Simulation of microscopic fracture behavior of ODOPB epoxy resin based on molecular dynamics

NIU Muqi; YAN Jia; XU Hao; WU Zhanjun

doi:10.13801/j.cnki.fhclxb.20211110.001

Volume 39 Issue 8

Aug. 2022

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NIU Muqi, YAN Jia, XU Hao, et al. Simulation of microscopic fracture behavior of ODOPB epoxy resin based on molecular dynamics[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 3695-3702. doi: 10.13801/j.cnki.fhclxb.20211110.001

Citation:

NIU Muqi, YAN Jia, XU Hao, et al. Simulation of microscopic fracture behavior of ODOPB epoxy resin based on molecular dynamics[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 3695-3702. doi: 10.13801/j.cnki.fhclxb.20211110.001

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Simulation of microscopic fracture behavior of ODOPB epoxy resin based on molecular dynamics

doi: 10.13801/j.cnki.fhclxb.20211110.001

State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China

Received Date: 2021-07-15
Accepted Date: 2021-10-23
Rev Recd Date: 2021-09-23

Available Online: 2021-11-11

Publish Date: 2022-08-31

Abstract

Abstract

Adding phosphorus to the epoxy resin system could effectively improve its liquid oxygen compatibility. Anyway, the research about mechanical properties of such epoxy resin system containing phosphorus was absent. Since the cured phosphorus-containing epoxy resin system had a complex and amorphous interlaced network structure, and there were many interrelated factors affecting its mechanical properties, it was difficult to demonstrate the microscopic fracture behavior by experiments. In the present paper, based on molecular dynamics (MD) research, the curing and cross-linking process of epoxy resin containing phosphorus (synthesized from 10-(2, 5-dihydroxyphenyl)-10-hydro-9-oxa-10-phosphaphenanthrene-10-oxide (ODOPB) and epichlorohydrin and 4, 4'-diaminodiphenylmethane (DDM) was simulated. The thermodynamic parameters and microscopic failure beha-vior of the resin system were calculated, and the micromechanical response mechanism under the fracture process was revealed. And the results were compared with another phosphorus containing epoxy resin system (ODOPB modified epoxy) with 2wt% phosphorus content. The analysis results provide a reference for the design and performance optimization of high-performance epoxy composites with extreme environment resistance.
- molecular dynamics,
- epoxy resin,
- ODOPB,
- liquid oxygen compatibility,
- fracture behavior
Long Abstrsct
Innovation Points

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References(25)

References

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