期刊
POLYMER CHEMISTRY
卷 12, 期 7, 页码 1040-1049出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0py01424a
关键词
-
资金
- Agence Nationale de la Recherche [ANR-17-CE09-0031-01, ANR-19-CE06-0002-01]
- Agence Nationale de la Recherche (ANR) [ANR-19-CE06-0002, ANR-17-CE09-0031] Funding Source: Agence Nationale de la Recherche (ANR)
A straightforward process to produce well-defined dynamic networks of associative BAB triblock copolymers in water was reported. The copolymers consist of a hydrophilic poly(N,N-dimethylacrylamide) A block and two lateral associative statistical poly(diacetone acrylamide-co-N,N-dimethylacrylamide) B blocks. The viscosity of the samples is greatly affected by the content of N,N-dimethylacrylamide (DMAc) in the B block, resulting in the formation of thermoresponsive transient networks with maximum viscosity as a function of temperature.
We report a straightforward process to produce well-defined dynamic networks of associative BAB triblock copolymers through two successive polymerization steps conducted in one-pot and exclusively in water. The copolymers are composed of a hydrophilic poly(N,N-dimethylacrylamide) A block extended in a typical RAFT-PISA dispersion formulation with two lateral associative statistical poly(diacetone acrylamide-co-N,N-dimethylacrylamide) B blocks. The viscosity of the samples is strongly modified by the N,N-dimethylacrylamide (DMAc) content in the B block. This is attributed to the formation of a transient network for which the exchange dynamics of the B blocks between micelles and/or the number of bridges within the network depend on the DMAc content. Rheology analyses showed that transient networks are formed that exhibit a thermoresponsive behavior with a maximum viscosity as a function of temperature, presumably caused by a maximum of bond lifetime and/or number of elastically active chains.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据