基于松香酸酐的生物质环氧树脂体系流变特性

黏度是热固性树脂基体加工成型中主要的流变学参数。采用锥板旋转黏度计分别检测树脂体系在动态和稳态下的黏度-温度曲线和黏度-时间曲线,并根据优化改进的六参数双Arrhenius方程研究基于松香酸酐的生物质树脂体系的流变特性,分别由黏度相对方程的指数形式和对数形式拟合获得反应速率常数K和指前因数A,建立两种黏度模型。由对数形式拟合获得的黏度模型与实验测试值的吻合程度要优于用指数型关系式获得的黏度模型。流变模型揭示了生物质树脂体系在不同工艺条件(T,t)下的黏度变化规律,为复合材料制造过程中工艺参数的优化提供必要的科学依据。

Rheological behavior of rosin-sourced anhydride bio-epoxy resin system

Viscosity is the main rheology parameter of thermosetting resin matrix processing,which is an important factor effecting processing performance.The viscosity-temperature curves at dynamic states and viscosity-time curves at stead state were measured by cone-plate rotate viscosimeter,and the rheology property of bio-based resin system based on rosin-sourced anhydride curing agent was studied according to the optimization improved six parameter dual-arrhenius equation.Two kinds of rheology models were established by fitting reaction rate constant K and pre-exponential factor A according to the exponential or logarithm viscosity relative equation,respectively.The rheology model based on logarithm viscosity relative equation simulation was in good agreement with experimental data than exponential viscosity relative equation fitting.The rheology model demonstrated the law of viscosity change at different processing conditions,which provided necessary scientific basis for processing parameter optimization.