邻位取代基对芳基杂环磷酸盐成核有效性的影响  

Effects of Ortho-substituted Groups on Nucleating Effectiveness of Aromatic Heterocyclic Phosphate Salts

作　　者：张凯[1,2] 黄金[1] 何文涛[2] 秦舒浩[2] 于杰[1,2] 

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵阳550014

出　　处：《高分子学报》2015年第5期602-609,共8页Acta Polymerica Sinica

基　　金：贵州省科学技术基金(基金号黔科合J字[2014]2100号);贵州省国际科技合作项目(项目号黔科合外G字[2012]7029号);国家科技支撑计划课题(项目号2013BAB07B03)资助

摘　　要：以2,4-二叔丁基苯酚为原料分别合成2,2'-亚甲基双(4,6-二叔丁基苯基)磷酸钠(NA-1)和2,2'-亚甲基双(4-叔丁基苯基)磷酸钠(NA-2),并将其应用于等规聚丙烯(i PP),研究该类芳基杂环磷酸盐成核剂邻位取代基对其成核有效性的影响.通过红外吸收光谱(FTIR)、核磁共振谱(NMR)、X-Ray多晶粉末衍射(XRD)、扫描电镜分析(SEM)和热分析对其化学结构、凝聚态结构、颗粒形貌和物性特征进行了表征,确定了NA-1和NA-2的分子结构和凝聚态颗粒的结构、形貌和物性特征.利用偏光显微观察(POM)、扫描电镜(SEM)断口分析、示差式扫描量热分析(DSC)和雾度测试分析对其与i PP的复合材料的晶粒结构、结晶行为及宏观光学性能进行测试表征.结果表明,添加量0.2%时,邻位叔丁基(NA-1)的存在可使复合材料球晶尺度更加细密,结晶温度比无邻位叔丁基(NA-2)增加5.1 K,等温结晶速率提高至0.56 w/g是NA-2的7倍,半结晶时间由NA-2的11.55 min下降至2.36 min,邻位叔丁基存在对材料透光率和雾度值的影响分别达到4.3%,7.4%.SEM断口分析表明二者在i PP基体中分散均匀,平均粒径相近分别为0.79μm和0.82μm,粒径分布曲线相近,二者分散分布的差异性不显著.Sodium 2,2＇-methylene-bis（4-6-di-t-butylphenyl） phosphate （NA-1） and sodium 2,2＇-methylene- bis（4-t-butylphenyl） phosphate （NA-2） were synthesized from 2,4-di-t-butyl phenol. The differences of nucleated effectiveness which the ortho-substituted groups of aromatic heterocyclie phosphate salts resulted in were studied. The structures of molecule, condensed state, character of surface and thermal parameters were characterized by Fourier transform infrared spectrometry （FTIR）, nuclear magnetic resonance （NMR）, X-ray diffraction （XRD） and scanning electronic microscopy （SEM） , thermo gravimetric analysis （TGA） and differential scanning calorimetry （DSC）. The structure of crystal, crystallization behavior and optical properties of the NA-1/iPP and NA-2/iPP composites were analyzed by polarizing optical microscopy （POM） , analysis of the fractured surface, DSC,photo electricity opacimetry （ PEOM）. The results showed that NA-1 could induce iPP＇s spheruletes finer, peak temperature of crystallization （ Top ） higher 5.1℃ , haze lower 7.4% and transmittance higher 4.3% than NA-2 when the content of two kinds of nucleates in iPP is 0.2%. The results of fractured surface SEM analysis of iPP and nucleated iPP composites showed that the uniformity of NA-1 and NA-2 in the base material was fine and their mean particle sizes were 0.79μm and 0.82μm. Their curves of Frequency distributions by particle size were similar. The differences of uniformity and distributions were indistinctive,so the Effects of nucleating effectiveness of Aromatic Heterocyclic Phosphate Salts were induced by the ortho-substituted groups of molecular structures.

关 键 词：成核剂 芳基杂环磷酸盐 等规聚丙烯 成核有效性 结晶行为 

分 类 号：O632.12[理学—高分子化学]