Bismaleimide (BMI) Resin Modified by PEEK Bearing Pendant Reactive Propenyl Groups

Abstract:

A reactive poly (ether ether ketone) PEEK with pendant propenyl groups was prepared by nucleophilic aromatic substitution of 4, 4’-Difluorobenzophenone (DFBP), diallylbisphenol A (DABPA) and bisphenyl A (BPA) as monomer. The prepared reactive PEEK with varying proportion was introduced to toughen bismaleimide (BMI) resin composing of 4,4'-bismaleimidodiphenyl methane (BMDM) and DABPA by melt technique without any solvent. The properties of the BMI resin as a function of the reactive PEEK concentration were evaluated. The presence of PEEK heightened the temperature of “ene” reaction for BMI and DABPA and slightly lowered the glass transition temperature (Tg) of the blends. The impact strength and fracture toughness were highest elevated from 9.0 KJ/m² and 186 J/m² to 15.2 KJ/m² and 239 J/m2 by 10 phr PEEK, respectively. At the same time, the thermal stability was improved by increasing the proportion of the PEEK. Scanning electron microscopy (SEM) of fracture surface revealed that the blends have good interfacial adhesion.

• Periodical: Advanced Materials Research (Volumes 197-198)
• Pages: 1299-1305
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.197-198.1299
• Online since: February 2011
• Authors: Fu Chuan Ding, Qing Song Chen, Shou Lian Lai, Xiao Yan Li
• Keywords: Bismaleimide, DABPA, Reactive PEEK, Toughness

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