Research shows that the coating obtains more significant improvement of anticorrosion properties when fat amine hardener of epoxy resin acts as a solvent for neutral polyaniline at first and then mixes with epoxy than when epoxy resin mixes with polyaniline and then addes hardener. 研究发现当环氧树脂脂肪胺固化剂充当溶剂首先与聚苯胺混合,再加入环氧树脂所制得的涂层比环氧树脂先与聚苯胺混合,再加入固化剂所制得的涂层的防腐性能要更好一些。
METHODS : Pre-processing of sample was performed by solvent extraction and neutral aluminum oxide, the content was determined with evaporate light scattering detector ( ELSD ) by HPLC. 方法:采用溶剂提取结合中性氧化铝进行样品前处理,用HPLC法,以蒸发光散射检测器测定黄芪甲苷含量。
Study on solvent extraction of macrolides by neutral complexing extractants 大环内酯类抗生素的中性络合萃取研究
Synergistic and antagonistic effects in solvent extraction of uranium from dilute sulphuric acid solutions using neutral organophosphorus compounds respectively in combination with d_2ehpa 在硫酸介质中筛选缓蚀剂的研究(1)用D2EHPA和中性有机磷化物从稀硫酸溶液中萃取铀的协同与反协同效应
When solvent dielectric constant decreases, the intramolecular electrostatic effect increases, neutral polyampholyte or non-neutral polyampholyte with lesser net charges will be inclined to shrink, while non-neutral polyampholyte with more net charges may be extended. 溶剂介电常数减小,链节间静电作用增强,净电荷比较小的中性或非中性两性聚电解质链倾向于收缩,净电荷比较多的链则膨胀。