选取正十七烷、正十八烷、正二十烷有机相变材料进行两两混合,制备二元混合物,利用差示扫描量热仪研究二元混合物的相变温度及相变潜热。选取理论计算公式对不同质量配比的二元混合物的相变温度及相变潜热进行理论预测,并与实验值进行对比。结果表明,制备的二元混合物的相变温度及相变潜热的实验值与理论计算值吻合较好,证明所选取的理论计算公式应用于正构烷烃相变温度和相变潜热的预测是可行的。

N-seventeen alkane,n-eighteen alkane and n-twenty alkane organic phase-change materials were mixed to prepare binary mixtures.Phase transition temperature and latent heat were experimentally studied by differential scanning calorimeter.The theoretical calculation formula was used to predict the phase transition temperature and latent heat of the binary mixtures with different proportion.The theoretical and experimental data were compared.The results showed that the experimental data of phase transition temperature and latent heat were in good agreement with the theoretical ones.It is proved that the theoretical calculation formula was feasible to predict the phase change temperature and latent heat of normal paraffin.