干法预浸料用环氧树脂固化反应行为及性能研究

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Study on the curing reaction behavior and performance of epoxy resin for dry prepreg

Guojun’，ZHANG Lanyu 2 LIU Yu1 ，HUANG Yuanyuan1 （1.Anhui Jialiqi Advanced Composite Material Technology Co.，Ltd.，Suzhou 234000; 2. Unit 93145 of the Chinese People's Liberation Army，Hefei 230000）

Abstract：Thisstudyemployedarotationalrheometer，geltimetester，diferentialscanningcalorimeter（DSC），universal testing machine，and dynamic mechanicalanalyzer （DMA）to investigate therheological properties，curing behavior，mechanical performance，and moistureresistance ofJH2165epoxyresinand its castings.Results indicate that JH2165 resin exhibits a gelation time exceeding 6O min at 130∘（ ，withexcellent viscosity stabilitybetween 75∘C and 170∘C The viscosity doubling time at 75∘C is approximately 12O minutes，demonstrating favorable processing properties.Reaction activation energy and reaction order were calculated using methods such as Kisinger and Ozawa.The optimal curing process was determined via T 一 ⋅β extrapolation.The cured casting exhibited flexural strength，impact strength，and glasstransition temperature（ Tg） of 178.97 MPa， 38.12kJ/m2 ，and 212.78∘（ C，respectively.After 24 hours of water boiling，the retention rates of flexural strength， impact strength，and Tg reached 89 % ， 80% ，and over 97 % ，respectively，demonstrating excellent mechanical properties and resistance to moisture and heat.

Keywords： epoxy resin; processability; curing kinetics; moisture and heat resistance

1引言

树脂基复合材料因其轻质高强、耐腐蚀、可设计性强等优异特性，被广泛应用于航空航天、轨道交通及高端装备制造等领域[1]。（剩余5742字）