氯丁胶乳水泥砂浆的配制及应用

本文报道我们对氯丁胶乳水泥砂浆的研究结果。通过比较和讨论不同配方与温度对氯丁胶泥水泥砂浆固化的影响,得到了易于施工的配合比。还研究了试件的耐腐蚀性。应用实例(配合比Ⅱ)表明:氯丁胶乳水泥砂浆可用作耐蚀材料,它能有效地防止建筑物的工业大气腐蚀。     

Fe(Ⅲ)-H_2O_2-二甲基黄退色反应体系催化动力学法测定痕量铁

本文研究了Fe(Ⅲ)离子对过氧化氢氧化二甲基黄退色反应的催化作用及其动力学条件,从而建立了痕量铁的催化光度分析方法。灵敏度为2×10~(-9)g/mL Fe,测定范围为0—0.7μg/25mL。用于测定人发等试样中的铁含量取得了满意的结果。     

适用于化学反应系统的分配定律

当溶质在任一溶剂中发生化学反应(或发生缔合、解离作用)时,分配定律的简单形式不再适用,即溶质X在互不相溶的溶剂A及B中的初始总浓度C_X~A与C_X~B之比(称为溶质X的分配比D)不再维持为常     

二[1-(2-噻吩基)-4,4,4-三氟丁二酮-1,3]合铜(Ⅱ)及其某些溶剂加合物的热分析研究

Thermoanalysis study has been carried out on the complex of bis[1-(2-thienyl)-4,4,4-trifluoro-butanedione- 1,3]copper(Ⅱ) and its adducts with pyridine, 2,2′-bipyridine, quinoline and dimethyl sulfoxide in a dynamic ni-trogen atmosphere by simultaneous TG-DTG-DSC technique. The experimental results showed that the decomposi-tion modes of the solvent molecules were various according to the different structures of the complex, in general, the decomposition of them was ahead of the decomposition of the ligand 1-(2-thienyl)-4,4,4-triflurobu- tanedione-1,3. Among them the adduct with 2,2-bipyridine showed a quite unique thermal behavior. Several methods have been jointly used to study the kinetics of all the thermal decomposition stages for title compounds, which showed that the evolution of the solvent molecules was controlled mainly by Rn mechanism (or Am mechanism for 2,2-bipyridine adduct) with lower activation energy; while the release of 1-(2-thienyl)-4,4,4-trifluro-butane- dione-1,3 was gove- rned by D2 or D3 mode with higher activation energy.     

量热法研究氨基硫脲对铝在盐酸溶液中的缓蚀作用

用量热法研究了氨基硫脲对铝在盐酸溶液中的缓蚀作用。讨论了温度与缓蚀剂的浓度对缓蚀率的影响,发现氨基酸硫脲对铝的缓蚀作用类型属于置换型的吸附,求得平均吸附热为33.8kJ/mol,其吸附等温线基本服从Langmuir吸附等温式。