The curing reaction of benzoxazine with bismaleimide/cyanate ester resin and the properties of the terpolymer

Wang, Yudong; Kou, Kaichang; Wu, Guanglei; Zhuo, Longhai; Li, Junli; Yu, Zhong‐Zhen

doi:10.1016/j.polymer.2015.09.059

Cited by 69 publications

(41 citation statements)

References 25 publications

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“…More energy was required to propagate a crack in the two discrete networks that interpenetrated or entangled closely with each other, leading to higher crack tolerance under tensile loading. This phenomenon was also observed in other IPN systems [23][24][25]. It is worth noting that the introduction of FETI-19 into polycyanurate simultaneously improved the tensile strength, modulus, and toughness, which is highly desired for the fabrication of high performance composites.…”

Section: Mechanical Propertiessupporting

confidence: 63%

Interpenetrating polymer networks based on cyanate ester and fluorinated ethynyl-terminated imide oligomers

Wen¹,

Jiang²,

Liu³

et al. 2017

Express Polym. Lett.

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Abstract. Highly soluble fluorinated ethynyl-terminated imide (FETI) oligomers were prepared via a conventional one-step method in m-cresol, using 4, 4′-(hexafluoroisopropylidene) diphthalic anhydride and 2, 2′-bis(trifluoromethyl) benzidine as the monomers, and ethynylphthalic anhydride as the end-capper; then interpenetrating polymer networks (IPN) were formulated from FETI oligomers and bisphenol A dicyanate ester (BADCy) through a solvent-free procedure, and their thermal, mechanical, and dielectric properties were fully characterized. The curing mechanism was studied by model reactions using nitrogen nuclear magnetic resonance. As evidenced by differential scanning calorimetry analysis and rheological measurements, the FETI/BADCy blends exhibited lower curing temperature and shorter gelation time in comparison with pure BADCy due to the catalytic effects of ethynyl and residue amic acid groups. The properties of IPNs were fully compared with those of polycyanurate, and the results revealed that the incorporation of FETI into cyanate ester resins could significantly improve the toughness, glass transition temperatures, mechanical and dielectric properties of the resultant IPNs.

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Section: Mechanical Propertiessupporting

confidence: 63%

Interpenetrating polymer networks based on cyanate ester and fluorinated ethynyl-terminated imide oligomers

Wen¹,

Jiang²,

Liu³

et al. 2017

Express Polym. Lett.

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“…Thermomechanical properties are characterized by transformation of storage modulus and tanδ. The glass transition temperature ( T g ) is important for thermoset, and it is usually characterized by the peak temperature of tanδ. The crosslink density influences T g effectively, and it is calculated through the storage modulus ( E ′) at the absolute temperature and the temperature of T g . Figure showed the storage modulus and the tanδ of CE, CEPG, and CEPA blends, and the data of T g and crosslink densities are summarized in Table .…”

Section: Resultsmentioning

confidence: 99%

Study on properties of flame‐retardant cyanate esters modified with DOPO and triazine compounds

Chen

Wang

Huo

et al. 2018

Polymers for Advanced Techs

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Ternary flame-retardant modified cyanate ester blends (CEPG and CEPA) are formed by combining triazine compounds (TGIC or TAIC) and 9,10-dihydro-9-oxa-10phosphaphenanthrene-10-oxide with cyanate ester resin. The curing behaviors, thermal and mechanical properties, and the flame-retardant properties are investigated. The results show that the CEPG and CEPA blends result in lower curing temperatures and glass transition temperatures than those of neat CE. Both of CEPG and CEPA blends significantly improve the flame-retardant properties of CE resins, and UL-94V-0 rate is achieved for CEPG-1.0 and CEPA-0.5. The dielectric constant and loss of CEPA blends are lower than those of CEPG blend with the same phosphors content, and both of them are lower than those of neat CE. Therefore, the ternary flame-retardant modified cyanate ester blends provide 2 ways for composites of producing printed circuit board with high flame-retardant property and low dielectric constant and loss. KEYWORDS cone calorimeter, cyanate esters, dielectric constant and loss, phosphaphenanthrene, triazine compounds 1 | INTRODUCTION Cyanate ester (CE) exhibits high glass transition temperature, 1 low internal stress, 2 good adhesion, 3 low dielectric constant, 4 low toxicity, and high flame-retardant property, 5 due to the formed steady s-triazine ring by the self-curing of CE group. And owing to those advantages, CE offers several advantages over the commercial use high performance epoxy in aircraft field and electronic application. 6 However, as a thermoset resin, its flammability hinders its application which required high fire safety.As investigated in the previous research, the limiting oxygen index (LOI) of CE (26%) is much higher than that of epoxy resin (22%), but it still failed in UL-94 test. To improve the flame-retardant property of CE, many researchers focused on either combining CE with high thermostable resin such as bismaleimide and benzoxazine or modifying CE with flame-retardants such as halogen-containing, 7 phosphoruscontaining, 8,9 sulfur-containing, 10 and silicon-containing compounds. 11

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“…Dynamic mechanical analysis is the suitable technology for carrying out the modulus measurements. The crosslinking density can be calculated from the following equation:

υ_{normale} = E' / 3 R T

…”

Section: Resultsmentioning

confidence: 99%

Synthesis of branched benzoxazine monomers with high molecular mass, wide processing window, and properties of corresponding polybenzoxazines

Zhao

Qiu

Liu

et al. 2016

J of Applied Polymer Sci

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Four cyclotriphosphazene-based benzoxazine monomers (I, II, III, and IV) with relatively high molecular weight were synthesized by a nucleophilic substitution reaction, and their chemical structures were confirmed by 1 H-NMR and 31 P-NMR. A new term, oxazine value (OV, similar to epoxy value), was first proposed to explain the structure-property relationship of the cured polymers. The polymerization behaviors of the four monomers were studied by differential scanning calorimetry and Fourier transform infrared spectroscopy. The maximum exothermic peaks of the four monomers are in the range 244-248 8C. All monomers possess a wide processing window despite their high molecular weight. The thermal stability, glass-transition temperature (T g ), and mechanical properties of each cured polymer were studied by thermogravimetric analysis and dynamic mechanical thermal analysis. The char yield at 850 8C, T g , and storage moduli of PIV (polybenzoxazine obtained from monomer IV) are 60.0%, 218 8C, and 9.0 GPa, respectively. The surface property and humidity absorption character of the cured polybenzoxazines were also studied. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44453.

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The curing reaction of benzoxazine with bismaleimide/cyanate ester resin and the properties of the terpolymer

Cited by 69 publications

References 25 publications

Interpenetrating polymer networks based on cyanate ester and fluorinated ethynyl-terminated imide oligomers

Interpenetrating polymer networks based on cyanate ester and fluorinated ethynyl-terminated imide oligomers

Study on properties of flame‐retardant cyanate esters modified with DOPO and triazine compounds

Synthesis of branched benzoxazine monomers with high molecular mass, wide processing window, and properties of corresponding polybenzoxazines

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