超越简单的 AB 两嵌段共聚物：双官能和三官能 RAFT 试剂在水中 PISA 中的应用。
Beyond Simple AB Diblock Copolymers: Application of Bifunctional and Trifunctional RAFT Agents to PISA in Water.
机构信息
Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, UMR 8232, Equipe chimie des polymères, F-75252, Paris, Cedex 05, France.
Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, UMR 7197, F-75252, Paris, Cedex 05, France.
出版信息
Macromol Rapid Commun. 2019 Jan;40(2):e1800315. doi: 10.1002/marc.201800315. Epub 2018 Jun 20.
The influence of the macromolecular reversible addition-fragmentation chain transfer (macro-RAFT) agent architecture on the morphology of the self-assemblies obtained by aqueous RAFT dispersion polymerization in polymerization-induced self-assembly (PISA) is studied by comparing amphiphilic AB diblock, (AB) triblock, and triarm star-shaped (AB) copolymers, constituted of N,N-dimethylacrylamide (DMAc = A) and diacetone acrylamide (DAAm = B). Symmetrical triarm (AB) copolymers could be synthesized for the first time in a PISA process. Spheres and higher order morphologies, such as worms or vesicles, could be obtained for all types of architectures and the parameters that determine their formation have been studied. In particular, we found that the total DP of the PDMAc and the PDAAm segments, i.e., the same overall molar mass, at the same M (PDMAc)/M (PDAAm) ratio, rather than the individual length of the arms determined the morphologies for the linear (AB) and star shaped (AB) copolymers obtained by using the bi- and trifunctional macro-RAFT agents.
通过比较由 N,N-二甲基丙烯酰胺（DMAc = A）和二丙酮丙烯酰胺（DAAm = B）组成的两亲性 AB 嵌段、（AB）三嵌段和三臂星形（AB）共聚物，研究了大分子可逆加成-断裂链转移（macro-RAFT）剂结构对通过水相 RAFT 分散聚合在聚合诱导自组装（PISA）中获得的自组装形态的影响。首次在 PISA 过程中合成了对称三臂（AB）共聚物。对于所有类型的结构，都可以得到球体和更高阶的形态，例如蠕虫或囊泡，并且已经研究了决定它们形成的参数。特别是，我们发现，对于通过双官能和三官能大分子 RAFT 试剂获得的线性（AB）和星形（AB）共聚物，决定形态的是 PDMAc 和 PDAAm 段的总 DP，即相同的总摩尔质量，在相同的 M（PDMAc）/M（PDAAm）比下，而不是臂的单独长度。
Zotero 插件