风电叶片模具灌注用环氧树脂的固化动力学及玻璃化转变温度研究  

Study on the curing dynamics and glass transition temperature of epoxy resin for wind turbine blade mold injection

作　　者：李瑞盈 胡锦澜 李祥宝 陈万康 LI Ruiying;HU Jinlan;LI Xiangbao;CHEN Wankang(Beijing Composite Materials(Tengzhou)Co.,Ltd.,Tengzhou 277500,China)

机构地区：[1]北玻院(滕州)复合材料有限公司,滕州277500

出　　处：《复合材料科学与工程》2024年第S1期11-17,共7页Composites Science and Engineering

摘　　要：本文对风电叶片模具灌注用环氧树脂的固化过程和玻璃化转变温度(T_(g))进行研究。进行了非等温DSC测试,通过DSC数据推导出树脂的理论固化工艺温度:预固化温度为60℃,固化温度为90℃,后固化温度为120℃。使用n级模型法,通过Kissinger方程和Crane方程线性拟合求解出固化动力学参数:E_(a)=57601.53 J/mol,A=1.69×10^(7) min^(-1),n=0.9,进而求出固化动力学方程,并用树脂在90℃的等温DSC数据进行比较验证。通过树脂的二次升温DSC数据,得到不同固化程度树脂的T_(g),其中固化后的树脂T_(g)为88℃,使用DiBenedetto方程进行非线性拟合,得到拟合参数λ为0.5,并得到树脂T_(g)与固化度的关系式。同时对经过后固化的树脂进行DSC测试,玻璃化转变温度从88℃提高到了120.6℃,说明树脂后固化过程对玻璃化转变温度的提升十分显著。This article investigates the curing process and glass transition temperature(T_(g))of epoxy resin used for wind turbine blade mold injection.Conduct non isothermal DSC testing and deduce the theoretical curing process temperature of the resin based on DSC data:pre curing temperature is 60℃,curing temperature is 90℃,and post curing temperature is 120℃.Using the n-level model method,the curing kinetics parameters were solved through linear fitting of Kissinger equation and Crane equation:E_(a)=57601.53 J/mol,A=1.69×10^(7)min^(-1),n=0.9.The curing kinetics equation was then calculated and compared with the isothermal DSC data of the resin at 90℃.Through the secondary heating DSC data of the resin,T_(g)of the resin with different curing degrees was obtained.The T_(g)of the cured resin was 88℃.Nonlinear fitting was performed using the DiBenedetto equation,and the fitting parameterλwas obtained as 0.5.The relationship between resin T_(g)and curing degree was obtained.At the same time,DSC testing was conducted on the post cured resin,and the glass transition temperature increased from 88℃to 120.6℃,indicating that the post curing process of the resin has a significant effect on the glass transition temperature.

关 键 词：复合材料 环氧树脂 固化动力学 玻璃化转变温度 风电叶片模具 

分 类 号：TB332[一般工业技术—材料科学与工程]