CAJ | 학술논문

采用等温差示扫描量热(DSC)法,研究了CTD-128环氧树脂与GA-327(DDM改性芳胺)的固化度-时间变化关系;采用AR2000EX型旋转流变仪,测试了上述体系的等温黏度-时间关系.比较等温条件下的固化度-时间关系和黏度-时间关系,建立了等温条件下的黏度-固化度的等时对应关系,结果表明在纯化学增黏机制影响下,树脂体系的黏度随固化度增加先缓慢增加,当固化度增大到一定程度后黏度快速增加.将等温条件下的黏度-固化度关系进行变换,得到恒定固化度下的黏度-温度关系,揭示了在物理减黏机制影响下,树脂体系黏度随温度的增加而降低,并且黏度降低幅度随固化度的增加而增大.两种黏度影响机制分离的实现,为反应性树脂体系实时黏度的准确预测提供了技术支持.
채용등온차시소묘량열(DSC)법,연구료CTD-128배양수지여GA-327(DDM개성방알)적고화도-시간변화관계;채용AR2000EX형선전류변의,측시료상술체계적등온점도-시간관계.비교등온조건하적고화도-시간관계화점도-시간관계,건립료등온조건하적점도-고화도적등시대응관계,결과표명재순화학증점궤제영향하,수지체계적점도수고화도증가선완만증가,당고화도증대도일정정도후점도쾌속증가.장등온조건하적점도-고화도관계진행변환,득도항정고화도하적점도-온도관계,게시료재물리감점궤제영향하,수지체계점도수온도적증가이강저,병차점도강저폭도수고화도적증가이증대.량충점도영향궤제분리적실현,위반응성수지체계실시점도적준학예측제공료기술지지.
The isothermal differential scanning calorimetry (DSC) method was used to determine the relationship between curing degree and time of a epoxy resin of CYD-128 with GA-327 as curing agent. An AR 2000EX rolling rheometer was used to measure the resin viscosity in a range of isothermal temperatures. Comparing the isothermal conversion-time relation with that of the isothermal viscosity-time, the isochronous relation of the isothermal viscosity-conversion was set up correspondingly. Results suggest that under the individual influence of the chemical mechanism of viscous increase, the viscosity of the resin system slowly increases with the ineresse of isothermal conversion, and then increases quiddy when the conversion reaches a certain extent. Changing the isothermal viscosityconversion relation to the relation of viscosity-temperature under the constant conversion, it shows that under the individual influence of the physical mechanism of viscous falling, the resin viscosity decreases with the temperature increased, and the viscosity descendent extent of the resin system increases with the conversion increased. These two mechanisms are separated from each other, which is the technical base of the accurate prediction for the reactive resin system,