Broadband polarizing films by photopolymerization-induced phase separation and in situ Swelling
Broadband polarizing films by photopolymerization-induced phase separation and in situ Swelling
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DOI：
10.1063/1.2838299
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发表时间：
2008-02
影响因子：
4
通讯作者：
B. Fan;S. Vartak;J. Eakin;S. Faris
中科院分区：
文献类型：
--
作者：
B. Fan;S. Vartak;J. Eakin;S. Faris
这封信描述了由包含交联液晶聚合物和非交联低分子量液晶的共混物制备的交联液晶膜的光谱增宽。经光聚合后，加宽的反射带的带宽可以增加几倍。光谱增宽是由于在薄膜厚度上形成梯度间距而引起的。结果表明，相分离和原位溶胀是所得膜结构的重要机制。
This letter describes the spectral broadening of cholesteric liquid crystal films prepared from a blend comprising a cross-linkable liquid crystal polymer and a noncross-linkable low-molecular-weight liquid crystal. The bandwidth of the broadened reflection band can be increased by several times upon photopolymerization. The spectral broadening arises from the formation of gradient pitch across the film thickness. It is shown that both phase separation and in situ swelling are important mechanisms for the resulting film structure.