Morphology transition of bismaleimide‐modified novolac resin

Lu, Guotao; Zhang, Shuai; Yan, Yehai; Zhao, Tong; Yu, Yunzhao

doi:10.1002/app.22601

Cited by 17 publications

(10 citation statements)

References 21 publications

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“…Table summarizes the mass loss rate of cured novolak, neat BAN and 0.5DCP/BAN resins at 400°C, 700°C, and 800°C. The residual weight at 700°C was 51.5 wt % which is similar to the resin developed by Lu and Yan et al . This behavior was characteristics of crosslink density of cured BAN resin.…”

Section: Resultssupporting

confidence: 81%

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Properties and curing behavior of reactive blended allyl novolak with bismaleimide using dicumyl peroxide as a novel curing agent

Jiang

Wang

Farhan

et al. 2014

J of Applied Polymer Sci

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For reducing the cure temperature and improving the thermal stability and mechanical properties, a thermosetting resin system composed of novolak and bismaleimide (BMI) was developed by reactive blending and using dicumyl peroxide (DCP) as a novel curing agent. Novolak was allylated and reacted with BMI to produce bismaleimide allylated novolak (BAN), and the effect of DCP on flexural, impact and heat distortion temperature of cured resin were investigated. On the basis of improved mechanical and thermal properties at 0.5% DCP contents, the curing behavior of DCP/BAN resin system was evaluated by DSC analysis. Ene, Diels-Alder, homo-polymerization and alternating copolymerization which occurred in DCP/BAN resin system were further verified using FTIR at sequential cure conditions from 140 to 200 C. Kissinger and Ozawa-Flynn-wall methods were used to optimize the process and curing reactions of DCP/BAN resin system. The results showed that the addition of 0.5% DCP in BAN reduced the curing temperature and time of the modified resin. For evaluating process ability of the modified system, composite samples using polyvinyl acetyl fiber were molded and tested for flexural properties. The resulting samples showed better flexural properties when compared with the composite made with neat BAN. The modified 0.5% DCP/BAN resin system with good mechanical properties and manufacturability can be used for making bulk molding compounds and fiber reinforced composites required in various commercial and aerospace applications.

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Section: Resultssupporting

confidence: 81%

“…The multitudes of reactions in the curing process of BAN were mainly Ene‐reaction, Diels‐Alder reaction, homo‐polymerization, and alternating copolymerization . The reaction between ally phenyl and maleimide ensued via the Ene‐reaction was studied by Enoki et al .…”

Section: Resultsmentioning

confidence: 99%

Properties and curing behavior of reactive blended allyl novolak with bismaleimide using dicumyl peroxide as a novel curing agent

Jiang

Wang

Farhan

et al. 2014

J of Applied Polymer Sci

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“…In addition, its position shifts at higher temperature as the content of BMI and FBMI increases. These results indicate that the formation of a single and homogeneous system, at least up to the scale of the dynamic‐mechanical test; that is, the phase domain, if it exists, is smaller than the size of the segments that are responsible for the primary molecular relaxation 15–17. Figure 3 also shows the increase in the glass transition temperature of the composite films and decrease in mechanical loss with the crosslinkable moiety content.…”

Section: Resultsmentioning

confidence: 85%

Thermal, optical, and water sorption properties in composite films of poly(ether imide) and bismaleimides: Effect of chemical structure

Seo

Jang

Han

2009

J of Applied Polymer Sci

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Two series of semi-interpenetrating polymer network (semi-IPN) composite films, PEI/bismaleimide (UTBM) and PEI/fluorinated BMI (UTFBM) were prepared using a thermoplastic PEI and two different crosslinkable imide moieties. The effects of chemical structure and content of crosslinkable imide moieties on thermal stability, dielectric properties, and water sorption have been investigated. Glass transition temperature and weight loss temperatures increased with increase in the content of crosslinkable imide moieties, indicating the enhanced thermal stability of the semi-IPN composite films. The refractive indices of the semi-IPN composite systems increased with increasing crosslinkable imide moieties due to the higher polarizabilities of atoms. The water sorption of the semi-IPN composite films was significantly decreased by the incorporation of crosslinkable imide moieties, which are interpreted by morphological structure.

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“…Maleimide are known to react with allylphenols through an Alder-ene reaction via an intermediate WagnerJauregg reaction [8][9][10]. A number of allyl functionalized polymers based on the co-reaction with bismaleimide have been reported [11][12][13]. They include the allyl-functional phenolic resins [11], propenyl functionalized oligosulphones [14] or allyl terminated hyperbranched polyimides [15].…”

Section: Introductionmentioning

confidence: 98%

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

et al. 2012

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New poly(1,2,3-triazole)s functionalized with allyl groups were prepared by the 1,3-cycloaddition reaction (click reaction) of azido-imides to bispropargyl monomers containing allyl groups. The copolymers of 4,4'-bismaleimidodiphenylmethane with allylated polytriazoles were prepared and their properties investigated. Modified bismaleimide resins had excellent processing compared with neat bismaleimides, especially improved olubility and faster thermal polymerization rate. In addition, the new cured systems had good thermal and dielectric properties (dielectric constant at 1 kHz ranged between 3.09 and 3.39, except the polymer with aliphatic segment instead of the imide group that had a higher constant, namely 4.6).

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Morphology transition of bismaleimide‐modified novolac resin

Cited by 17 publications

References 21 publications

Properties and curing behavior of reactive blended allyl novolak with bismaleimide using dicumyl peroxide as a novel curing agent

Properties and curing behavior of reactive blended allyl novolak with bismaleimide using dicumyl peroxide as a novel curing agent

Thermal, optical, and water sorption properties in composite films of poly(ether imide) and bismaleimides: Effect of chemical structure

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

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