
[高分子] 阴离子聚合
The effect of THF on the kinetics of the anionic polymerization of styrene in Cyclohexane was stu***d.
本文研究了四氢呋哺对环已烷中*********阴离子聚合动力学的影响。
Continuous carbon fiber reinforced monomer casting (MC) nylon(CCF/MCPA for short)composites have been prepared by anionic polymerization of caprolactam(CL).
根据碱催化阴离子聚合原理制备了连续碳纤维增强单体浇铸(MC)尼龙复合材料(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.
对这些破坏活性中心的反应所提出来的反应机理,可以用于解释*********阴离子聚合中的自发终止现象。
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.
本论文研究目标是在常规阴离子聚合方法合成SBS的基础上,通过端基转化实现了SBS与极性单体共聚。
In the course of anionic polymerization, there are a few transfer reactions and oligomer formation.
阴离子聚合过程中往往存在转移反应,会生成低分子量齐聚物。
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.
通过不同介电常数溶剂中*********乙酯及其衍生物阴离子聚合反应体系能量的计算,求得了此引发反应的活化能。
The development of high-performance rubber and nanoporous functional polymer materials started a new field of application of anionic polymerization.
高性能节能橡胶和各种纳米孔状功能聚合物材料的发展给阴离子聚合提供了新的机遇。
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.
进而对TBMA进行阴离子聚合研究。 结果表明,用1,1二苯基己基锂(DPHL)为引发剂,其可在10℃下实现活性阴离子聚合。
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.
介绍和评述了文献中有关路易氏碱在阴离子聚合中对活性中心的络合和解缔作用。
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,*********聚合机理原则上同样适用于************的负离子聚合。
Then, living PS was prepared via living anionic polymerization, with cyclohexane as solvent, THF as dissociation agent, and butyl lithium as initiator.
然后,采用活性阴离子方法,以*********为溶剂,************为解缔剂,*********锂为引发剂引发*********聚合,制备活性聚*********。
The anionic polymerization of alkyl(meth) acrylates, as well as the synthesis of different polymers and their applications were reviewed with 38 references.
综合分析了近年来有关(甲基)*********烷基酯负离子聚合所取得的成就,包括该类单体对负离子聚合的意义、聚合难点和解决办法。
Star-type polybuta***ne was synthesized by anionic polymerization using commercial divinylbenzene ( DVB ) as coupling agent.
以工业二*********苯(DVB)为偶联剂,用阴离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.
重点评述了星型嵌段聚合物SIB、IB、IBI、SIS的研制方法,提出应用阴离子聚合方法合成星型聚合物的巨大潜力以及目前的任务。
The effects of various parameters on kinetics of the anionic polymerization of CL in the presence of PPO are reported.
在此基础上,对PPO介质中己内酰胺(CL)的聚合动力学的各种影响因素进行探讨。
The anionic polymerization of caprolactam was carried out with NaOH as catalyst and acyllactam - ended polyether as macroactivator.
以************为催化剂、端酰基内酰胺基聚醚为活化剂,引发己内酰胺阴离子聚合。
Results showed that the polymerizations followed the classic theory of the anionic polymerization before 4% of the conversion.
结果表明:当聚合转化率小于4%时,聚合反应机理完全符合经典阴离子活性聚合的理论;
The mechanism of anionic polymerization of isoprene with cyclohexane and dioxane as solvent was stu***d and improved by experiment.
推导了************在环已烷-二氧六环混合溶剂中的负离子聚合机理,并通过实验进行了验证。
The anionic polymerization of alkyl(meth)acrylates, as well as the synthesis of different polymers and their applications were reviewed with 38 references.
综合分析了近年来有关(甲基)*********烷基酯负离子聚合所取得的成就,包括该类单体对负离子聚合的重要意义、聚合难点和解决办法。
Hexamethylphosphoric triamide(HPT) was added as toughened modifier in anionic catalytic polymerization of caprolactam to prepare modified MC nylon.
介绍在己内酰胺阴离子催化聚合反应中,添加*********磷酰三胺作增韧改性剂制备改性MC尼龙。
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 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为催化剂,二元或三元醇为起始剂,采用阴离子开环聚合合成淬火剂用共聚醚。结果表明:产物的分子量随起始剂和杂质量的减少而增加;
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.
通过聚合速率和粘均分子量随转化率的变化关系提出了D_4阴离子开环细乳液聚合机理;
To study the radical character of naphthalene lithium, which is a classical anionic initiator, the polymerization of vinyl acetate was initiated by it.
为研究阴离子聚合引发剂萘锂络合物是否可引发自由基聚合,进行了萘锂络合物引发醋酸乙烯聚合的实验。
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。
An anionic protein retanning agent has been prepared from collagen hydrolysate by amidation with maleic anhydride and co-polymerization with acrylic acid.
将胶原水解物用************酸化后与*********共聚,可制得一种阴离子蛋白复鞣剂。
阴离子聚合(anionic polymerization)是一种链式聚合反应,其活性中心为阴离子(如碳负离子)。该反应通常由强碱性引发剂(如有机金属化合物)启动,适用于含有吸电子基团的单体(如苯乙烯、丁二烯等)。以下是其核心特点及机制:
阴离子聚合属于活性聚合(living polymerization)的一种,具有无终止、无链转移的特性。这意味着当单体消耗完毕后,聚合物链末端仍保持活性,可继续引发新单体聚合,形成结构可控的聚合物(如嵌段共聚物)。
主要用于合成高性能弹性体(如SBS橡胶)、嵌段共聚物及功能化高分子材料。其活性特性也常用于制备窄分布聚合物。
如需更深入的机理或具体案例,可参考高分子化学教材或专业文献。
词性: 名词
发音: [ˌæn.iˈɑː.nɪk pəˌlɪm.ər.aɪˈzeɪ.ʃən]
定义: 一种聚合反应,其中由负离子引发剂引发的单体分子依次附加到聚合物链的末端,形成线性高分子。
例句:
用法:
该术语通常用于聚合物化学和材料科学领域,用于描述由负离子引发剂引发的聚合反应。
解释:
阴离子聚合是一种由负离子引发剂引发的聚合反应,其中单体分子依次附加到聚合物链的末端,形成线性高分子。由于该过程中没有任何副反应或副产物的产生,因此该方法可以用于制备高纯度的聚合物。此外,由于阴离子聚合是一种非常灵活的技术,可以通过不同的引发剂、单体和反应条件来合成各种聚合物。
近义词:
反义词:
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