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Authors: Dadasaheb V. Patil, Devendra Bajaj, Prakash Sista, Nikhil Verghese

DOI: 10.33599/nasampe/s.23.0318

Abstract: Polyetherimides (PEIs) are amorphous, high performance engineering thermoplastic polymers. PEI resins offer a balance of properties such as thermal, mechanical, chemical resistance, dimensional stability, adhesion to metals and flame retardance. Hence, they are widely used in applications, such as automotive, aerospace, medical, electrical and electronics. PEIs have also been investigated as an additive to enhance the toughness performance of brittle thermoset resins. Research into the use of high molecular weight PEIs as toughening agents in thermoset resins has identified several challenges including, processability and complexities in generating the appropriate morphology in the cured thermoset network. New low molecular weight, reactive polyetherimide (rPEI) oligomers have been developed to address the above-mentioned challenges. This paper is intended to discuss the effects of cure conditions and formulations on the phase morphology, rheological, thermal, and mechanical properties of these rPEI oligomers-modified epoxy systems. Results demonstrate processability and performance advantages with the use of rPEI oligomers as a toughening agent in epoxy resins. The rPEI oligomers-modified epoxy resins exhibited a stable morphology while demonstrating enhancements in the flexural properties and toughness. Further, improvements in the heat of crosslinking reaction, and viscosity are observed while maintaining overall thermal properties. The advantages of rPEI oligomers in enhancing key structural and processing performance of epoxy systems suggest utility in a variety of demanding thermoset composites and adhesives applications.

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Conference: SAMPE 2023

Publication Date: 2023/04/17

SKU: TP23-0000000318

Pages: 13

Price: $26.00

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