By the method of free-radical polymerization in solution, cross-linked copolymer of sodium acrylate and acrylic acid of super-high molecular weight.

采用自由基水溶液聚合方法合成了超高分子量的丙烯酸(钠)聚合物。

youdao

Into the acidic aqueous solution generate the free acid does not dissolve in water and viscosity reduction.

使水溶液成酸性则生成不溶于水的游离酸，粘度降低。

youdao

A new coloring method, alternating voltage passivation, was originated to obtain color films on stainless steel in Cr-free sulfuric acid solution.

提出了一种新的不锈钢着色方法——载波钝化着色，即在无铬的硫酸溶液中用载波钝化的电化学方法得到各种色彩的不锈钢表面。

youdao