CAJ | 학술논문

在环氧树脂中添加自制的聚氨酯弹性改性剂QS-P24B和QS-P24R，制备了一系列由硬到软的弹性环氧树脂胶粘剂。随着改性剂QS-P24B用量增加，固化物的Tg由50℃左右逐步过渡到-50℃，中间配方的DSC曲线出现高、低2个Tg。经常温固化7 d后有的固化物的拉伸强度可达到10 MPa左右，断裂伸长率接近100%。胶粘剂性能与进口胶相当，而成本远低于进口。
재배양수지중첨가자제적취안지탄성개성제QS-P24B화QS-P24R，제비료일계렬유경도연적탄성배양수지효점제。수착개성제QS-P24B용량증가，고화물적Tg유50℃좌우축보과도도-50℃，중간배방적DSC곡선출현고、저2개Tg。경상온고화7 d후유적고화물적랍신강도가체도10 MPa좌우，단렬신장솔접근100%。효점제성능여진구효상당，이성본원저우진구。
In this paper,a series of flexible epoxy resin products from hard to soft were prepared through adjusting the content of PU modified resin named QS-P24B and QS-P24R which were made in our laboratory.The results of thermoanalysis (DSC) revealed that the glass transition temperature (Tg) changed from 50℃ to about-50℃ gradually when more PU modified resin P24B was added in the epoxy resin system,two Tg can be seen on some DSC curves.After cured at room temperature for 7 days,the tensile strength and the elongation at break of some flexible epoxy resin system can be 10 MPa and about 100%,respectively,tensile strength and the elongation at break of another system can be 2~3 MPa and above 200%,respectively.These self-made flexible epoxy systems can be equvalent to the foreign products on some properties,and can be obtained with lower cost by far.