Month: September 2022

Yin, Lu-meng;Yang, Ming-wei;Liu, Quan;Li, Xiang;Zhang, Yan;Zhi, Xin-Xin;Qi, Hao-ran;Liu, Jin-gang;Lv, Feng-zhu published 《Electrospun Polyimide Ultrafine Non-woven Fibrous Membranes Containing Phenyl-substituted Quinoxaline Units with Improved Hydrolysis Resistance for Potential Applications in High-temperature Water Environments》 in 2022. The article was appeared in 《Fibers and Polymers》. They have made some progress in their research.COA of Formula: C31H20O8 The article mentions the following:

Two organo-soluble polyimide resins containing phenyl-substituted quinoxaline units (PIPQ) were successfully prepared via the two-step chem. imidization procedure from an aromatic diamine, 6(7)-amino-2-(4-aminophenyl)-3-phenylquinoxaline (PQDA) and aromatic dianhydrides with flexible mol. structures. The derived PIPQ-1 resin from PQDA and 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and the PIPQ-2 resin from PQDA and 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride (BPADA) were all soluble in polar aprotic solvents, such as N-methyl-2-pyrrolidone (NMP) and N,N-dimethylacetamide (DMAc). The PIPQ/DMAc solutions with the solid contents of 25-35 wt% were used as the starting mediums and the PIPQ ultrafine non-woven fibrous membranes (UFMs) were successfully prepared by the one-step electrospinning (ES) procedure. The fabricated PIPQ UFMs exhibited good thermal stability with the 5% weight loss temperatures (T5%) of 537°C for PIPQ-1 (6FDA-PQDA) and 517°C for PIPQ-2 (BPADA-PQDA) in nitrogen, resp. In addition, the PIPQ UFMs exhibited glass transition temperatures (Tg) higher than 252°C. The PIPQ UFMs survived even during the aging in boiling aqueous sodium hydroxide solution (concentration: 20 wt%) for 3 h while the PI-ref UFM totally hydrolyzed during the test. 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

Zahra, Manzar;Zulfiqar, Sonia;Skene, William G.;Sarwar, Muhammad Ilyas published 《Crosslinking of polyamides using dianhydrides, diacid chloride and dialdehyde: a promising approach for water treatment》 in 2020. The article was appeared in 《Polymer International》. They have made some progress in their research.Name: 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) The article mentions the following:

New crosslinked polyamides were successfully produced from the condensation of pre-synthesized monomer, 5-(2,2,2-trifluoroacetamido)isophthaloylchloride (TFAIAC) and diamines at low temperature These polyamides were used as promising metal-chelating adsorbents due to the presence of O and N donor sites on the crosslinked polyamides. For this purpose, trifluoroacetic anhydride was used to protect the amino group of 5-aminoisophthalic acid, thus generating 5-(2,2,2-trifluoroacetamido)isophthalic acid (TFAIA). TFAIA was converted into TFAIAC using oxalyl chloride, which was exploited as a suitable monomer for the synthesis of aromatic polyamides. Amino groups were then set free under basic conditions and the crosslinking was carried out through amino groups present on the polyamide chains with different dianhydrides, isophthaloyl chloride and 2,5-thiophenedicarboxaldehyde. The synthesis of monomers and polymers was confirmed by FTIR, ¹H and ¹³C NMR spectroscopy and molar masses were measured by gel permeation chromatog. The crosslinked macromols. were found to possess enough chain alignment as depicted by their XRD patterns. The thermal stability of the crosslinked polyamides was increased as their decomposition temperatures were improved from 420 to 619 °C. Metal ion uptake was scrutinized through at. absorption spectroscopy with 83%-85% adsorption capacity at optimized parameters. The mechanism of adsorption was further investigated through the Freundlich and Langmuir adsorption isotherms. 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.Name: 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) 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

SDS of cas: 38103-06-9In 2019, Jiao, Yang;Chen, Guofei;Zhou, Haijun;Zhang, Feng;Chen, Xiaoqi;Li, Yantao;Xiao, Xueshan;Fang, Xingzhong published 《Synthesis and properties of processable poly(benzimidazole-imide)s based on 2-(3-aminophenyl)-5-aminobenzimidazole》. 《Journal of Polymer Research》published the findings. The article contains the following contents:

A series of poly(benzimidazole-imide)s (PBIPIs) derived from different dianhydrides and 2-(3-aminophenyl)-5-aminobenzimidazole (m-BIA) were synthesized via thermal imidization to form flexible films. This series of PBIPIs showed great T_gs ranging from 296 to 484°, excellent thermal stability performed in 5% weight loss temperatures (T_d5%s) of 502-529° in N₂ and good mech. properties (tensile strengths of 89-127 MPa, tensile moduli of 2.9-4.1 GPa and elongations at break of 3.9-6.9%). Compared with PIs derived from 6-amino-2-(4-(4-aminophenoxy)phenyl)-1H-benzimidazole (p-BIODA), m-BIA based PBIPI films exhibited higher T_g, and better solubility Besides, the thermoplastic PBIPI resin (PI-6-PA) derived from 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride (BPADA) and m-BIA exhibited good melt processability with high T_g of 273°, melt flow index (MFI) of 7.76 g/10 min, min. complex viscosity of 11.9 × 10³ Pa·s at 402° and low melt viscosity ratio of 2.46 at 400°. 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.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

Safety of 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)In 2019, Pham, Hieu Quang;Lee, Junyun;Jung, Hyun Min;Song, Seung-Wan published 《Non-flammable LiNi_0.8Co_0.1Mn_0.1O₂ cathode via functional binder; stabilizing high-voltage interface and performance for safer and high-energy lithium rechargeable batteries》. 《Electrochimica Acta》published the findings. The article contains the following contents:

Demands of increased energy d. and high-safety of lithium-ion and lithium metal batteries are growing for advanced electronics, elec. vehicles and energy storage systems. Nickel-rich layered oxides such as LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) are appealing as promising high-capacity cathode materials. Their reversible capacity increases further by charging to higher voltages than conventional 4.2 V, which is however difficult to make because of unstable cathode-electrolyte interface and structural degradation Herein, we report the combination of NCM811 cathode active material with non-aqueous functional polyimide binder to imparts enhanced thermal stability and highly stable interface originating from in situ building-up of surface protective polyimide layer at cathode through monodentate metal-carboxylate chem. bonds during slurry preparation, which permits to charge to 4.4 V despite in com. electrolyte without any additive. This unique active material-binder combination not only suppresses metal-dissolution and cathode degradation and produces increased reversible capacity higher than 200 mAh g^-1 but also provides unprecedented non-flammable characteristics contrary to the case of conventional binder, enabling a stable operation of higher energy and safer batteries. 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.Safety of 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) 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 38103-06-9In 2022, Ma, Kai;Jiang, Hanzhou;Chen, Guofei;Wang, Wei;Zhang, Yonggang published 《Polyimides from 2,5-bis[4-(4-aminophenoxy)benzoyl]furan and their thermal crosslinking reaction》. 《High Performance Polymers》published the findings. The article contains the following contents:

Several polyimides were prepared via two-step polycondensation from novel 2,5-furandicarboxylic acid-based diamine, 2,5-bis[4-(4-aminophenoxy)benzoyl]furan, with com. dianhydrides. The chem. structures of the monomers and polymers were characterized by FT-IR and NMR in detail, resp. The polyimides exhibited high performances with 5 wt% weight loss temperatures of over 410°C, glass transition temperatures of over 214°C, and tensile strengths and Young’s moduli of up to 130 MPa and 3.2 GPa, resp. The thermal crosslinking mechanism was studied by FT-IR, Raman spectroscopy, and model reaction anal., which showed the Diels-Alder reaction between the furan group and diphenylethylene group was the main reaction. The crosslinked polyimide films showed improved solvent resistance, and thermal and mech. properties.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

Liu, Xing;Zhou, Jianjun;Zhou, Yubin;Wu, Minghong;Zhu, Yaming;Zhao, Jianqing;Liu, Shumei;Xiao, Han published 《Chemically crosslinked polyimide-POSS hybrid: A dielectric material with improved dimensional stability and dielectric properties》 in 2022. The article was appeared in 《European Polymer Journal》. They have made some progress in their research.Recommanded Product: 38103-06-9 The article mentions the following:

One kind of the leading polymers applied in microelectronic packaging is polyimide (PI)-tethered polyhedral oligomeric silsesquioxane (POSS) hybrids. However, a well-known problem is that PI-POSS hybrids usually suffer from the serious thermal expansion at elevated temperature, leading to deteriorated reliability in electronic devices. In this work, a series of PI-POSS hybrids is successfully fabricated using aminopropylisobutyl-POSS as a reactive filler, and then the phenolic hydroxyl groups on side chains of hybrids react with terephthaloyl chloride at room temperature to form a crosslinked network. The well-designed crosslinked network suppresses the thermal expansion and improves the dielec. properties of hybrids together with POSS. As an example, after 24 h of crosslinking reaction, the coefficient of thermal expansion of the crosslinked hybrid with 14.6 wt% POSS (CPIH-2-24H) is 24 ppm/K, revealing a 59% reduction against the unmodified PI (82 ppm/K). Meanwhile, the dielec. constant and loss of CPIH-2-24H are decreased by ∼27% (2.68 vs. 3.68) and ∼72% (0.007 vs. 0.025), resp., compared with the corresponding values for the unmodified PI. These data indicate that the resultant crosslinked PI-POSS hybrids may be used as microelectronic packaging materials, and the work provides a feasible approach to restrict the thermal expansion of PI-POSS hybrids by room-temperature chem. crosslinking. 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

Cao, Ke;Serrano, Joel M.;Liu, Tianyu;Stovall, Benjamin J.;Xu, Zhen;Arrington, Clay B.;Long, Timothy E.;Odle, Roy R.;Liu, Guoliang published 《Impact of metal cations on the thermal, mechanical, and rheological properties of telechelic sulfonated polyetherimides》. The research results were published in《Polymer Chemistry》 in 2020.Electric Literature of C31H20O8 The article conveys some information:

Herein we have synthesized telechelic sulfonated polyetherimides (PEIs) with a series of metal cations, including alkali metal cations (Li⁺, Na⁺, and K⁺) and alk. earth metal cations (Mg²⁺, Ca²⁺, and Sr²⁺). By comparing the metal sulfonated PEIs with a noncharged analog phenyl-terminated PEI, we have systematically investigated how the metal cations affect the thermal, mech., and rheol. properties of PEIs. PEIs with alk. earth metal cations showed higher thermal degradation temperatures than those with alkali metal cations. All sulfonated PEIs showed lower thermal degradation temperatures than noncharged PEIs. All metal cations except K⁺ and Sr²⁺ increased the glass transition temperatures of sulfonated PEIs. Most metal (except K and Sr) sulfonated PEIs possessed good film formability when the mol. weight was above 10 kDa. Due to their large cation sizes, the K and Sr sulfonated PEIs exhibited reduced glass transition temperatures and inferior film formability. Alkali metal sulfonated PEIs showed high thermo-oxidative stability, but none of the alk. earth metal sulfonated PEIs exhibited good thermo-oxidative stability. The rheol. time-temperature superposition revealed that the interaction strength between the sulfonate anions and the alkali metal cations decreased as the cation size increased in the sequence of Li⁺, Na⁺, and K⁺. This study provides a guideline for synthesizing metal sulfonated PEIs and other metal sulfonated polymers with tailored thermal, mech., and rheol. properties. 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.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;Nocon, Klaudia;Jankowski, Andrzej;Wolinska-Grabczyk, Aleksandra;Schab-Balcerzak, Ewa;Janeczek, Henryk;Konieczkowska, Jolanta published 《Azopolymers with imide structures as light-switchable membranes in controlled gas separation》 in 2019. The article was appeared in 《European Polymer Journal》. They have made some progress in their research.Synthetic Route of C31H20O8 The article mentions the following:

In the paper, we demonstrate a series of azobenzene polyimides with azomoieties located in the main chain for potential applications as membranes for controlled gas separation Since azobenzene derivatives can exist in two forms, i.e., thermodynamically stable trans and photoinduced cis, both isomers can be utilized for membrane preparation The long term stability of the cis form is a precondition for such an application. Thus, the effect of polymer structure on the stability of cis-trans isomerization process in polymer films was investigated. The prepared azopolymers exhibited high stability of cis isomers and the return cis-trans reaction was not completed during 7 days after switching off the excitation light (405 nm). The stability of the cis-trans isomerization was discussed in the context of the fragility parameter. To the best of our knowledge, it is the first time when the main chain azopolymer was tested as a membrane for the gas separation Two types of azomembranes, i.e., bearing azobenzene derivatives as trans, and cis isomers and a reference membrane without azochromophore were prepared Our investigations showed that the presence of trans-azomoieties increases the permeability of the gases (N₂, O₂, He and CO₂) in comparison to the reference polyimide and that the permeability increase is not accompanied by any losses of the selectivity.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.Synthetic Route 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

Application of 38103-06-9《Polyimide Aerogel Fibers with Superior Flame Resistance, Strength, Hydrophobicity, and Flexibility Made via a Universal Sol-Gel Confined Transition Strategy》 was published in 2021. The authors were Li, Xin;Dong, Guoqing;Liu, Zengwei;Zhang, Xuetong, and the article was included in《ACS Nano》. The author mentioned the following in the article:

Aerogel fibers with ultrahigh porosity, large sp. surface area, and ultralow d. have shown increasing interest due to being considered as the next generation thermal insulation fibers. However, it is still a great challenge to fabricate arbitrary aerogel fibers via the traditional wet-spinning approach due to the obvious conflict between the static sol-gel transition of the aerogel bulks and the dynamic wet-spinning process of aerogel fibers. Herein, a sol-gel confined transition (SGCT) strategy was developed for fabricating various mesoporous aerogel fibers, in which the aerogel precursor solution was first driven by the surface tension into the capillary tubes, then the gel fibers were easily formed in the confined space after static sol-gel process, and finally the mesoporous aerogel fibers were obtained via the supercritical CO₂ drying process. As a typical case, the polyimide (PI) aerogel fiber prepared via the SGCT approach has exhibited a large sp. surface area (up to 364 m²/g), outstanding mech. property (with elastic modulus of 123 MPa), superior hydrophobicity (with contact angle of 153°), and excellent flexibility (with curvature radius of 200μm). Therefore, the aerogel woven fabric made from PI aerogel fibers has possessed an excellent thermal insulation performance in a wide temperature window, even under the harsh environment. Besides, arbitrary kinds of aerogel fibers, including organic aerogel fibers, inorganic aerogel fibers, and organic-inorganic hybrid aerogel fibers, have been fabricated successfully, suggesting the universality of the SGCT strategy, which not only provides a way for developing aerogel fibers with different components but also plays an irreplaceable role in promoting the upgrading of the fiber fields.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