中文摘要：

以六氢化邻苯二甲酸酐和不同金属盐为原料,合成了新型、高效的六氢化邻苯二甲酸（HHPA）金属盐类聚丙烯（PP）成核剂.采用傅里叶变换红外光谱仪、差示扫描量热仪分别测试了HHPA金属盐的结构和HHPA金属盐类成核剂改性PP的结晶和熔融行为,并对其进行吸湿性测试.结果表明,HHPA金属盐类成核剂是一类高效的PP α-晶型成核剂,当其添加量为0.3％（质量分数,下同）时,PP的结晶温度有不同程度的提高,其中六氢化邻苯二甲酸钠（HHPA-Na）的效果最好,可使PP的结晶温度提高12.1℃;与传统的成核剂苯甲酸钠相比,HHPA金属盐类成核剂具有较低的吸湿性,有利于成核剂及成核改性PP制品的保存.

英文摘要：

As a type of novel high-efficient nucleating agent for polypropylene （PP）,a series of hexahydrophthalic acid （HHPA） metal salts was prepared by hexahydrophthalic anhydride and different metal salts.Chemical structure of the resultant products was characterized by fourier transform infrared spectroscopy （FTIR）,and their effect on the crystallization and melting behaviors of PP was analyzed by differential scanning calorimetry （DSC）.The moisture absorption of HHPA metal salts was also evaluated.The results indicated that HHPA metal salts could act as a highly efficient a-crystal nucleating agent for PP,and the peak crystallization temperature of nucleated PP was improved significantly when 0.3wt % of HHPA metal salt was incorporated into PP.It was also found that the sodium salt of HHPA （HHPA-Na） had the best nucleating effect,and the peak crystallization temperature of nucleated PP increased by 12.1 ℃ compared with pure PP.In addition,the HHPA metal salts exhibited a low hygroscopicity,which is advantageous for preservation of this nucleating agent and the relevant molded parts.