CAJ | 학술논문

通过有限元分析软件ABAQUS,模拟了三氧化二铝(Al_2O_3)填允聚苯硫醚(PPS)两相复合材料逾渗结构以及Al_2O_3填充PPS合金三相复合材料双逾渗结构,并将得到的理论导热率与实验结果进行对比验证,分析了填料分布情况对材料热导率的影响.模拟结果表明:只有当导热填料含量超过逾渗阈值,其导热性能才能有明显的提高,双重逾渗结构的形成,能有效降低逾渗阈值.SEM分析表明,选用不同的合金组分,南于相容性的差异和黏度的差异,填料在PPS合金中的分布情况也有不同,热导率也有较大的差异.在所述配方中PPS/UHMWPE/Al_2O_3(质量比为35:15:50)复合体系热导率最高,可达1.592 W/(m·K),而同质量配比的PPS/PS/Al_2O_3复合体系的最低,只有0.639 W/(m·K).
통과유한원분석연건ABAQUS,모의료삼양화이려(Al_2O_3)전윤취분류미(PPS)량상복합재료유삼결구이급Al_2O_3전충PPS합금삼상복합재료쌍유삼결구,병장득도적이론도열솔여실험결과진행대비험증,분석료전료분포정황대재료열도솔적영향.모의결과표명:지유당도열전료함량초과유삼역치,기도열성능재능유명현적제고,쌍중유삼결구적형성,능유효강저유삼역치.SEM분석표명,선용불동적합금조분,남우상용성적차이화점도적차이,전료재PPS합금중적분포정황야유불동,열도솔야유교대적차이.재소술배방중PPS/UHMWPE/Al_2O_3(질량비위35:15:50)복합체계열도솔최고,가체1.592 W/(m·K),이동질량배비적PPS/PS/Al_2O_3복합체계적최저,지유0.639 W/(m·K).
The paper simulated the percolation structure of polyphenylene sulfide/aluminum sesquioxide (PPS/Al_2O_3) biphase composite and the bi-percolation structure of the triphase composite of PPS alloy and Al_2O_3, and the calculation of the theoretical thermal conductivity coefficient and the test result were com-pared with the help of the finite element analysis (FEA) software of ABAQUS. The effect of the distribution of the thermal conductive filler on the thermal conductivity coefficient of the composites was studied. The re-sult validated that the thermal conductivity coefficient rose sharply only when the filler fraction was higher than the percolation threshold, forming a bi-percolation structure, which could reduce percolation threshold effec-tively. The SEM images showed that the filler formed different distributions in the PPS alloy which resulted in different thermal conductivity coefficients, because of the different viscosity and the compatibility. The PPS/ UHMWPE/Al_2O_3 (the weight proportion was 35:15:50) composite system got a highest thermal conductivity