国内外常用降凝剂成分分析及性能表征  

Componental Analysis and Characterization of Some Common Pour Point Depressants Used Domestically and Abroad

作　　者：彭茜[1] 朱岳麟[1] 熊常健[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院空间先进材料与服役教育部重点实验室,北京100191

出　　处：《理化检验（化学分册）》2012年第8期946-949,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：采用红外光谱法、凝胶色谱法、超导核磁共振波谱法、皂化滴定法以及气相色谱-质谱法等对国内外10种常用柴油降凝剂进行了成分分析,以寻找其成分对降凝剂性能的影响。结果表明:10种柴油降凝剂均属乙烯-乙酸乙烯酯聚合型降凝剂,样品聚合物部分相对分子质量较低,乙酸乙烯酯聚合物的质量分数一般在27%～37%之间,样品溶剂为重芳烃、以C_(10)为主的烷烃或者它们的混合物。其中,国外产品的相对分子质量较高(M_r>3 700),乙酸乙烯酯聚合物质量分数大于30%,且溶剂添加了少量含氮类分散剂。Aiming to find the effect of components of pour point depressants （PPD＇s） on their properties, various analytical methods, including IRS, gel chromatography, super-conducting NMRS, saponification titration and GC-MS, were applied to the componental analysis of 10 samples of home-made and imported PPD＇s commonly used for diesel oil. It was found that all of the 10 PPDrs were belonged to the type of polymers of ethylene-vinyl acetate, with relatively low relative molecular mass （Mr 〈 5 500）. Contents of polymers of vinyl acetate in the samples were found in the range of （w） 27%-37%. Heavy aromatic hydrocarbons mainly of C10 or their mixtures were used as solvents for the PPD＇ s. The following differences were found between the domestic and imported samples： （X） higher Mr（Mr〉3 700） and higher polymer contents （over 30%） for the imported PPD＇s; （2） small amounts of N-containing dispersing agent were found in the imported products.

关 键 词：降凝剂 乙烯-乙酸乙烯酯聚合物 溶剂 成分分析 

分 类 号：O65[理学—分析化学]