CAJ | 학술논문

为了提高聚对苯二甲酸丁二酯(PBT)的热导率，采用碳纤维(CF)作为导热填料，制备了PBT／CF复合材料，并研究了复合材料的热导率和力学性能等。结果表明，CF的加入能够显著提高PBT／CF复合材料的热导率，且热导率具有方向性，PBT／CF复合材料层内方向的热导率高于层间方向的热导率；当CF用量为50份时，PBT／CF复合材料的层内热导率和层间热导率分别为1.034 W／(m · K)和0.635 W／(m · K)，相比于纯PBT的0.237 W／(m · K)，分别提高了336%和168%；随CF用量的增加，复合材料的拉伸强度呈现先上升后降低的趋势，当CF用量为20份时，复合材料的拉伸强度达到最大值，为91.5 MPa，断裂伸长率逐渐降低；Lewis-Nielsen模型对PBT／CF复合材料热导率的模拟效果较好，可以预测不同CF用量时复合材料的热导率。
위료제고취대분이갑산정이지(PBT)적열도솔，채용탄섬유(CF)작위도열전료，제비료PBT／CF복합재료，병연구료복합재료적열도솔화역학성능등。결과표명，CF적가입능구현저제고PBT／CF복합재료적열도솔，차열도솔구유방향성，PBT／CF복합재료층내방향적열도솔고우층간방향적열도솔；당CF용량위50빈시，PBT／CF복합재료적층내열도솔화층간열도솔분별위1.034 W／(m · K)화0.635 W／(m · K)，상비우순PBT적0.237 W／(m · K)，분별제고료336%화168%；수CF용량적증가，복합재료적랍신강도정현선상승후강저적추세，당CF용량위20빈시，복합재료적랍신강도체도최대치，위91.5 MPa，단렬신장솔축점강저；Lewis-Nielsen모형대PBT／CF복합재료열도솔적모의효과교호，가이예측불동CF용량시복합재료적열도솔。
In order to improve the thermal conductivity of poly(butylene terephthalate)(PBT),carbon fiber(CF) was chosen as the conductive filler. PBT/CF composites were prepared,and the thermal conductivity,and the mechanical properties of the composites were researched. The results show that CF can enhance observably the thermal conductivity of PBT/CF composites,and the thermal conductivity is different in different direction. The in-plane and through-plane thermal conductivity is 1.034 W/(m · K) and 0.635 W/(m · K) with 50 phr CF,which is increased by 336%and 168%compared with the pure PBT. The tensile strength of PBT/CF composites first increases and then decreases with the increase of CF,the tensile strength is 91.5 MPa with 20 phr CF, reaching the maximum strength;the elongation at break decreases with the increase of CF. The Lewis-Nielsen model simulates thermal conductivity of the composites well and can be used to predicted the thermal conductivity well with different CF content.