Enhanced thermal properties of phthalonitrile networks by cooperating phenyl-s-triazine moieties in backbones

Zong, Lishuai; Liu, Cheng; Zhang, Shouhai; Wang, Jinyan; Jian, Xigao

doi:10.1016/j.polymer.2015.09.035

Cited by 42 publications

(23 citation statements)

References 85 publications

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“…And many studies show that phthalonitrile polymers have many outstanding properties such as excellent mechanical performance, good moisture resistance, flame resistance and superior thermal and thermo-oxidative stabilities. [1][2][3][4][5][6][7][8][9][10][11][12][13] Usually, curing agents are employed to accelerate the polymerization of phthalonitrile resins to obtain desirable performance. Thus, research on curing agents and their mechanism of action has always been a concern.…”

Section: Introductionmentioning

confidence: 99%

Copolymerization modification: improving the processability and thermal properties of phthalonitrile resins with novel comonomers

Liu

Peng

et al. 2019

Polymer International

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Two novel tetrahydrophthalic anhydride end‐capped imide compounds (THAN and THBN) with high thermal stability were synthesized to promote the curing reaction of 1,3‐bis(3,4‐dicyanophenoxy)benzene (3BOCN), and to study the effects of comonomer structure on the curing behavior and thermal performance of phthalonitrile resins. The curing behaviors of THAN/3BOCN and THBN/3BOCN blends with various molar ratios were investigated using rheological analysis and differential scanning calorimetry, suggesting a wide processing window. Dynamic mechanical analysis and thermogravimetric analysis showed that the cured resins possessed high glass transition temperatures (> 500 °C), and superior thermal and long‐term thermo‐oxidative stabilities with weight retention of 95% ranging from about 544 to 558 °C in both nitrogen and air. All these results indicated that the processability and thermal properties of phthalonitrile resins could be improved further by modifying the structure of comonomer in this kind of curing system. © 2018 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Copolymerization modification: improving the processability and thermal properties of phthalonitrile resins with novel comonomers

Liu

Peng

et al. 2019

Polymer International

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“…Growth in the aerospace, marine and microelectronic industries increasingly requires the development of heat-resistant materials. [1][2][3][4][5][6][7][8] Phthalonitrile (PN)-based resins, as a class of heat-resistant materials, have sparked great interest and attention, due to their unique properties, including outstanding thermal stability, great flame retardancy, low moisture resistance and excellent mechanical properties. [9][10][11][12][13][14] A factor that has impeded the application of neat PNs is their fairly sluggish curing condition.…”

Section: Introductionmentioning

confidence: 99%

Branched phenyl‐s‐triazine moieties to enhance thermal properties of phthalonitrile thermosets

Zong

et al. 2017

Polymer International

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Heat‐resistant materials have made tremendous progress in marine, aerospace and microelectronic fields. Herein, a new class of phthalonitrile resins, branched poly(biphenyl ether triphenyl‐s‐triazine) phthalonitriles, were successfully synthesized via a two‐step, one‐pot reaction, on the basis of 2,4,6‐tris(4‐fluorophenyl)‐1,3,5‐triazine and 4,4′‐biphenol. 4,4′‐Diaminodiphenylsulfone was employed to facilitate the curing reaction, and successful realization of curing behavior was concluded from rheological and differential scanning calorimetric studies, indicating the obtained resins possess favorable processability. The relationship between concentration of reactants and properties of the resins was systematically studied. After thermal curing, the E‐glass fiber‐reinforced composite, prepared with a concentration of reactants of 0.15 g mL−1, shows an admirable glass transition temperature of 480 °C and commendable thermal stability with 5% weight loss temperature in nitrogen of 563 °C, suggesting that the improvement of the thermal properties stems from the branched structure and the phenyl‐s‐triazine units. © 2017 Society of Chemical Industry

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“…CF/PPBES (Fig. A) shows apparent interface debondings between CFs and PPBES after shear stress failure . Vast CFs with less PPBES adhesion provide a direct evidence of interfacial invalidity, which demonstrates that the interface of CF/PPBES is so weak that the interface failure occur easily.…”

Section: Resultsmentioning

confidence: 99%

Compatibilization effect of aminated poly(phthalazinone ether ketone)s in carbon fiber‐reinforced copoly(phthalazinone ether sulfone)s composites

Zong

et al. 2017

Polymer Composites

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In this study, a kind of aminated poly(phthalazinone ether ketone)s (PPEK‐NH2s) with amino groups on side chains were synthesized by the condensation polymerization of 4‐(4‐Hydroxylphenyl)(2H)‐phthalazin‐1‐one (DHPZ), 4,4′‐difluoro benzophenone (DFK), and the third active monomer (4‐Amino)phenylhydroquinone (4‐AmPHQ). Then, PPEK‐NH2s were employed as compatibilizers to enhance the interfacial adhesion of carbon fiber (CF) reinforced copoly(phthalazinone ether sulfone)s (PPBES) composites. Differential scanning calorimetry and thermogravimetric analysis profiles indicate that PPEK‐NH2s exhibit more impressive thermal behaviors than PPBES. CF/PPBES composites with 5 wt% compatibilizers based on PPBES were fabricated by solution impregnation and compression molding. The as‐made CF/PPBES/PPEK‐NH2 (4) demonstrates the highest interlaminar shear strength and flexural strength with increasement of 12.7% and 16.8%, respectively. Meanwhile, this composite exhibits excellence in hydrothermal aging tests. Moreover, the strengthening mechanisms of CF/PPBES composites with PPEK‐NH2s could be attributed to both chemical and physical interaction between the matrix and CFs owing to amino groups. Therefore, these compatibilizers offer new insights for fabricating high‐performance advanced thermoplastic composites. POLYM. COMPOS., 39:4139–4147, 2018. © 2017 Society of Plastics Engineers

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Enhanced thermal properties of phthalonitrile networks by cooperating phenyl-s-triazine moieties in backbones

Cited by 42 publications

References 85 publications

Copolymerization modification: improving the processability and thermal properties of phthalonitrile resins with novel comonomers

Copolymerization modification: improving the processability and thermal properties of phthalonitrile resins with novel comonomers

Branched phenyl‐s‐triazine moieties to enhance thermal properties of phthalonitrile thermosets

Compatibilization effect of aminated poly(phthalazinone ether ketone)s in carbon fiber‐reinforced copoly(phthalazinone ether sulfone)s composites

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