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The RAFT polymerization of NIPAM exhibited pseudo-first-order kinetics and a linear molecular weight dependence on monomer conversion.

NIPAM的原位RAFT聚合为一级反应动力学,分子量随聚合时间的增加呈线性增长。

It is to say that the patch of RAFT agent on the hairy chains.PS particles with the shell of copolymer of styrene and vinylbenzyl chloride were prepared by similar seeded and starved addition processes. RAFT agent with carboxyl end-group attached on the shell surface of PS particles by group reaction. Adding NIPA and photo-initiator into the continuous phase of polymerization system, hairy PNIPA were obtained.

最后,以表面负载一层乙烯基苄氯的亚微米级单分散聚苯乙烯微球为基质,将水溶性RAFT试剂与聚苯乙烯微球表面的官能团反应以负载到其表面,再在连续相中直接引入NIPA和光引发剂,RAFT聚合得到PNIPA毛发。

The results showed the different fluorescence property with naphthalene due to the interaction, congruence of the molecules and formation of inter- or intramolecular exciplex.;A series of dithioesters with different aromatic rings such as naphthally, anthracyl and pyrene in R groups were synthesized. The polymerizations of MMA using these dithioesters as the RAFT agents were investigated.

结果表明:在NMNDT和它获得的聚合物溶液中,由于分子间的相互作用、叠合,激发态分子与基态分子形成了激基缔合物,引起了萘环荧光的淬灭,使其发光特性与原来萘的发光特性不同;探索了二硫代酯中R基团的立体和电子等性能对MMA的RAFT聚合的影响。

The controlled/living radical polymerization of methacrylates containing carbazolyl or 1,3,4-oxadiazolyl groups via RAFT polymerization was successfully demonstrated. Functional polymers poly, poly, poly, and poly with hole- or electron-transfer ability were synthesized with cumyl dithiobenzoate as a chain transfer agent and AIBN as an initiator in a benzene solution.

以合成的二硫代苯甲酸酯异丙苯酯为链转移剂、偶氮二异丁腈为引发剂,通过RAFT可控/活性自由基聚合方法成功地合成了侧链上悬垂空穴传输基团或电子传输基团(1,3,4-噁二唑基团)的光电功能聚合物:poly、poly和poly、poly。

In spite of this, the preparation of thiol-end functionalized PMMA was achieved by introducing a short block of polystyrene after the RAFT polymerization of MMA.Third, RAFT technique was applied to design and synthesize some well-defined poymers. Five monomers, lauryl methacrylate,(N,N-dimethylamino)ethyl methacrylate, poly methyl ether methacrylate, 4-(4\'-cyanobiphenyl-4-yloxy) butyl methacrylate and 2-ethyl methacrylate were chosen to RAFT homopolymerization or copolymerizations mediated by cumyl dithiobenzoate.

RAFT方法在具有特定结构聚合物的设计与合成上的应用,在机理研究的基础上,本论文选择五种不同结构的甲基丙烯酸酯类单体:lauryl methacrylate,(N,N-dimethylamino)ethyl methacrylate,polymethyl ether methacrylate,4-(4'-cyanobiphenyl-4-yloxy)butyl methacrylate和2-ethyl methacrylate,用CDB调控RAFT聚合的方法设计合成了一些特定结构的聚合物,详细而深入地研究了它们的均聚、共聚动力学,发现了双硫酯并非在聚合反应初期就全部转化,而是随着反应进行逐步消耗,这与理想的活性聚合体系有很大差别。

We prepared a serious of functional polymers with RAFT method.First we synthesize a tri-block polymer.One end is hydrophobic PMMA and the other end is hydrophilic PtAA,the middle is the functional epoxy group,which can be fluorinate by CF_3COOH.

本文运用RAFT方法合成了一系列不同链长比例的三嵌段共聚物:聚—聚—聚(PMMA-b-PGMA-b-PtBMA),然后利用GMA中含有的环氧官能团,合成含氟的一段,最后将PtBMA一段酸解为亲水段PtAA,即形成了双亲双憎的嵌段共聚物。

To get more insight into the mechanism and kinetics of the RAFT process,it would be helpful to build a small molecular model reaction mimicking the RAFT process but free of a chain-propagation event. We hereby propose a model cross reaction between dithioester and alkoxyamine as a probe of the RAFT process,in which the alkoxyamine plays the role of the radical source.The generating rate of the transient alkyl radical and the nitroxyl radical can be described by the law of persistent radical effect.Thus,the advantage of the model cross reaction is that it affords a radical concentration determined by the known equation of the persistent radical effect.

为了更深入的理解RAFT聚合过程,我们构建了一个模型反应:即由烷氧基胺与双硫酯进行交换反应,烷氧基胺均裂产生的烷基自由基将会向双硫酯进行链转移,双硫酯的引入对纯烷氧基胺分解动力学造成的影响可以提供RAFT过程的许多信息。

The possible mechanism was discussed. These bowl-shaped aggregates are promising candidates for nano reactor or drug carrier.4 2,7-dimethylene-1,4,6-trioxaspiro[4, 4]nonane with two vinyls was prepared to be used as electron-donor and crosslinker. The ATRP of this crosslinker and excess methylacrylate (used as electron-accpetor) was proved to mainly form homopolymers. With the chain-transfer agent S-1-Dodecyl-S\'-(α,α\'-dimethyl-α-acetic acid)trithiocarbonate, the copolymerization of the spiro hydrocarbon, maleic anhydride and MA by RAFT method produced star PMA.

这些由聚电解质复合物自组装形成的聚集体,在微反应器和药物释放等领域具有潜在的应用前景。4合成了双乙烯基的2,7-二亚甲基-1,4,6-三氧杂螺环烷,作为给电子单体和交联剂,与吸电子单体马来酸酐或过量的丙烯酸甲酯形成电荷转移络合物共同聚合,尝试了用ATRP和RAFT方法一步法合成星形聚合物。

Dithioester and trithiocarbonate RAFT reagents were synthesizedby different methods, and were used for the polymerization of styrene ormethacrylates, by thermal, thermo-initiator and photo-initiation.

针对这一问题,本文尝试用三种方法合成了结构不同的RAFT试剂,考察了热引发、引发剂引发以及紫外光引发条件下,二硫酯/三硫酯调控的常见单体苯乙烯以及丙烯酸酯的RAFT聚合。

A series of polymers containing 1,8-naphthalimide moieties in the side chains have been prepared via RAFT technique. Firstly, five styrene and two methyl acrylate based 1,8-naphthalimide monomers were synthesized and characterized. Then, carbazyl group terminated polystyrene was used as macromolecular RAFT agent.

我们合成了5种苯乙烯类和2种甲基丙烯酸酯类萘酰亚胺单体,以一种含末端带咔唑结构的聚苯乙烯为大分子RAFT试剂,考察了所得单体的RAFT聚合,发现苯乙烯类1,8-萘酰亚胺单体可以聚合,但是聚合度不高,甲基丙烯酸酯类1,8-萘酰亚胺单体RAFT聚合不可控。

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