Synthesis of bismaleimide resin containing the poly(ethylene glycol) side chain: Curing behavior and thermal properties

Chian, Kerm Sin; Du, Xilong; Goy, H. A.; Feng, Jianhang; Yue, Chee Yoon

doi:10.1002/app.10883

Cited by 8 publications

(2 citation statements)

References 25 publications

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“…For the DSC scan, a sharp endothermic melting peak (T m ) is owing to the melting of CB-MI, and an exothermic transition (T i ) is because of the thermal cross-linking reactions of reactive C=C linkages with a peak temperature (T p ) at about 260°C. A similar result can be found on the carborane-free mono-maleimido-terminated oligomer, 22 indicating that the incorporation of carborane group into bismaleimide resins could not be significantly affected on the cure reaction.…”

Section: Methodssupporting

confidence: 74%

Carborane-containing bismaleimide resins with excellent heat resistance and dimensional stability

Wu¹,

Gong

Gao³

et al. 2020

High Performance Polymers

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Novel carborane-containing bismaleimides with excellent heat resistance and dimensional stability for advanced composites are presented. First, a new kind of carborane-containing mono-maleimido-terminated monomer 1-(4-tolyl)-2-(4-maleimido phenyl)- o-carborane (CB-MI) was synthesized and characterized by FT-IR and 1H-NMR. Then, it was used as a modifier for bismaleimide resin 4,4’-bismaleimidodiphenylmethane (BDM) with different weight fraction of CB-MI. The curing behavior and thermal property of the CB-MI/BDM resin systems were studied and presented here. Results displayed that a wide processing window and low curing temperature provided a good processability for the CB-MI/BDM resin system. Due to the effect of carborane groups, the char yield at 600°C of the cured resin systems tended to be increased with the addition of CB-MI. Moreover, the coefficient of thermal expansion of the resin was found to be reduced with the increase of CB-MI, indicative of a remarkable dimensional stability. This study might open up great opportunities for the preparation and design of various novel bismaleimides in a simple and feasible way and the resins with good thermal property and processability at the same time.

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Section: Methodssupporting

confidence: 74%

Carborane-containing bismaleimide resins with excellent heat resistance and dimensional stability

Wu¹,

Gong

Gao³

et al. 2020

High Performance Polymers

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“…Thermal cure reactions of BMI systems4–9 and related resin modifications,10–17 and structure–property characterization of BMI and BMI composites, have already been widely studied 17–24. However, conventional thermally cured fabrication has many limitations, such as long curing time, thermal stress and induced shrinkage and microcrack formation, expensive tooling, hazardous chemical volatiles, and size limitations for autoclave processing.…”

Section: Introductionmentioning

confidence: 99%

Electron‐beam curing of bismaleimide‐reactive diluent resins

Morgan

Tschen

et al. 2004

J of Applied Polymer Sci

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Electron-beam (E-beam) curing of 4,4Ј-bismaleimidodiphenylmethane (BMPM)/BMI-1,3-tolyl/o,oЈ-diallylbisphenol A (DABPA)-based bismaleimide (BMI) systems and their mixing with various reactive diluents, such as N-vinylpyrrolidone (NVP) and styrene, were investigated to elucidate how temperature, electron-beam dosage, and diluent concentration affect the cure extent. The effect of freeradical initiator on the cure reactions was also studied. It was found that low-intensity E-beam exposures cannot cause the polymerization of BMI. High-intensity E-beam exposures give high reaction conversion attributed to a high temperature increase, which induced thermal curing. It was shown that the dilution and activation of NVP in BMI cause a more complete BMI cure reaction under E-beam radiation.BMI/NVP can be initiated easily by low-intensity E-beam without thermal curing. FTIR studies indicate that about 70% of the reaction is complete for BMI/NVP with 200 kGy dosage exposure at 10 kGy per pass. The sample temperature only reaches about 75°C. The free-radical initiator, dicumyl peroxide, can accelerate the reaction rate at the beginning of E-beam exposure, but does not affect the final reaction conversion. The increase of the concentration of NVP in the BMI/NVP systems increases the reactive conversions almost linearly.

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Mechanical properties and morphology of poly(ethylene glycol)‐side‐chain‐modified bismaleimide polymer

Chian

Goy

et al. 2002

J of Applied Polymer Sci

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Two maleimido-end-capped poly(ethylene glycol) (m-PEG)-modified bismaleimide (BMI) resins [4,4Ј-bismaleimido diphenylmethane (BDM)] were synthesized from poly(ethylene glycol) (PEG) of two different molecular weights. A series of m-PEGs and unmodified BDM were blended and thermally cured. The effect of incorporating m-PEG side chains on the morphology and mechanical behaviors of BMI polymer were evaluated. The mechanical properties of these m-PEG-modified BMIs that were evaluated included flexural modulus, flexural strength, strain at break, fracture toughness, and fracture energy. The morphology of these blends was studied with scanning electron microscopy. All the m-PEG-modified BMI polymers showed various degrees of phase separation depending on the molecular weights and concentrations of the m-PEG used. The effects of these morphological changes in the m-PEG-modified BMI polymers were reflected by the improved fracture toughness and strain at break. However, there was a reduction in the flexural moduli in all m-PEG-modified BMI polymers.

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Synthesis of bismaleimide resin containing the poly(ethylene glycol) side chain: Curing behavior and thermal properties

Cited by 8 publications

References 25 publications

Carborane-containing bismaleimide resins with excellent heat resistance and dimensional stability

Carborane-containing bismaleimide resins with excellent heat resistance and dimensional stability

Electron‐beam curing of bismaleimide‐reactive diluent resins

Mechanical properties and morphology of poly(ethylene glycol)‐side‐chain‐modified bismaleimide polymer

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