陽離子催化聚合作用
In this review, we focus on the progress in synthesis of new block polymers and multi block polymers by living cationic polymerization.
本綜述主要介紹利用活性陽離子聚合合成二、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.
綜述了國内外利用活性正離子聚合轉化法合成嵌段聚合物的研究進展。
Experimental results showed that radical-cationic hybrid UV curing system, which combines the advantages of radical and cationic polymerization, gives a better synergy effect.
混雜光固化體系是指在同一體系中采用兩種或兩種以上不同類型的聚合反應使體系固化的方法。
C5 petroleum resin was synthesized by cationic polymerization with C5 fractions as raw materials.
以C5餾分為原料，采用正離子聚合反應，經過原料預處理、熱聚合、正離子聚合等工序合成了C5石油樹脂。
In this paper, we summarize mainly the chemical initiating methods for grafting in three categories: free radical, anionic and cationic polymerization.
着重總結了接枝的化學引發方法，分自由基、 陽離子、 陰離子聚合引發體系三大類進行讨論。
The total yield of resins made by the two-step method of radical and cationic polymerization is higher than 60%.
采用自由基和陽離子兩步聚合法使石油樹脂總收率提高到60％以上。
Moreover, cationic polymerization of DVB also can happen in the condition.
此外，DVB在還會發生陽離子型自聚反應。
This review with 40 references describes recent advances concerning applications of proton trap in the cationic polymerization.
本文介紹了質子捕捉技術在陽高子聚合中的應用及最新研究工作進展。
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.
實現活性碳陽離子聚合的一個關鍵點就在于向反應體系中加入某種添加劑，例如給電子化合物、铵鹽等。
The cationic polymerization initiator.
離子聚合的引發劑。
Photoinitiator of cationic polymerization is a new type of high efficient photoinitiators used in UV curing applications.
陽離子型光引發劑是一類新型的紫外光固化材料的引發劑。
One of the most important breakthroughs in cationic polymerization in 1980s is perhaps the discovery of living cationic polymerization.
在80 年代，陽離子聚合研究的一個最重要突破可能就是活性陽離子聚合。
The results showed that:There were not obvious retarding effects of the conventional cationic surfactant 1227 and cationic polymerization surfactant dyeing modified polyester ;
研究結果表明：傳統的陽離子表面活性劑1227和聚合陽離子表面活性劑對改性滌綸的上染沒有明顯的緩染作用；
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年代以來活性碳陽離子聚合出現以後的發展狀況及在新單體和新引發劑的探索過程中的進展。
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 .
簡介了國外采用陽離子乳化劑乳聚或用陽離子型表面活性劑對陰離子膠乳轉換生産陽離子SBR膠乳的方法。
Figure 7 … Several monomers for cationic ring…opening polymerization.
圖7 …幾種陽離子開環聚合的單體。
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************-高氯酸為催化劑，通過************的陽離子開環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.
研制成功一種穩定的水性共聚乳液，它是在自由基型聚合和陽離子型催化縮聚的共同體系中反應制得的。
Structure characterization and mechanism study showed that, after the color change, new active center formed and polymerization changed from coordination to cationic mechanism.
從聚合物的結構表征及機理探讨表明：顔色突變後，體系産生了新的活性中心，催化機理發生了轉變——由配位機理轉變為陽離子機理。
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陽離子型聚************是國外80年代末期的先進技術，而國内一直沒有相關報道。
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*********氯化铵作為陽離子添加劑應用于彩色噴墨打印紙塗層中并測定成紙的各項性能。
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陽離子型共聚物的方法；
Hybrid UV curing system includes free radical cationic hybrid UV curing system, Free radical condensation polymerization system and free radical free radical system.
混雜光固化體系包括自由基陽離子混雜光固化體系、自由基縮聚混雜體系和自由基自由基混雜體系等。
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）為原料，通過反相乳液聚合，制得陽離子型稠化劑GD-1。
陽離子聚合（Cationic Polymerization）是一種重要的鍊式聚合反應，其核心特征是以陽離子（碳正離子）作為活性中心引發單體進行鍊增長。該反應通常適用于帶有強給電子取代基（如烷氧基、烷基、苯基等）的烯烴單體，這些取代基能夠穩定反應過程中産生的碳正離子中間體，使聚合得以順利進行。
陽離子聚合包含三個主要階段：
引發（Initiation）：
由引發劑（通常為強質子酸或路易斯酸）産生質子（H⁺）或碳正離子。例如，路易斯酸（如 AlCl₃、BF₃）常與助引發劑（如水、醇）共同作用生成活性引發物種：
$$ce{ BF3 + H2O -> H^+(BF3OH)^- }$$
該質子隨後進攻單體（如異丁烯）的雙鍵，生成碳正離子活性中心：
$$ce{ H^+ + CH2=C(CH3)2 -> CH3-C^+(CH3)2 }$$
增長（Propagation）：
活性碳正離子中心持續與單體分子加成，使碳鍊不斷延長：
$$ce{ sim CH2-C^+(CH3)2 + CH2=C(CH3)2 -> sim CH2-C(CH3)2-CH2-C^+(CH3)2 }$$
終止（Termination）：
活性鍊可通過多種途徑失活，常見方式包括：
Cationic polymerization（陽離子聚合）是一種鍊式聚合反應，其活性中心為帶正電荷的陽離子。以下是詳細解釋：
陽離子聚合是通過陽離子引發劑（如路易斯酸、質子酸）活化單體，形成陽離子活性中間體，隨後單體逐步加成形成高分子鍊的過程。這類反應通常需要低溫條件以穩定高活性的陽離子中間體。
主要適用于含供電子基團的單體，例如：
聚合反應的概念由德國化學家Hermann Staudinger在1920年代提出，陽離子聚合作為其分支之一，後續在催化劑和反應條件優化方面得到發展。
陽離子聚合通過陽離子中間體實現單體聚合，需特定引發劑和單體類型，廣泛應用于高性能材料制備。
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