Month: September 2022

Wu, Yancheng;Ji, Jingqi;Huang, Haohao;Liu, Shumei;Zhao, Jianqing published 《Facile synthesis of acyloxy-containing fluorene-based Cardo polyimides with high optical transparency, fluorescence and low dielectric constant》. The research results were published in《Reactive & Functional Polymers》 in 2021.Recommanded Product: 38103-06-9 The article conveys some information:

A series of acyloxy-containing fluorene-based Cardo polyimides (PIs) were facilely synthesized by the post-polymerization modification based on a simple esterification of hydroxyl-containing PIs. Incorporation of acyloxy groups may reduce the packing d. of PI chains and weaken both inter- and intra-chain charge transfer complexes (CTC) formation. Accordingly, the modified PIs exhibit the improved solubility in low-boiling-point solvents and optical transparence. The optical transmittance at 400 nm (T₄₀₀) of all modified PI films is significantly increased to 80.1-83.5% from 41.6-54.5% of the precursor PI films. Meanwhile, the modified PI films exhibit a bright fluorescence. The modified PIs still display the superior heat resistance with a glass transition temperature (T_g) of 301.1-390.9°C as well as admirable mech. properties with a tensile strength (T_S) of 72.1-81.3 MPa. In addition, the dielec. constant (k) value at 1 MHz of the modified PI films is decreased to 2.58-2.90 from 3.95-4.48 of the precursor PI films, which is attributed to the enlarged free volume and reduced water absorption afforded by the incorporation of acyloxy groups. This work provides an efficient post-polymerization modification approach to simultaneously affording the multifunctional PI films with high T_g, high T₄₀₀ and low k, probably as the potential candidates for the practical application in display and microelectronic industries. 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.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

Wolfgang, Josh D.;Reynolds, Karina J.;Arrington, Clay B.;Odle, Roy R.;Nazarenko, Sergei I.;Long, Timothy E. published 《Influence of dianhydride regiochemistry on thermomechanical and rheological properties of 3,3′- and 4,4′-polyetherimides》 in 2021. The article was appeared in 《Polymer》. They have made some progress in their research.Application of 38103-06-9 The article mentions the following:

The design of linear high performance polyetherimides (PEIs) comprising 3,3′- and 4,4′-bisphenol-A dianhydride (bis-DA) and m-phenylene diamine (mPD) provided an opportunity to elucidate the influence of dianhydride regiochem. on thermomech. and rheol. properties. This unique pair of regioisomers allowed the tuning of the thermal and rheol. properties for high glass transition temperature polyimides for emerging engineering applications. Step-growth polycondensation enabled the production of high mol. weight PEIs for subsequent thermal and mech. anal. Monofunctional phthalic anhydride as an endcapper and monomeric stoichiometric imbalances enabled predictable number-average mol. weights ranging from 3600 to 35,400 g mol^-1, as confirmed with size exclusion chromatog. coupled with light scattering detection for absolute mol. weight determination The selection of the dianhydride regioisomer influenced the weight loss profile as a function of temperature, entanglement mol. weight (M_e), glass transition temperature (T_g), tensile strain-at-break, zero-shear melt viscosity, average hole-size free volume (V_h), and the plateau modulus prior to viscous flow during dynamic mech. anal. The 3,3′- PEI composition interestingly exhibited a ∼20°C higher glass transition temperature than the corresponding 4,4′- PEI analog. Moreover, melt rheol. anal. revealed a two-fold increase in M_e for 3,3′- PEI, which pointed to the origin of the differences in mech. and rheol. properties as a function of PEI backbone geometry. 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.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

Name: 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)《Solvent-Resistant Self-Crosslinked Poly(ether imide)》 was published in 2021. The authors were Xu, Zhen;Gehui, Liu;Cao, Ke;Guo, Dong;Serrano, Joel;Esker, Alan;Liu, Guoliang, and the article was included in《Macromolecules (Washington, DC, United States)》. The author mentioned the following in the article:

Poly(ether imide) (PEI) is a high-performance polymer with outstanding thermal stability, mech. strength, and processability, but a critical drawback of poor solvent resistance. Exposure to solvents including chloroform, DMF, dichloromethane, and N-Me pyrrolidone severely compromises the mech. and thermal performances. Herein, we report a method for preparing thermally crosslinked PEI (X-PEI) from azide-terminated PEI (N₃-PEI-N₃) synthesized via a one-pot diazotization-azidation reaction. X-PEI affords unprecedented solvent resistance unpossessed by conventional PEIs, as well as solution processability unrivaled by counterpart high-performance polymers such as polyimide. The glass transition temperature, storage modulus, and swelling ratio correlate pos. with crosslinking d., which is determined by the molar mass and azide concentration of N₃-PEI-N₃. This work advances the chem. of high-performance polymers. The method is generic and applicable to other engineering polymers. 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

Jiao, Long;Du, Zhijun;Dai, Xuemin;Wang, Hanfu;Yao, Haibo;Qiu, Xuepeng published 《Multifunctional polyimide films with superheat-resistance, low coefficient of thermal expansion and fluorescence performance》 in 2022. The article was appeared in 《Polymer》. They have made some progress in their research.Application In Synthesis of 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) The article mentions the following:

A series of novel aromatic polyimide (PI) films containing xanthone moiety was prepared through a two-step procedure, namely, the polymerization of 2,7-diaminoxanthone (2,7-DAX) and six aromatic anhydrides and thermal imidization. The solubility, thermal properties, dimensional stability, mech. properties, and fluorescence performance of the resulting PI films were studied extensively. The PI-1 film prepared by Pyromellitic dianhydride (PMDA)/2,7-DAX has a glass transition temperature (T_g) of more than 450°C, a coefficient of thermal expansion (CTE) of as low as 6.3 ppm K^-1, 5% weight loss temperature (T₅) of 608°C, a tensile strength of 164 MPa, and a tensile modulus of 5.65 GPa, resulting in potential applications in the flexible OLED field. In addition, xanthone moiety acts as a fluorophore group to provide a polymer fluorescent performance, and the maximum emission wavelength is in the range of 443-552 nm, from blue color to yellow color. 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.Application In Synthesis 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

HPLC of Formula: 38103-06-9In 2021, Miao, Weijun;Chen, Hanxi;Pan, Zhongbin;Pei, Xueliang;Li, Long;Li, Peng;Liu, Jinjun;Zhai, Jiwei;Pan, Hui published 《Enhancement thermal stability of polyetherimide-based nanocomposites for applications in energy storage》. 《Composites Science and Technology》published the findings. The article contains the following contents:

Improving thermal stability of high-performance polymer-based nanocomposite films for elec. energy storage is essential to meet ever-increasing demands for the elec. industry, especially at harsh environment applications. Here, the polyetherimide (PEI)-based composites films are prepared via grafting method in the presence of SrTiO₃ (ST) nanofillers to substantially improved capacitive performances at elevated temperature The composites films with the optimized filler compositions show a high discharged energy d. of 6.76 J/cm³ under 600 MV/m at room temperature Meantime, excellent high-temperature discharged energy d. of 6.6 J/cm³ at 100°C for the composites films is also achieved, which is superior to most of the previously reported. The simulations further demonstrate that the ST nanoparticles embedded into the composites films could effectively improve heat dissipation in comparison with pristine PEI matrix, resulting in enhancement high-temperature energy storage capabilities. This work gives considerable promise for high energy d. polymer-based nanocomposite films capacitors under harsh environments.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.HPLC of Formula: 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

Product Details of 38103-06-9In 2020, Zabegaeva, O. N.;Chen, G.;Fang, X.;Aliev, T. M.;Vygodskii, Ya. S. published 《Influence of the Structure of Polyimide Macromolecules on the Reinforcement of Polycaproamide》. 《Polymer Science, Series B: Polymer Chemistry》published the findings. The article contains the following contents:

Aromatic polyimides used in the anionic polymerization of ε-caprolactam as polyfunctional activators are considered effective reinforcing agents of polycaproamide formed in their presence. It is shown that the nature of polyimide, the rigidity of its macromols., makes the dominant contribution to the strength characteristics of copolymers. It is found that mol. composites containing up to 5 wt % of the rigid-chain polyimide have a unique specific impact strength that is several times higher than the corresponding values for both polycaproamide and its copolymers with flexible-chain polyimides. 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.Product Details 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

Dradrach, Klaudia;Rogoz, Mikolaj;Grabowski, Przemyslaw;Xuan, Chen;Weglowski, Rafal;Konieczkowska, Jolanta;Schab-Balcerzak, Ewa;Piecek, Wiktor;Wasylczyk, Piotr published 《Traveling Wave Rotary Micromotor Based on a Photomechanical Response in Liquid Crystal Polymer Networks》 in 2020. The article was appeared in 《ACS Applied Materials & Interfaces》. They have made some progress in their research.Safety of 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) The article mentions the following:

The photomech. response of liquid crystal polymer networks (LCNs) can be used to directly convert light energy into different forms of mech. energy. In this study, we demonstrate how a traveling deformation, induced in a liquid crystal polymer ring by a spatially modulated laser beam, can be used to drive the ring (the rotor) to rotate around a stationary element (the stator), thus forming a light-powered micromotor. The photomech. response of the polymer film is modeled numerically, different LCN mol. configurations are studied, and the performance of a 5.5 mm diameter motor is characterized.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.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

Bibi, Aamna;Hsu, Sheng-Chieh;Ji, Wei-Fu;Cho, Yi-Chi;Santiago, Karen S.;Yeh, Jui-Ming published 《Comparative studies of CPEs modified with distinctive metal nanoparticle-decorated electroactive polyimide for the detection of UA》 in 2021. The article was appeared in 《Polymers (Basel, Switzerland)》. They have made some progress in their research.Application In Synthesis of 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione) The article mentions the following:

In this present work, an electrochem. sensor was developed for the sensing of uric acid (UA). The sensor was based on a carbon paste electrode (CPE) modified with electroactive polyimide (EPI) synthesized using aniline tetramer (ACAT) decorated with reduced nanoparticles (NPs) of Au, Pt, and Ag. The initial step involved the preparation and characterization of ACAT. Subsequently, the ACAT-based EPI synthesis was performed by chem. imidization of its precursors 4,4′-(4.4′-isopropylidene-diphenoxy) bis (phthalic anhydride) BPADA and ACAT. Then, EPI was doped with distinctive particles of Ag, Pt and Au, and the doped EPIs were abbreviated as EPIS, EPIP and EPIG, resp. Their structures were characterized by XRD, XPS, and TEM, and the electrochem. properties were determined by cyclic voltammetry and chronoamperometry. Among these evaluated sensors, EPI with Au NPs turned out the best with a sensitivity of 1.53 uA uM-1 UA, a low limit of detection (LOD) of 0.78 uM, and a linear detection range (LDR) of 5-50 uM UA at a low potential value of 310 mV. Addnl., differential pulse voltammetric (DPV) anal. showed that the EPIG sensor showed the best selectivity for a tertiary mixture of UA, dopamine (DA), and ascorbic acid (AA) as compared to EPIP and EPIS. 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.Application In Synthesis 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

Quality Control of 5,5′-((Propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione)In 2022, Zhao, Wanjing;Cao, Xianwu;Huang, Jinshu;Wen, Jiangwei;He, Yun;Zha, Junwei;Li, Robert Kwok Yiu;Wu, Wei published 《Construction of micro-branched crosslink fluorinated polyimide with ultra-low dielectric permittivity and enhanced mechanical properties》. 《eXPRESS Polymer Letters》published the findings. The article contains the following contents:

There is a great demand for low dielec. materials as insulating interlayers in large-scale integrated circuit development. However, it is still a huge challenge to reduce the dielec. permittivity of polymers while maintaining excellent thermal stability and mech. properties. In this work, the fluorinated polyimides (PIs) in combination with a micro-branched crosslinking structure were prepared successfully by introducing different amounts of 1,3,5-tris(4-aminophenyl) benzene (TAPB) to obtain ultra-low dielec. permittivity. The results revealed that PI film containing 2 mmol TAPB had the lowest dielec. permittivity (2.47) and dielec. loss (0.008) at 1 MHz due to the fluorine atoms and the micro-branched crosslink structure, which not only decreased the mol. polarizability but also increased the free fractional volume In addition, PI film containing 2 mmol TAPB had the highest tensile strength of 106.02 MPa with an elongation at a break of 15.1% because the presence of TAPB effectively promoted the connection between PI mol. chains, resulting in the inhibition of the mol. mobility. The incorporation of TAPB also enhanced the thermal stability and UV light-shielding performance of PI films. This method paves the way for the development of PIs with ultra-low dielec. permittivity for the electronic industry. 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.Quality Control 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

Formula: C31H20O8In 2019, Huang, Xinzuo;Zhang, Fenghua;Liu, Yanju;Leng, Jinsong published 《Flexible and colorless shape memory polyimide films with high visible light transmittance and high transition temperature》. 《Smart Materials and Structures》published the findings. The article contains the following contents:

Colorless shape memory polyimide (CSMPI) has potential applications in broad fields, especially in advanced optoelectronics due to the excellent optical transparency, shape memory effect and high temperature resistance. In this work, high flexible dianhydrides and fluorine-containing diamines were used to synthesize CSMPI, which simultaneously combined great shape memory performance with high optical transparency. The effects of monomer ratios and imidization temperatures on the mol. structure and properties were investigated. Moreover, the CSMPI film possesses a higher glass transition temperature (Tg) of 234 °C, compared with the reported transparent shape memory polymers. Most importantly, the transmittance of CSMPI film is 87%-90% at 450-800 nm, meeting the requirements of heat resistance and transmittance of the substrate. Both shape recovery and shape fixity are over 97%. Flexible and colorless CSMPI films severed as substrates provide more potential in optoelectronic devices such as OLED and OPV, etc. 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.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