Spontaneous synthesis of a homogeneous thermoresponsive polymer network composed of polymers with a narrow molecular weight distribution

Spontaneous synthesis of a homogeneous thermoresponsive polymer network composed of polymers with a narrow molecular weight distribution
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由窄分子量分布聚合物组成的均质热响应聚合物网络的自发合成

DOI:
10.1038/s41427-018-0074-x
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发表时间:
2018
期刊:
影响因子:
9.7
通讯作者:
Takeoka Yukikazu
Takeoka Yukikazu
中科院分区:
材料科学2区
文献类型:
--
作者:
Jochi Yuto;Seki Takahiro;Soejima Takamasa;Satoh Kotaro;Kamigaito Masami;Takeoka Yukikazu

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我们已经开发了一种方法,通过简单地混合必要的化合物来获得由相对均匀的网络结构组成的聚合物凝胶,该网络结构由具有窄分子量的聚合物组成。在该方法中,将具有快速反应速率的自由基链聚合反应与具有与聚合反应相比足够慢的反应速率的自由基加成交联反应组合。对于聚合反应,使用具有严格控制的聚合引发位点数目的多官能引发剂来制备具有由活性自由基聚合确定的链数和长度的星星聚合物。在交联反应中,使用多官能封端剂,通过活性自由基聚合从具有窄分子量的聚合物制备星星聚合物,然后使用封端反应与多个聚合物链偶联。结果,只有当所有化合物混合并在恒温下静置时,才顺序发生具有极大不同动力学的两种反应,并且固有地构建了包含具有低分子量分布的交联聚合物的相对均匀的网络结构。
We have developed a method to obtain a polymer gel consisting of a relatively homogeneous network structure composed of polymers with a narrow molecular weight simply by mixing the necessary compounds. In this method, a radical chain polymerization reaction with a fast reaction rate is combined with a radical addition cross-linking reaction that has a sufficiently slow reaction rate compared with the polymerization reaction. For the polymerization reaction, a multifunctional initiator with a strictly controlled number of polymerization initiation sites was used to prepare a star polymer with a chain number and length determined by living radical polymerization. In the cross-linking reaction, a multifunctional terminating agent was used to prepare a star polymer from a polymer with a narrow molecular weight via living radical polymerization followed by coupling with multiple polymer chains using a termination reaction. As a result, two kinds of reactions with greatly different kinetics occurred sequentially only when all of the compounds were mixed and allowed to stand at a constant temperature, and a relatively homogeneous network structure comprising cross-linked polymers with a low molecular weight distribution was inherently constructed.
控制水中 N-异丙基丙烯酰胺的快速 ATRP
DOI: --
发表时间: 2009
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RAFT 聚合:添加到图片中
DOI: --
发表时间: 2007
期刊:
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