Healing of carbon fiber reinforced plastics by Diels–Alder based polymers: Effects of healing agent concentration and curing cycle

ABSTRACT Self‐healing resin (Bismaleimide prepolymer, BMI pp) based on Diels–Alder reaction mechanism was integrated into high performance carbon fiber reinforced plastics (CFRPs). Reference and BMI pp modified CFRPs were manufactured by incorporating grains of the self‐healing agent (SHA) in the mi...

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Bibliographic Details
Published in:Journal of applied polymer science 2019-05, Vol.136 (19), p.n/a
Main Authors: Kotrotsos, Athanasios, Tsokanas, Panayiotis, Tsantzalis, Stavros, Kostopoulos, Vassilis
Format: Article
Language:English
Subjects:
Bismaleimides
bis‐maleimides
Carbon fiber reinforced plastics
Carbon fiber reinforcement
CFRP
Curing
Curing agents
Diels‐Alder reaction
Fiber reinforced polymers
fracture mechanics
Fracture toughness
Healing
Materials science
Mechanical properties
Optical microscopy
Polymers
Reaction mechanisms
Reinforced plastics
self‐healing
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Summary:ABSTRACT Self‐healing resin (Bismaleimide prepolymer, BMI pp) based on Diels–Alder reaction mechanism was integrated into high performance carbon fiber reinforced plastics (CFRPs). Reference and BMI pp modified CFRPs were manufactured by incorporating grains of the self‐healing agent (SHA) in the mid‐thickness interlaminar region through sieving. First, the effect of the SHA concentration on the toughening and healing performance of CFRPs was studied under mode I fracture loading. The SHA was able to enhance the interlaminar fracture toughness of the composite to a certain extent and also to offer a moderate thermally activated healing functionality. Also, the effect of the curing temperature on the same results was studied; it was found the decrease of the curing temperature slightly decreases the fracture toughness while increases the healing efficiency of the composite. Finally, optical microscopy examinations were conducted and three‐point bending tests were utilized to study the in‐plane mechanical properties of the composites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47478.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.47478