
[高分子] 陰離子聚合
The effect of THF on the kinetics of the anionic polymerization of styrene in Cyclohexane was stu***d.
本文研究了四氫呋哺對環已烷中*********陰離子聚合動力學的影響。
Continuous carbon fiber reinforced monomer casting (MC) nylon(CCF/MCPA for short)composites have been prepared by anionic polymerization of caprolactam(CL).
根據堿催化陰離子聚合原理制備了連續碳纖維增強單體澆鑄(MC)尼龍複合材料(CCF/MCPA)。
Possibility reaction mechanism was proposed, which could be used to explain the spontaneous termination reaction in anionic polymerization of buta***ne in the presence of polar additives.
對這些破壞活性中心的反應所提出來的反應機理,可以用于解釋*********陰離子聚合中的自發終止現象。
Based on the general synthesis of SBS by anionic polymerization mechanism, we have carried out the copolymerization of SBS with several polar monomers by conversion of end-group of SBS.
本論文研究目标是在常規陰離子聚合方法合成SBS的基礎上,通過端基轉化實現了SBS與極性單體共聚。
In the course of anionic polymerization, there are a few transfer reactions and oligomer formation.
陰離子聚合過程中往往存在轉移反應,會生成低分子量齊聚物。
Via calculating systematic energy of anionic polymerization on ethyl acrylate and its derivative in solvents with different ***lectric constants, gain activation energy of this initiation reaction.
通過不同介電常數溶劑中*********乙酯及其衍生物陰離子聚合反應體系能量的計算,求得了此引發反應的活化能。
The development of high-performance rubber and nanoporous functional polymer materials started a new field of application of anionic polymerization.
高性能節能橡膠和各種納米孔狀功能聚合物材料的發展給陰離子聚合提供了新的機遇。
Furthermore, through the study of anionic polymerization of TBMA, it was found that TBMA can undergo living anionic polymerization at 10℃ using 1,1 diphenyl hexyl lithium (DPHL) as initiator.
進而對TBMA進行陰離子聚合研究。 結果表明,用1,1二苯基己基锂(DPHL)為引發劑,其可在10℃下實現活性陰離子聚合。
This paper introduces the complexation and dissociation of different Lewis bases with active species in the area of anionic polymerization reported in literatures and elucidates their applications.
介紹和評述了文獻中有關路易氏堿在陰離子聚合中對活性中心的絡合和解締作用。
The experimental results showed that the mechanism of anionic polymerization of buta***ne was also fit for the anionic polymerization of isoprene.
研究表明,*********聚合機理原則上同樣適用于************的負離子聚合。
Then, living PS was prepared via living anionic polymerization, with cyclohexane as solvent, THF as dissociation agent, and butyl lithium as initiator.
然後,采用活性陰離子方法,以*********為溶劑,************為解締劑,*********锂為引發劑引發*********聚合,制備活性聚*********。
The anionic polymerization of alkyl(meth) acrylates, as well as the synthesis of different polymers and their applications were reviewed with 38 references.
綜合分析了近年來有關(甲基)*********烷基酯負離子聚合所取得的成就,包括該類單體對負離子聚合的意義、聚合難點和解決辦法。
Star-type polybuta***ne was synthesized by anionic polymerization using commercial divinylbenzene ( DVB ) as coupling agent.
以工業二*********苯(DVB)為偶聯劑,用陰離子聚合法合成了星形聚*********。
Emphasizing the means of synthesis of star block copolymer of SIB, IB, IBI, SIS, and it is advanced that the anionic polymerization of star block copolymer is promising.
重點評述了星型嵌段聚合物SIB、IB、IBI、SIS的研制方法,提出應用陰離子聚合方法合成星型聚合物的巨大潛力以及目前的任務。
The effects of various parameters on kinetics of the anionic polymerization of CL in the presence of PPO are reported.
在此基礎上,對PPO介質中己内酰胺(CL)的聚合動力學的各種影響因素進行探讨。
The anionic polymerization of caprolactam was carried out with NaOH as catalyst and acyllactam - ended polyether as macroactivator.
以************為催化劑、端酰基内酰胺基聚醚為活化劑,引發己内酰胺陰離子聚合。
Results showed that the polymerizations followed the classic theory of the anionic polymerization before 4% of the conversion.
結果表明:當聚合轉化率小于4%時,聚合反應機理完全符合經典陰離子活性聚合的理論;
The mechanism of anionic polymerization of isoprene with cyclohexane and dioxane as solvent was stu***d and improved by experiment.
推導了************在環已烷-二氧六環混合溶劑中的負離子聚合機理,并通過實驗進行了驗證。
The anionic polymerization of alkyl(meth)acrylates, as well as the synthesis of different polymers and their applications were reviewed with 38 references.
綜合分析了近年來有關(甲基)*********烷基酯負離子聚合所取得的成就,包括該類單體對負離子聚合的重要意義、聚合難點和解決辦法。
Hexamethylphosphoric triamide(HPT) was added as toughened modifier in anionic catalytic polymerization of caprolactam to prepare modified MC nylon.
介紹在己内酰胺陰離子催化聚合反應中,添加*********磷酰三胺作增韌改性劑制備改性MC尼龍。
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 synthesis of oxyethylene oxypropylene copolyethers used for quenchant was stu***d by using anionic ring opening polymerization, diol or triol as the starting agent and KOH as the catalyst.
研究了以KOH為催化劑,二元或三元醇為起始劑,采用陰離子開環聚合合成淬火劑用共聚醚。結果表明:産物的分子量隨起始劑和雜質量的減少而增加;
According to the relations of polymerization velocity and viscosity average molecular weight versus conversion, the mechanism of D4 anionic ring-opening polymerization in miniemulsion was developed.
通過聚合速率和粘均分子量隨轉化率的變化關系提出了D_4陰離子開環細乳液聚合機理;
To study the radical character of naphthalene lithium, which is a classical anionic initiator, the polymerization of vinyl acetate was initiated by it.
為研究陰離子聚合引發劑萘锂絡合物是否可引發自由基聚合,進行了萘锂絡合物引發醋酸乙烯聚合的實驗。
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。
An anionic protein retanning agent has been prepared from collagen hydrolysate by amidation with maleic anhydride and co-polymerization with acrylic acid.
将膠原水解物用************酸化後與*********共聚,可制得一種陰離子蛋白複鞣劑。
陰離子聚合(anionic polymerization)是一種鍊式聚合反應,其活性中心為陰離子(如碳負離子)。該反應通常由強堿性引發劑(如有機金屬化合物)啟動,適用于含有吸電子基團的單體(如苯乙烯、丁二烯等)。以下是其核心特點及機制:
陰離子聚合屬于活性聚合(living polymerization)的一種,具有無終止、無鍊轉移的特性。這意味着當單體消耗完畢後,聚合物鍊末端仍保持活性,可繼續引發新單體聚合,形成結構可控的聚合物(如嵌段共聚物)。
主要用于合成高性能彈性體(如SBS橡膠)、嵌段共聚物及功能化高分子材料。其活性特性也常用于制備窄分布聚合物。
如需更深入的機理或具體案例,可參考高分子化學教材或專業文獻。
詞性: 名詞
發音: [ˌæn.iˈɑː.nɪk pəˌlɪm.ər.aɪˈzeɪ.ʃən]
定義: 一種聚合反應,其中由負離子引發劑引發的單體分子依次附加到聚合物鍊的末端,形成線性高分子。
例句:
用法:
該術語通常用于聚合物化學和材料科學領域,用于描述由負離子引發劑引發的聚合反應。
解釋:
陰離子聚合是一種由負離子引發劑引發的聚合反應,其中單體分子依次附加到聚合物鍊的末端,形成線性高分子。由于該過程中沒有任何副反應或副産物的産生,因此該方法可以用于制備高純度的聚合物。此外,由于陰離子聚合是一種非常靈活的技術,可以通過不同的引發劑、單體和反應條件來合成各種聚合物。
近義詞:
反義詞:
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