Study of the polymerization of high-performance polymers by electrons and x-rays: 2. The case of bismaleimide/N-vinylpyrrolidone

Grenier‐Loustalot, Marie‐Florence; Denizot, Vincent; Beziers, D.

doi:10.1088/0954-0083/7/2/004

Cited by 9 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The T g of the final product is 200°C. The above reaction conversions and T g of BMI/NVP products are close to those reported by Grenier‐Loustalot et al,30 who cured the modified BMI/NVP resin by 400 kGy at 50 kGy per step. Also, the conversion results support our earlier conclusion that initiators do not affect the cure conversion of the final products.…”

Section: Resultsmentioning

confidence: 99%

“…E‐beam curing is found to be insufficient to cure BMI resin 30. The addition of reactive diluents into the BMI resin system can increase the reactivity of BMI during E‐beam curing.…”

Section: Introductionmentioning

confidence: 99%

“…Reactive vinyl diluents, such as N ‐vinylpyrrolidone (NVP), styrene, allylphenol, vinyl ethers, acrylonitriles, acrylates, and methylacrylates, are widely used to assist BMI curing reactions 31–33. Grenier‐Loustalot et al30 made a successful attempt at using NVP as a diluent for E‐beam curing of BMI resins. It has been reported that the percentages of residual maleimide functions in BMI/NVP systems are less than 10% and the glass‐transition temperatures of the related products are around 240°C after a 400 kGy E‐beam dosage at 50 kGy per pass 30…”

Section: Introductionmentioning

confidence: 99%

“…Grenier‐Loustalot et al30 made a successful attempt at using NVP as a diluent for E‐beam curing of BMI resins. It has been reported that the percentages of residual maleimide functions in BMI/NVP systems are less than 10% and the glass‐transition temperatures of the related products are around 240°C after a 400 kGy E‐beam dosage at 50 kGy per pass 30…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Electron‐beam curing of bismaleimide‐reactive diluent resins

Morgan

Tschen

et al. 2004

J of Applied Polymer Sci

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

“…E‐beam curing is found to be insufficient to cure BMI resin 30. The addition of reactive diluents into the BMI resin system can increase the reactivity of BMI during E‐beam curing.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electron‐beam curing of bismaleimide‐reactive diluent resins

Morgan

Tschen

et al. 2004

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The E-beam curing studies were carried out using 4,4 0 -bismaleimidodiphenylmethane/BMI-1,3-tolyl/ o,o 0 -diallylbisphenol A-based BMI systems. Grenier-Loustalot et al 20 made a successful attempt at using NVP as a diluent for E-beam curing of BMI resins. 21 It has been reported that the percentages of residual maleimide functions in BMI/NVP systems are less than 10%, and the glass transition temperatures of the cured products are around 240 C after a 400 kGy E-beam dose at 50 kGy per pass.…”

Section: Introductionmentioning

confidence: 99%

Electron beam curing of functionalized N-(4-hydroxy phenyl)maleimide monomers

Gnanasekar¹,

Sarma

Varshney

et al. 2014

High Performance Polymers

View full text Add to dashboard Cite

Electron beam (E-beam) curing by different total radiation doses (100, 200, 300 and 400 kGy at 10 kGy per pass) of functionalized maleimides (20%) [ N-(4-acryloyloxy phenyl)maleimide, N-(4-methacryloyloxy phenyl)maleimide and N-(4-cyanato phenyl)maleimide] is carried out using N-vinyl-2-pyrrolidone as the reactive diluent (80%). The swelling studies indicate the presence of highly cross-linked structure in the polymer derived from cyanate-functionalized maleimide cured using 400 kGy electron beam (E-beam) irradiation. The thermal stabilities of all the polymers are studied using thermogravimetric analyzer. The materials cured using the highest radiation dose (400 kGy) are found to have better thermal stability compared to other materials cured using lower doses (100, 200 and 300 kGy at 10 kGy per pass). The degradation kinetic studies using the Vyazovkin method showed that the activation energies for the thermal degradation of polymeric materials got by E-beam irradiation of the monomers at 400 kGy are higher. Of all the materials investigated, liquid composition having N-(4-cyanato phenyl)maleimide (20%) and N-vinyl-2-pyrrolidone (80%) cured by E-beam radiation (400 kGy) showed better thermal stability.

show abstract