纳米氧化铝/天然橡胶复合材料的性能研究

采用原位改性纳米氧化铝制备纳米氧化铝/天然橡胶（NR）复合材料，研究纳米氧化铝用量及原位改性时间、偶联剂Si69用量对纳米氧化铝/NR复合材料的物理性能、动态力学性能和导热性能的影响。结果表明：随着纳米氧化铝用量的增大，复合材料的拉伸强度减小，热导率和压缩疲劳温升增大。原位改性可以提高纳米氧化铝与NR之间的界面结合作用。随着原位改性时间的延长或随着偶联剂Si69用量的增大，复合材料的拉伸强度和热导率均先增大后减小，压缩疲劳温升逐渐减小。;The nano-alumina was modified in-situ and the nano-alumina/NR composites were prepared.The influence of addition level of nano-alumina，heat treatment time and addition level of coupling agent Si69 on the physical properties，dynamic mechanical properties and thermal conductivity of the composites were investigated.The results showed that，as the addition level of nano-alumina increased，the tensile strength of composites decreased，and thermal conductivity and temperature rise in compression fatigue test increased.Interface bonding of nano-alumina and NR was improved by the in-situ modification.As the in-situ modification time extended or the addition level of coupling agent Si69 increased，the tensile strength and thermal conductivity of composites increased first and then decreased，and the temperature rise in compression fatigue test decreased