Novel Liquid-Crystalline Polymeric Materials via Noncovalent “Grafting” .
Novel Liquid-Crystalline Polymeric Materials via Noncovalent “Grafting” .
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DOI：
10.1002/chin.199303291
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发表时间：
1993-01
期刊：
影响因子：
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通讯作者：
C. Bazuin;F. Brandys
中科院分区：
文献类型：
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作者：
C. Bazuin;F. Brandys
传统上，液晶（LC）聚合物被分类为主链或侧链类型。1-2为了更好地解释这些材料的多样性，现在包括不能严格分类为侧链或主链的例子，Brostow 3提出了一种基于形成LC聚合物的结构亚基的不同结构排列的分类方案。已经确定了20个类别。令人惊讶的是，在所有情况下，结构亚基都是通过共价键连接的。我们认为，通过使用各种类型的非共价键，可以大大扩展液晶聚合物的种类。这些非共价键可以通过氢键相互作用、静电相互作用（例如，离子-离子、离子-偶极、电荷转移）和配位络合物或过渡金属离子形成。该概念的理想化示意图（针对离子-离子键合和经典侧链聚合物结构进行说明）可显示如下：4
Traditionally, liquid-crystal (LC) polymers have been classified as main-chain or side-chain types. 1-2 In an attempt to better account for the variety in these materials, which now include examples which cannot be classified as strictly side-chain or main-chain, Brostow3 has proposed a classification scheme based on different architectural arrangements of the structural subunits forming the LC polymer. Twenty classes have been identified. It is striking that in all cases the structural subunits are connected by covalent bonds. We would like to suggest that the variety in LC polymers can be considerably ex-tended through the use of noncovalent bonds of various types. These noncovalent bonds can be formed by hydrogen bonding interactions, electrostatic interactions (eg, ion-ion, ion-dipole, charge transfer), and coordination complexes or transition-metal ions. An idealized schematic of this concept, illustrated for ion-ion bonding and for a classical side-chainpolymer architecture, may be shown as follows: 4