CAJ | 학술논문

为了制备具有优良导热性能、耐热性能和力学性能的新型聚氨酯(PUR)弹性体复合材料，采用预聚体法以聚四氢呋喃醚二醇(PTMG)，2，4-甲苯二异氰酸酯(TDI)和碳纤维(CF)粉末为原料，制备了不同CF含量的CF增强PUR弹性体复合材料。对其进行了导热性能、耐热性能和力学性能测试，并通过扫描电子显微镜考察了CF在PUR基体中的分散状态。红外测试结果表明，CF表面含有可以与PUR基体发生反应的—OH和—COOH。当CF质量分数为0.3%时，CF可以均匀地分散在PUR基体中，CF增强PUR弹性体复合材料的拉伸强度、撕裂强度、100%和300%定伸强度、玻璃化转变温度和热导率分别为42.24 MPa，94.03 kN／m，9.33 MPa，24.87 MPa，96.7℃和0.1385 W／(m · K)，比纯PUR弹性体分别提高了27.8%，32.2%，76.4%，102.2%，18.5℃和26.4%，而断裂伸长率为367.62%，仅下降19.5%。
위료제비구유우량도열성능、내열성능화역학성능적신형취안지(PUR)탄성체복합재료，채용예취체법이취사경부남미이순(PTMG)，2，4-갑분이이청산지(TDI)화탄섬유(CF)분말위원료，제비료불동CF함량적CF증강PUR탄성체복합재료。대기진행료도열성능、내열성능화역학성능측시，병통과소묘전자현미경고찰료CF재PUR기체중적분산상태。홍외측시결과표명，CF표면함유가이여PUR기체발생반응적—OH화—COOH。당CF질량분수위0.3%시，CF가이균균지분산재PUR기체중，CF증강PUR탄성체복합재료적랍신강도、시렬강도、100%화300%정신강도、파리화전변온도화열도솔분별위42.24 MPa，94.03 kN／m，9.33 MPa，24.87 MPa，96.7℃화0.1385 W／(m · K)，비순PUR탄성체분별제고료27.8%，32.2%，76.4%，102.2%，18.5℃화26.4%，이단렬신장솔위367.62%，부하강19.5%。
In order to prepare the advanced polyurethane(PUR) elastomer composites which possesses high thermal conductive property,heat resistance property and mechanical property,the carbon fiber(CF) reinforced PUR elastomer composites were prepared through pre-polymerized method with polytetramethylene glycol(PTMG),2,4-toluene diisocyanate(TDI) and CF powder as raw materials. The thermal conductive property,heat resistance property and mechanical properties of the composites were studied, and the disperse situation was studied by SEM. FTIR results show that there are —COOH and —OH on the surface of the CF which could occur chemical reaction with the matrix. When the mass fraction of CF is 0.3%,CF can be well dispersed in the PUR matrix,and the tensile strength,tear strength,100%elongation strength,300%elongation strength,glass transition temperature and thermal conductivity of CF reinforced PUR elastomer composites are 42.24 MPa,94.03 kN/m,9.33 MPa,24.87 MPa,96.7 ℃and 0.138 5 W/(m · K),with the incrcement of 27.8%,32.2%,76.4%,102.1%,18.5℃and 26.4%with respect to the pure PUR, however, the elongation at break is 367.62%,only decreased by 19.5%.