Dynamical behavior and density of the Polymer / Liquid Crystal blends prepared by polymerization induced phase separation

2014 North African Workshop on Dielectic Materials for Photovoltaic Systems (NAWDMPV) Pub Date : 2014-12-29 DOI:10.1109/NAWDMPV.2014.6997603

Zair Latifa, M. Ulrich, Berrayah Abdelkader, Hadjou Bélaid Zakia

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引用次数: 1

Abstract

In this work we are interested with the dynamic behavior and density of PDLCs films (Polymer Dispersed Liquid Crystals).constituted of the microdroplets of nematic liquid crystal E7 dispersed in two types of polymer matrix; Tripropylene glycol diacrylate (TPGDA) or Propoxylene-glyceryl-triacrylate (GPTA). These films are prepared by polymerization induced phases separation by electron-beam (EB) or ultra-violet (UV) radiation. Films obtained are characterized by a Dynamic Mechanical Thermal Analysis. The experimental results show that GPTA films have a module of conservation higher than that of TPGDA films for the two types of irradiation. Density of these films with various thicknesses is given with and without liquid crystal for to see the effect of this last on the properties of the TPGDA/E7 and GPTA/E7 systems. The presence of microdroplets of liquid crystal E7 in the matrix TPGDA or GPTA affect the density of systems studied who is weaker for the films with matrix TPGDA; this can be connected with the nature of the monomers GPTA three-functionals, what carries with films more dense.

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聚合诱导相分离制备的聚合物/液晶共混物的动力学行为和密度

在这项工作中，我们对PDLCs薄膜(聚合物分散液晶)的动态行为和密度感兴趣。由向列液晶E7组成的微液滴分散在两种聚合物基体中;三丙二醇二丙烯酸酯(TPGDA)或丙二烯-甘油三丙烯酸酯(GPTA)。这些薄膜是通过电子束(EB)或紫外线(UV)辐射聚合诱导相分离制备的。得到的薄膜用动态机械热分析来表征。实验结果表明，两种辐照方式下，GPTA膜的守恒模量均高于TPGDA膜。给出了不同厚度薄膜在有液晶和没有液晶的情况下的密度，以观察液晶对TPGDA/E7和GPTA/E7体系性能的影响。液晶微滴E7在TPGDA或GPTA基体中的存在对体系密度的影响较小;这可能与GPTA三官能团的性质有关，它使薄膜更致密。

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2014 North African Workshop on Dielectic Materials for Photovoltaic Systems (NAWDMPV)

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