Highly thermally stable copolymers of epoxy and trifunctional polybenzoxazine

de Souza, Lucio Rossi; d’Almeida, José Roberto M.; Cheng, Xiang; Rong, Li-Han; Caldona, Eugene B.; Advincula, Rigoberto C.

doi:10.1016/j.mtcomm.2021.102988

Highly thermally stable copolymers of epoxy and trifunctional polybenzoxazine

Journal Article · Thu Nov 18 23:00:00 EST 2021 · Materials Today Communications

DOI:https://doi.org/10.1016/j.mtcomm.2021.102988· OSTI ID:1909120

de Souza, Lucio Rossi ^[1]; d’Almeida, José Roberto M. ^[2]; Cheng, Xiang ^[3]; Rong, Li-Han ^[3]; Caldona, Eugene B. ^[4]; Advincula, Rigoberto C. ^[5]

Case Western Reserve Univ., Cleveland, OH (United States); Pontifical Catholic University of Rio de Janeiro (Brazil)
Pontifical Catholic University of Rio de Janeiro (Brazil)
Case Western Reserve Univ., Cleveland, OH (United States)
Case Western Reserve Univ., Cleveland, OH (United States); Univ. of Tennessee, Knoxville, TN (United States)
Case Western Reserve Univ., Cleveland, OH (United States); Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Here, in this work, we report the copolymerization of a triamine-based benzoxazine and a commercial difunctional epoxy resin, and investigate their synergistic effect on improved thermal properties using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Results showed that a glass transition temperature increase of up to 268 °C was obtained for the copolymer with as low as 25 wt% epoxy. A higher thermal performance was also achieved with an onset degradation of nearly 400 °C and char yield of 39 wt% at 800 °C for the copolymer with 52 wt% epoxy. The behavior was compared to previously reported benzoxazine/epoxy combinations and was found to be advantageous. The curing behavior of different copolymer compositions was also investigated via DSC and a methodology for matching each peak with its corresponding reaction was developed. Results showed that the alternating favorability of the reactions was dependent on the benzoxazine/epoxy ratio. Overall, the prepared PBZ/epoxy copolymers displayed higher thermal stability than their individual components, indicating suitability for a number of potential extended uses including utility in higher temperature applications.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1909120

Journal Information:: Materials Today Communications, Journal Name: Materials Today Communications Vol. 30; ISSN 2352-4928

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Benzoxazine
Copolymers
Epoxy
High temperature
Thermal stability
Thermosets

Highly thermally stable copolymers of epoxy and trifunctional polybenzoxazine

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References (26)

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