链转移反应

Al（i-Bu）2H的链转移反应使得聚合产物的分子量较低；

The of the polymer obtained is lower because Al ( i-Bu ) 2H has high ability of chain transfer .

结果表明，ROK的添加使体系发生了明显的链转移反应，2G的添加对链转移有促进作用。

The results show that ROK can evidently accelerate the chain transfer reaction and 2G has some positive effect on it too .

一方面，铝氧烷中反应性较弱的Al一Et键，减弱了活性中心向铝的链转移反应；

On one side , the weak reactivity of Et-Al bond of EAO reduce the chain-transfer reaction to aluminum site of activator ;

聚合反应后期分子量分布加宽主要是由于向大分子RAFT试剂的链转移反应受扩散控制引起的。

Because the reaction of the polymeric RAFT agent was controlled by diffusion in the late stage of polymerization , PDI became rather broad .

完全抑制3′端加工及去整合反应所需ScFv的浓度高于链转移反应。

It was indicated that the ScFv concentration needed to abolish the 3 ′ end processing and disintegration reaction was higher than that of strand transfer activity .

其支化程度与离子对的结构，即炔酰胺上N原子相连取代基和路易斯碱的位阻大小有关，可通过对链转移反应的抑制控制支化程度。

The degree of branch structure is related to the ion-pair , which is the substituent group connected to N atom in alkyne , and the steric effect of the Lewis Base . The branch structure can be restrained by controlling the chain transfer reaction .

MoCl4-（i-Bu）2AlOCH3催化丁二烯聚合微观动力学的研究&Ⅱ.分子量与链转移反应

A study on microkinetics of butadiene polymerization with mocl_4 - ( i-bu ) _2alo ch_3 catalyst ⅱ . molecular weight and chain transfer reaction

采用聚合瓶反应考察了ROK、2G和温度对链转移反应的影响，并求取了链转移次数、链转移常数、链转移速率常数及链转移反应活化能。

Effects of ROK , 2G and polymerizing temperature were studied . The chain transfer times and constant , chain transfer rate constant and the corresponding activation energy were also calculated .

体系中可能存在向单体的链转移反应。

Probably there existed certain chain transfer to monomer in this system .

酚钾盐为助引发剂的异戊二烯调聚链转移反应研究

Study of chain transfer reaction of isoprene using potassium phenoxide as promoter

表面自由基链转移反应制备超薄聚合物膜

Preparation of Ultra-thin Polymer Films through Surface Radical Chain-Transfer Reaction

偶氮二异丁腈不参加链转移反应。

Azobisisobutyronitrile does not take part in transfer reactions .

烯烃聚合中金属化合物间的链转移反应

Chain Transfer Reaction between Metal Complexes in Olefin Polymerization

苯乙烯本体聚合动力学及链转移反应的研究

A Study of Kinetics of Bulk Polymerization of Styrene Monomer and Chain Transfer Reaction

这种自由基转移的反应称为链转移反应。

These radical displacement reactions are chain-transfer reactions .

环链转移反应及其在合成杂环化合物中的应用

Ring - Chain Transformation Reaction and its Application in the Synthesis of Heterocyclic Compounds

研究了通过自由基链转移反应原位接枝聚合物膜。

Surface chain transfer reaction was used to prepare end-grafted polymer films of nanometer dimensions .

自由基链转移反应与聚合物分子设计

Radical Chain Transfer Reaction and Polymer Design

大分子自由基间的偶合反应及向大分子的链转移反应使聚合产物不带有活性端基；

The intercoupling of macromolecular radicals and the chain transferring to macromolecules made the polymers lack reactive end groups .

建议用聚合度-时间曲线来决定是快引发还是慢引发，判断链转移反应的存在。

Time graph was suggested to be used to determine the type of initiation if there exists chain transfer reaction .

通过链转移反应，在大分子自由基链终止的同时，形成了单体自由基，后者仍可与粘胶体中的单体发生链的引发、增长及转移等过程。

Therefore , the chain transfer between the growing chain radical and monomer will be the only process of termination .

质子捕获作用，即亲核性试剂捕获质子，抑制质子的不可控引发和链转移反应；

B.The " proton-scavenging " & the removal of protic impurities by externally added nucleophiles and the elimination of " induced " chain transfer ;

以包含有向聚合物链转移反应的自由基均聚反应机理为例，根据矩法分别建立了单自由基和多自由基数学模型，所得单自由基模型清楚表明了模型存在的不封闭性；

A example , free-radical homopolymerization kinetics with transfer reaction to polymer chain , is presented . The monoradical and polyradical models are developed by moment method .

根据测得的数据，讨论了温度在活性衰减、链转移反应和活性中心生成中的作用。

Based on these data the effect of polymerization temperature on decay of catalyst activity , the chain transfer reaction and the formation of the active center were discussed .

本工作根据Pepper的反应机理，对电子转移引发的阴离子聚合反应以及单体链转移对这一反应的影响等问题作了理论处理，求得了分子量分布函数的精确解。

The molecular weight distribution of anionic polymerization system initiated by electron transfer and the influence of monomer transfer on the polymerization were treated theoretically . The exact expressions of molecular weight distribution function are derived according to Pepper 's kinetic scheme .

探讨了引发剂用量、链转移剂用量、反应温度等对共聚物阻垢性能的影响。

The effects of such factors as the dosage of initiator , dosage of chain transfer agent , and reaction temperature on the copolymer 's scale inhibiting capacity are discussed .

活性聚合活性聚合是指增长中心不会发生链终止和链转移的聚合反应。

Living polymerization are polymerizations in which propagation centers do not undergo either termination of tranfer .

磨耗不仅会导致高分子链的断裂，而且可能会发生链转移反应和大分子自由基的异构化反应。

The abrasion not only resulted in the fragmentation of macromolecule chain , but also would lead to chain transfer or isomerization .

计算了在不同聚合条件和各种催化剂组成时的链增长、对烷基铝链转移及链终止反应的速度常数。

The propagation , transfer and termination reaction rate constants have been calculated for different polymerization conditions and for catalysts of various compositions .

应用MonteCarlo方法模拟聚合反应中链增长和链交换反应速率常数，结果表明每一个活性中心接受约6个单体插入后发生链转移反应结束该聚合链增长。

Monte Carlo method has been developed to estimate the chain propagation constant and exchange reaction constant . In average , one exchange reaction will occur after approximate six monomer molecules insert into the growing chain .