High performance bismaleimide resins modified by novel allyl compounds based on polytriazoles

Ursache, Oana; Găină, Constantin; Gaina, Viorica; Musteata, Valentina-Elena

doi:10.1007/s10965-012-9968-4

Cited by 23 publications

(9 citation statements)

References 31 publications

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“…The pure BT resins only had one exothermic peak, and the peak started at 274.5 C. Pure BT resins also showed a single exothermic peak when added with 20 wt% DBA; the exothermic peak temperature of approximately 43 C is lower than the temperature of pure BT resins. This phenomenon can be attributed to the multiple reactions between DBA and BT resins during curing, such that DBA can catalyze CE to generate triazine rings at a low temperature 29 and enables "Ene" and "Diels-Alder" reactions between DBA and BMI [30][31][32][33] during curing; the curing exothermic peaks of the multiple reactions may overlap at a low temperature. Noticeably, when the DBA content was adjusted to 40 wt%, the two exothermic peaks occurred at low temperatures, indicating that a number of reactions occur easily during cure.…”

Section: Dsc Analysismentioning

confidence: 99%

Thermally stabilized bismaleimide–triazine resin composites for 10-GHz level high-frequency application

Yang

Mao

et al. 2017

High Performance Polymers

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A hybrid cured resin with excellent dielectric and thermal properties was prepared with bismaleimide–triazine (BT) resin modified with 2,2′-diallylbisphenol A (DBA). The thermal and dielectric properties of the resin were investigated, and the effect of DBA concentration on the curing reaction was determined. Results indicated that DBA significantly influenced the curing reaction and the properties of the cured product. The modified BT resins exhibited outstanding thermal stability (initial decomposition temperature was over 400°C), although the stability was slightly lower than that of pure BT resins. The dielectric constant and dielectric loss of the cured resin decreased when DBA was introduced into the BT resins. Moreover, the fabricated resins showed dielectric constant of 2.91–3.07 and dielectric loss lower than 0.0057 under the testing high-frequency range of 1 GHz to 15 GHz. Overall, the BT resins modified by DBA display great potential to be applied in high frequency field.

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Section: Dsc Analysismentioning

confidence: 99%

Thermally stabilized bismaleimide–triazine resin composites for 10-GHz level high-frequency application

Yang

Mao

et al. 2017

High Performance Polymers

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“…This decrease may be due to the fact that the introduction of phenyl groups in the chemical structure of the DGEBA/BMI/pABA sample may increase the free volume, reducing the number of polarizable units from a concerned molar volume . Moreover, the presence of nonpolar methyl‐type groups between the benzene nuclei should decrease the polarizability of the main chains . The temperature evolution of dielectric constant at selected frequencies is displayed in Figure A for the DGEBA/BMI/pABA sample.…”

Section: Resultsmentioning

confidence: 99%

Thermal and electrical behavior of hybrid thermosets based on epoxy and maleimide resins cured with p‐aminobenzoic acid

Mustaţă¹,

Tudorachi²,

Asăndulesa³

et al. 2019

Int J of Chemical Kinetics

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Two thermoset systems based on maleimides and diglycidyl ether of bisphenol A (DGEBA) cured with p‐aminobenzoic acid were characterized in terms of thermal and electrical behavior. Thermal characterization has been undertaken by means of thermogravimetric analysis in nitrogen atmosphere up to 600°C using simultaneous thermogravimetric/Fourier transform infrared/mass spectrometry (TG/FT‐IR/MS) analysis. In the first stage of thermal degradation, the global kinetic parameters [activation energy (Ea) and preexponential factor (log A1 (s−1))] were calculated using the isoconversional method of Friedman. The energies variation as well as the shape of the differential thermal analysis curves suggests that the thermal decomposition process occurred in multiple stages. The evolved gases analysis was conducted by simultaneous TG/FT‐IR/MS coupled techniques. Dielectric relaxation spectroscopy characterization was also made.

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“…This was due to the fact that polarizable units do not have enough time to keep up with the oscillations of an alternating electric field when the frequency was higher than 10 4 Hz. 31 Conclusively, DBPA-Ph/BMI/GF composite laminates exhibited an important and attractive merit for developing high-performance insulators. Furthermore, the DBPA-Ph/BMI system could be explored to some novelty polymer matrix composites.…”

Section: Dielectric Properties Of Dbpa-ph/bmi/gf Composite Laminatesmentioning

confidence: 97%

The effect of bismaleimide on thermal, mechanical, and dielectric properties of allyl-functional bisphthalonitrile/bismaleimide system

Jiang

Zou

Huang

et al. 2016

High Performance Polymers

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Allyl-functional phthalonitrile (DBPA-Ph) and bismaleimide (BMI) have been considered as advanced composite-matrix resins applied in various fields. In this work, self-promoted polymerization behavior and processability of DBPA-Ph/BMI system were investigated in detail. To further reveal the effect of BMI on the properties of DBPA-Ph/BMI system, the blends and the prepolymers of DBPA-Ph/BMI were prepared in different proportions. Their curing and rheological behaviors were investigated by differential scanning calorimetry and dynamic rheological analysis. The results further confirmed the possible reaction mechanisms and demonstrated that DBPA-Ph/BMI prepolymers exhibited good processability, which included wide processing window (approximately 75°C), low melting viscosity (<0.2 Pa·s), and better reactivity. The copolymers exhibited satisfactory thermal stabilities ( T5% > 421°C, char yield at 600°C >70%). Moreover, the DBPA-Ph/BMI/glass fiber composite laminates were prepared and the effect of the curing temperature and BMI content on mechanical properties and dielectric properties were also investigated. The results show that the composite laminates exhibit favorable mechanical properties and weak frequency dependence of dielectric properties over a wide frequency range. Above all, the research on DBPA-Ph/BMI system could expand its applications in industry, especially in the areas, which require high temperature resistance and excellent mechanical and dielectric properties.

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High performance bismaleimide resins modified by novel allyl compounds based on polytriazoles

Cited by 23 publications

References 31 publications

Thermally stabilized bismaleimide–triazine resin composites for 10-GHz level high-frequency application

Thermally stabilized bismaleimide–triazine resin composites for 10-GHz level high-frequency application

Thermal and electrical behavior of hybrid thermosets based on epoxy and maleimide resins cured with p‐aminobenzoic acid

The effect of bismaleimide on thermal, mechanical, and dielectric properties of allyl-functional bisphthalonitrile/bismaleimide system

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