PP/PS共混体系在挤出成型中的迁移行为

用傅立叶变换红外光谱(FT-IR)作为定量表征方法，研究了聚丙烯(PP)与聚苯乙烯(PS)共混物在挤出成型中的迁移行为。结果表明，不相容聚合物共混体系PP与PS熔体在挤出口模中流动时会由于剪切产生迁移，形成了粘度较高组分PP的浓度从中心到表层逐渐减小的梯度结构，并且PP的分布近似服从二次分布。     

气田用柔性复合高压输送管的施工方法

柔性复合高压输送管作为一种特殊的、新型的输送管道,具有重量轻、强度高、弹性优良、施工方便、耐腐蚀等优点,但它在前期施工过程中没有相应成熟的施工标准及工艺,仍需参考SY/T0466-1997《天然气集输管道施工及验收规范》执行。文章针对RFQ-68×9型柔性复合高压输送管的特性,结合工程实际,从储存、吊装、运输、管沟开挖、铺设、管沟回填、试压等方面总结了柔性复合高压输送管铺设的施工方法。该方法安装方便、进度快、效率高、劳动强度小,施工设备简单,成本低,可满足气田的生产要求。     

缓蚀剂对高压铝箔电蚀特征的影响

利用扫描电镜分析了盐酸+硫酸混合酸电解液中添加适量缓蚀剂聚乙二醇或聚丙烯酸对高压铝箔电解腐蚀后表面形貌与横截面形貌的影响,利用LCR仪与电子天平测试了铝箔比电容与质量失重率。结果表明:缓蚀剂可以改善电解腐蚀后铝箔表面隧道孔孔径的分布,使隧道孔由圆锥状转变为圆柱状,降低隧道孔的并孔团簇现象,这有利于提高铝箔电解腐蚀扩面后的实际表面积;同时铝箔的实际质量失重率明显降低,铝箔的比电容显著增加。     

槐茂甜面酱风味品质的分析研究

槐茂甜面酱因其独特的风味和有益作用,在消费者中有良好的口碑。 该实验研究了其风味物质的构成及对产品品质的影 响,分析了影响其风味品质的香气成分和呈味氨基酸的组成和含量。 结果表明,从槐茂甜面酱中鉴别出包括醇类、醛类、酮类、酯类、 酸类、酚类和杂环化合物等共81种挥发性物质,其中多种是食用香料,半定量分析表明呈香物质中醛类含量最高（8.869 μg/g）,其次 是酯类、酮类和酚类。 对槐茂产品呈味物质的分析表明,两种鲜味氨基酸和6种甜味氨基酸的含量为2.74 g/100 g和2.14 g/100 g、鲜味 和甜味氨基酸分别占18种总氨基酸（TAA）的相对含量为38%和30%、8种人体必需氨基酸（EAA）占TAA的相对含量为27.5%,而苦味 氨基酸的总含量为2.25 g/100 g。     

Mechanism and Kinetics Analysis of NO/SO2/N2/O2 Dissociation Reactions in Non-Thermal Plasma

The kinetics mechanism of the dissociation reactions in a NO/SO2/N2/O2 system was investigated in consideration of energetic electrons＇ impacts on a non-thermal plasma. A model was derived from the Boltzmann equation and molecule collision theory to predict the dissociation reaction rate coefficients. Upon comparison with available literature, the model was confirmed to be acceptably accurate in general. Several reaction rate coefficients of the NO/SO2/N2/O2 dissociation system were derived according to the Arrhenius formula. The activation energies of each plasma reaction were calculated by quantum chemistry methods. The relation between the dissociation reaction rate coefficient and electron temperature was established to describe the importance of each reaction and to predict relevant processes of gaseous chemical reactions. The sensitivity of the mechanism of NO/SO2/N2/O2 dissociation reaction in a non-thermal plasma was also analysed.