timothy E.;Odle, Roy R.;Liu, Guoliang, and the article was included in《Macromolecules (Washington, DC, United States)》. The author mentioned the following in the article:

Phosphonium bromide-terminated poly(ether imide)s (PEI-PhPPh₃Br) possessing high mech. strength, thermal stability, and flame retardancy were synthesized by functionalizing dianhydride-terminated poly(ether imide)s (PEI-DA) with triphenyl-4-aminophenylphosphonium bromide. The PEI-PhPPh₃Br exhibited excellent tensile properties, thermal stability, and flame retardancy. The PEI-PhPPh₃Br with a mol. weight of 12 kDa [PEI-PhPPh₃Br (12k)] showed a tensile strength of 109 ± 4 MPa and a Young’s modulus of 2.75 ± 0.12 GPa, much higher than those of the noncharged PEI analog. PEI-PhPPh₃Br (12k) also showed outstanding flame retardancy, better than the state-of-the-art com. PEIs, as evidenced by the high limiting oxygen index of 51% and high char yield of 60% at 980 °C. The study herein provides a highly effective strategy to simultaneously improve mech. strength, thermal stability, and flame retardancy, which are three important properties rarely possessed by most polymers. To complete the study, the researchers used 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) (cas: 38103-06-9) .

5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)(cas: 38103-06-9) is a diallyl based epoxy modification agent that blends with the resin to improve the mechanical property of the epoxy material.Recommanded Product: 38103-06-9 It is majorly used in novalac based resins, which can be further cured with bismaleimides (BMI) for aerospace, electronics and wireless communication based applications.

Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem