... 阳离子层 cationic layer; 阳离子催化聚合 cationic polymerization; 阳离子滴定法 cationic titration; ...
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从聚合物的结构表征及机理探讨表明：颜色突变后，体系产生了新的活性中心，催化机理发生了转变——由配位机理转变为阳离子机理。
Structure characterization and mechanism study showed that, after the color change, new active center formed and polymerization changed from coordination to cationic mechanism.
以发烟硫酸-高氯酸为催化剂，通过四氢呋喃的阳离子开环聚合合成了窄分子量分布的聚四氢呋喃(PTHF)。
Polytetrahydrofuran (PTHF) with narrow molecular mass distribution was prepared by cationic ring-opening polymerization of tetrahydrofuran using H_2SO_4 · SO_3-HClO_4 system as a catalyst.
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