The sample of low gold content is decomposed by mixed acid,then,carrying out dynamic separation and enrichment by using polyurethane foam plastic,then, roasting,ashing and getting the gold disolved and enriched into small volume,again,determining it by flame atomic absorption spectrophotometry to improve the accuracy of the assay of low content gold.
主要探索以湿法手段，将低含量金试样经混合酸分解后，通过聚氨脂泡沫(塑料)动态分离富集，灰化灼烧，将金溶解并浓缩至小体积，然后用火焰原子吸收法测定，以提高低含量金分析的准确度。
Durability of polyurethane adhesive in NaCl solution under load;
外力作用下聚氨酯胶粘剂在NaCl水溶液中的耐久性
Analysis of Hydrogen Bondings in Polyurethane Urea Cured in Graded Temperature Field by FTIR;
梯度固化聚氨酯脲中氢键的红外光谱分析
Preparation and application of the silicone-polyurethane copolymer;
有机硅/聚氨酯共聚物的制备研究与应用
Study of preparation and properties on epoxy resin adhesive modified by PU;
聚氨酯改性环氧树脂胶粘剂的制备及性能研究
Preparation and Characterization of EP/PU IPN with Continuous Graded Structure;
环氧/聚氨酯IPN连续梯度材料的制备和表征
Preparation of PTFE/PU composite membrane;
膨体聚四氟乙烯微孔-聚氨酯复合膜的制备
This article introduces the technology of trimming the aditus department of the thin-wall barrel-type piece based on the principles of transversal truncation about the polyurethane rubber.
基于聚氨脂橡胶横向截切原理介绍了薄壁筒形件口部修边的工艺方法,根据其剪切机理研制了修边模具,叙述了模具结构及主要工作零件的设计。
Adopting polyurethane and wooden bolt to ahead strengthen three soft seam wall can efficiently control coal wall fall at combined face,speed up the mining speed.
利用聚氨脂等锚固剂加木锚杆 ,对三软煤层煤壁进行超前加固 ,有效地控制了综采工作面的煤壁片冒问题 ,加快了综采推进度 ,取得了较好的技术经济效
The details were described in the developrnent of magnetic materials and foamed polyurethane plastics through determination of the geometry of dispersed phase in the materials by image analysis.
文中阐述了图像分析技术在新材料研制中的应用,具体介绍在塑料磁体、聚氨脂泡沫(塑料)研制中利用该技术对多相体系中分散相形态进行的定量测量。
The polyurethane adhesive has good toughness and adherence, and better wear-resistance than steel in liquid medium, so it could be grouted under fluid state and solidified under normal temperature and used for strengthening hydraulic structures conveniently.
聚氨酯胶在液体介质中耐磨性能优于钢铁 ,韧性好 ,粘接力强 ,具有可液态灌注、涂刷方便、常温固化和易于施工的特点 ,介绍其在水工建筑物上的应用。
Synthesis and Properties of Optically Active Polyurethanes Containing 1,1'-Binaphthyl Unit;
新型含联萘基团的旋光聚氨酯的制备与性能表征
Study on a rigid polyurethanes foam plastics;
硬质聚氨酯泡沫塑料的开发
The research and applications of shape memory polyurethanes;
形状记忆聚氨酯的研究与应用
Structure and properties of polyurethane/organic montmorillonite nanocomposites Ⅱ.Effect of ultrasonic dispersion on structure and properties of polyurethane-urea/organic montmorilonite nanocomposites;
聚氨酯/有机蒙脱土纳米复合材料的结构与性能 Ⅱ.超声波分散对聚氨酯脲/有机蒙脱土纳米复合材料结构与性能的影响
The solvent-based polyurethane-urea(PUU) resin was prepared by using PPG600 /PPG2000 blended polyether,isophoronediisocyanate(IPDI) and isophorone diamine(IPDA) as raw materials.
以PPG600和PPG2000混合聚醚、异佛尔酮二异氰酸酯(IPDI)和异佛尔酮二胺(IPDA)为原料合成溶剂型聚氨酯脲(PUU)树脂,通过改变PPG600和PPG2000配比调节树脂硬段含量。
A novel polyurethane-urea emulsion was synthesized through different methods from poly(propylene oxide)diol,toluene diisocyanate,dimethylol propionic acid,2-methyl-1,3-propane diol,ethylenediamine and diethylene triamine.
以聚氧化丙烯二元醇为软段，甲苯二异氰酸酯、二羟甲基丙酸、２—甲基—１，３—丙二醇、乙二胺和二乙烯三胺为硬段，通过不同的方法合成了一种新型的自乳化型聚氨酯脲乳液（ＡＰｕ）。