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Long-range lamellar formation in blends of divided-lamellar-forming liquid crystal block copolymers with liquid crystal homopolymers
Polymer ( IF 4.1 ) Pub Date : 2020-09-29 , DOI: 10.1016/j.polymer.2020.123086
Mikihiro Hayashi , Junpei Kuribayashi , Masatoshi Tokita

Well-ordered long-range lamellar microdomain morphology is a characteristic of liquid crystal (LC) block copolymers comprising a middle main-chain type LC block connected to amorphous coil blocks at both ends. However, LC block copolymers at amorphous block volume fractions greater than 0.5 aggregate the LC blocks into laterally short lamellae divided by the amorphous blocks. In this study, it was proven that the divided lamellae can be transformed into long-range ordered lamellae by adding an LC homo-polymer into the divided-lamellar-forming LC block copolymer. The lamellar spacing was found to increase with the molecular weight of the coil block. These blends offer an easier method for preparing large-spaced long-range ordered lamellar structures using LC block copolymers.



中文翻译:

分层形成型液晶嵌段共聚物与液晶均聚物共混物中的远距离层状形成

有序的长距离层状微区形态是液晶(LC)嵌段共聚物的特征,该共聚物包括在两端连接到非晶线圈嵌段的中间主链型LC嵌段。然而,无定形嵌段体积分数大于0.5的LC嵌段共聚物将LC嵌段聚集为被无定形嵌段划分的侧向短薄片。在这项研究中,证明了通过将LC均聚物添加到形成分层的LC嵌段共聚物中,可以将分裂的薄片转变为长程有序薄片。发现层间距随着线圈块的分子量而增加。这些共混物提供了一种使用LC嵌段共聚物制备大间距长距离有序层状结构的简便方法。

更新日期:2020-10-05
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