Investigation on the performance of modified DETDA high-temperature wet winding resin for wet winding composite shell

doi:10.19936/j.cnki.2096-8000.20260128.005

Abstract

Abstract: In response to the demand for carbon fiber composite engine shell winding technology, organic boron compounds were used to modify DETDA curing agents, enhancing the activity of reaction sites. By combining the modified curing agent with TDE-85 epoxy resin/reactive diluent, the curing temperature can be reduced from 190 ℃ to 160 ℃, and the T_g can reach 241.5 ℃. Viscosity time and thermal analysis tests were conducted on the resin of the system. Explored the influence of modified curing agents on the molding process, and the properties of its resin casting body and composite shell were explored. The initial viscosity of the resin system is 800 mPa·s, with a shelf life of 8 h, which meets the requirements of the winding molding process for large engine shell. After curing, the resin have a high T_g, and it have excellent strength and toughness. This resin was compounded with T800 carbon fiber, resulting in a composite shell with excellent sealing properties. The mean burst pressure tested by parallel water pressure burst test is 24.6 MPa.

Key words: engine shell, epoxy resin, carbon fiber, wet winding, high temperature resistance, composites

CLC Number:

TB332

HAO Shang, YAO Zhuojun, LIU Xiangyu, WANG Xiaolei, TIAN Jie. Investigation on the performance of modified DETDA high-temperature wet winding resin for wet winding composite shell[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(1): 33-38.

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