阳离子催化聚合作用
In this review, we focus on the progress in synthesis of new block polymers and multi block polymers by living cationic polymerization.
本综述主要介绍利用活性阳离子聚合合成二、三元嵌段和多元嵌段共聚物的研究成果。
Research progress in synthesis of block copolymer by transformation polymerization of living cationic polymerization into other ki nds of polymerizations was summarized.
综述了国内外利用活性正离子聚合转化法合成嵌段聚合物的研究进展。
Experimental results showed that radical-cationic hybrid UV curing system, which combines the advantages of radical and cationic polymerization, gives a better synergy effect.
混杂光固化体系是指在同一体系中采用两种或两种以上不同类型的聚合反应使体系固化的方法。
C5 petroleum resin was synthesized by cationic polymerization with C5 fractions as raw materials.
以C5馏分为原料，采用正离子聚合反应，经过原料预处理、热聚合、正离子聚合等工序合成了C5石油树脂。
In this paper, we summarize mainly the chemical initiating methods for grafting in three categories: free radical, anionic and cationic polymerization.
着重总结了接枝的化学引发方法，分自由基、 阳离子、 阴离子聚合引发体系三大类进行讨论。
The total yield of resins made by the two-step method of radical and cationic polymerization is higher than 60%.
采用自由基和阳离子两步聚合法使石油树脂总收率提高到60％以上。
Moreover, cationic polymerization of DVB also can happen in the condition.
此外，DVB在还会发生阳离子型自聚反应。
This review with 40 references describes recent advances concerning applications of proton trap in the cationic polymerization.
本文介绍了质子捕捉技术在阳高子聚合中的应用及最新研究工作进展。
One of the keys to a living cationic polymerization is to add some additives, including electron donor compounds, ammonium salts and chelating agents, into a reaction system.
实现活性碳阳离子聚合的一个关键点就在于向反应体系中加入某种添加剂，例如给电子化合物、铵盐等。
The cationic polymerization initiator.
离子聚合的引发剂。
Photoinitiator of cationic polymerization is a new type of high efficient photoinitiators used in UV curing applications.
阳离子型光引发剂是一类新型的紫外光固化材料的引发剂。
One of the most important breakthroughs in cationic polymerization in 1980s is perhaps the discovery of living cationic polymerization.
在80 年代，阳离子聚合研究的一个最重要突破可能就是活性阳离子聚合。
The results showed that:There were not obvious retarding effects of the conventional cationic surfactant 1227 and cationic polymerization surfactant dyeing modified polyester ;
研究结果表明：传统的阳离子表面活性剂1227和聚合阳离子表面活性剂对改性涤纶的上染没有明显的缓染作用；
The development of living cationic vinyl polymerization since its appearance in 1980's, and its advancement in new monomers and initiators are reviewed.
概述了80年代以来活性碳阳离子聚合出现以后的发展状况及在新单体和新引发剂的探索过程中的进展。
The cationic SBR latexes can be prepared either by emulsion polymerization using cationic emulsifiers or by changing anionic latex as starting material into cationic latex using cationic surfactants .
简介了国外采用阳离子乳化剂乳聚或用阳离子型表面活性剂对阴离子胶乳转换生产阳离子SBR胶乳的方法。
Figure 7 … Several monomers for cationic ring…opening polymerization.
图7 …几种阳离子开环聚合的单体。
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.
以************-高氯酸为催化剂，通过************的阳离子开环聚合合成了窄分子量分布的聚************（PTHF）。
A stable hydrographic copolymerizational emulsion is manufactured through the reaction in the same system of the free radical polymerization and the cationic catalysis condensation.
研制成功一种稳定的水性共聚乳液，它是在自由基型聚合和阳离子型催化缩聚的共同体系中反应制得的。
Structure characterization and mechanism study showed that, after the color change, new active center formed and polymerization changed from coordination to cationic mechanism.
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。
The synthesis of cationic - type polyacrylamide via reversed emulsion polymerization method is an advanced technology at the late 80's abroad, and there have not been related reports in China.
反相乳液聚合法合成阳离子型聚************是国外80年代末期的先进技术，而国内一直没有相关报道。
The synthetic product poly-DMDAAC was subsequently prepared based on free radical solutions polymerization, which was then applied as cationic additives in ink-jet paper coating.
将合成的聚二烯丙基*********氯化铵作为阳离子添加剂应用于彩色喷墨打印纸涂层中并测定成纸的各项性能。
The reverse phase emulsion polymerization method for synthesizing DDAC/AM cationic type copolymer with high molecular weights and high solid content was also stu***d.
研究了反相乳液聚合合成高固含量、高分子量DDAC／AM阳离子型共聚物的方法；
Hybrid UV curing system includes free radical cationic hybrid UV curing system, Free radical condensation polymerization system and free radical free radical system.
混杂光固化体系包括自由基阳离子混杂光固化体系、自由基缩聚混杂体系和自由基自由基混杂体系等。
A cationic thickener GD-1 was prepared by inverse emulsion polymerization with AM and DMDAAC as materials.
以************（AM）和*********二烯丙基氯化铵（DMDAAC）为原料，通过反相乳液聚合，制得阳离子型稠化剂GD-1。
阳离子聚合（Cationic Polymerization）是一种重要的链式聚合反应，其核心特征是以阳离子（碳正离子）作为活性中心引发单体进行链增长。该反应通常适用于带有强给电子取代基（如烷氧基、烷基、苯基等）的烯烃单体，这些取代基能够稳定反应过程中产生的碳正离子中间体，使聚合得以顺利进行。
阳离子聚合包含三个主要阶段：
引发（Initiation）：
由引发剂（通常为强质子酸或路易斯酸）产生质子（H⁺）或碳正离子。例如，路易斯酸（如 AlCl₃、BF₃）常与助引发剂（如水、醇）共同作用生成活性引发物种：
$$ce{ BF3 + H2O -> H^+(BF3OH)^- }$$
该质子随后进攻单体（如异丁烯）的双键，生成碳正离子活性中心：
$$ce{ H^+ + CH2=C(CH3)2 -> CH3-C^+(CH3)2 }$$
增长（Propagation）：
活性碳正离子中心持续与单体分子加成，使碳链不断延长：
$$ce{ sim CH2-C^+(CH3)2 + CH2=C(CH3)2 -> sim CH2-C(CH3)2-CH2-C^+(CH3)2 }$$
终止（Termination）：
活性链可通过多种途径失活，常见方式包括：
Cationic polymerization（阳离子聚合）是一种链式聚合反应，其活性中心为带正电荷的阳离子。以下是详细解释：
阳离子聚合是通过阳离子引发剂（如路易斯酸、质子酸）活化单体，形成阳离子活性中间体，随后单体逐步加成形成高分子链的过程。这类反应通常需要低温条件以稳定高活性的阳离子中间体。
主要适用于含供电子基团的单体，例如：
聚合反应的概念由德国化学家Hermann Staudinger在1920年代提出，阳离子聚合作为其分支之一，后续在催化剂和反应条件优化方面得到发展。
阳离子聚合通过阳离子中间体实现单体聚合，需特定引发剂和单体类型，广泛应用于高性能材料制备。
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