催化脱脂型粘结剂组分的相容性

Compatibility of catalytic debinding ingredients

对催化脱脂型粘结剂组分的相容性进行研究,对催化脱脂型粘结剂组元的溶解度参数进行热力学计算,采用DSC和扫描电镜分别对粘结剂进行热分析和端口形貌观察来表征粘结剂组元的相容性。结果表明:粘结剂主要组元聚醋酸乙烯(EVA)分别与聚甲醛(POM)和高密度聚乙烯(HDPE)均具有较好的相容性;m(POM)/m(HDPE)/m(EVA)为75/5/1时表现出良好的工艺相容性;设计了以75POM-5HDPE-1EVA(质量分数)为主要组元,同时添加一定量改性剂(石蜡(PW)、邻苯二甲酸二辛醋(DOP)和硬酯酸锌(ZS))的催化脱脂型粘结剂,该粘结剂与93W-Ni-Fe复合粉经混炼制得了均一、稳定的喂料。

The compatibility of the catalytic debinding ingredients was studied,the solubility parameters of catalytic debinding ingredients were thermodynamically calculated,the thermal analysis and fracture morphology of binders were used to characterize compatibility of the catalytic debinding ingredients by DSC and SEM,respectively.The results show that the ethylene-vinyl acetate（EVA） which is the main component of binder has good compatibility with high density polyethylene（HDPE） and polyoxymethylene（POM）,respectively;POM/HDPE/EVA shows good technique compatibility with the mass ratio of 75/5/1;the catalytic debinding binder was designed with the 75POM-5HDPE-1EVA（quality score） as main components while adding a certain amount of the modifier（paraffix wax（PW）,dioctyl phthalate（DOP）,and stearic acid zinc（ZS））,the feedstocks produced by mixing binder and 93W-Ni-Fe powder are found to be homogeneous and stable.