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Study on Novel Multicoponent Polymer Networks

新型多组分聚合物网络的研究

基本信息

批准号：
11695040
负责人：
TEZUKA Yasuyuki
金额：
$ 1.92万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

We have proposed a novel methodology (electrostatic self-assembly and covalent fixation) to produce various non-linear polymer topologies, including multicomponent polymer networks, with exceptionally high efficiency by exploiting the self-assembly principle to preorganize linear polymer precursors and subsequently converting them into covalently linked permanent structures. Thus new telechelic polymer precursors having moderately strained cyclic onium salt groups, including five-membered cyclic or six-membered bicyclic ammonium salt groups, as single or both end groups were prepared and subjected to an ion-exchange reaction to introduce multifunctional carboxylate anions as a counteranion. The electrostatically self-assembled products were then subjected, either directly or after subsequent manipulation, to heat treatment to convert the ionic interaction into the covalent linkage through the ring-opening reaction of the cyclic ammonium salt group by the carboxylate counteranion to pro … More duce a variety of branched and network homopolymers and copolymers with the precisely controlled structures. Furthermore, we have developed efficient initiators for the synthesis of a trifunctionally living poly(THF) and of a bifunctionally living poly (THF) having an additional functional group, and subsequent end-capping reaction for the synthesis of star-shaped telechelic and α, ω, kentro-telechelic polymers.We have also applied this "electrostatic self-assembly and covalent fixation" strategy for designing various non-linear polymer topologies, including monocyclic and polycyclic polymers, cyclic macromonomers and cyclic telechelics (kyklo-telechelics) and polymeric topological isomers. Thus, a variety of electrostatic self-assemblies of these polymer precursors, formed particularly in a diluted organic solution, was subjected to the heat treatment to convert the ionic interaction into the covalent linkage by the ring-opening reaction, to produce topologically unique, non-linear polymer architectures in high efficiency. Less

我们已经提出了一种新的方法（静电自组装和共价固定），以生产各种非线性聚合物拓扑结构，包括多组分聚合物网络，具有非常高的效率，通过利用自组装原理预组织线性聚合物前体，随后将其转化为共价连接的永久结构。因此，制备了具有适度应变的环状鎓盐基团（包括五元环状或六元双环铵盐基团）作为单个或两个端基的新型遥爪聚合物前体，并使其经历离子交换反应以引入多官能羧酸根阴离子作为抗衡阴离子。静电自组装产物然后直接或在随后的操作之后进行热处理，以通过羧酸根抗衡阴离子对环铵盐基团的开环反应将离子相互作用转化为共价键，从而形成共价键。 ...更多信息得到了多种结构精确可控的支化和网络化均聚物和共聚物。此外，我们还开发了一种有效的引发剂，用于合成三官能度活性聚（THF）和具有额外官能团的双官能度活性聚（THF），以及随后的封端反应，用于合成星形遥爪和α，ω，kentro-telechelic聚合物。我们还将这种“静电自组装和共价固定”策略应用于设计各种非线性聚合物拓扑结构，包括单环和多环聚合物、环状大分子单体和环状遥爪（Kyklo-遥爪）和聚合物拓扑异构体。因此，这些聚合物前体的各种静电自组装体，特别是在稀释的有机溶液中形成的，经受热处理以通过开环反应将离子相互作用转化为共价键，从而高效地产生拓扑上独特的非线性聚合物结构。少