Functions and Mechanical Properties of Novel Ionic Elastomers

合成了两种紫罗烯型弹性体PTI和PTV，研究了它们的力学性能和一些特殊功能。PTI是脂肪族铵盐，而PTV含有紫精单元。在PTI的合成过程中，会发生孟舒特金反应，该反应对PTI的物理性能有一定的影响。因此，进行了反应的动力学研究，结果被收录在一篇将发表在Makromolekulare Chemie上的论文中。发现PTI粘附于人皮肤。据此评价了PTI的粘附性能，发现PTI中离子位点越多，粘附性能越优异。这一结果发表在《日本化学会公报》上。PTV中的紫精单位是PTV光响应性的原因。观察到光致变色和光机械性能，并认识到抗衡阴离子的作用，即，氯离子PTV比溴离子PTV敏感。氯化物PTV在不加任何添加剂的情况下表现出光致变色性，这可能是由于它们之间的亲核性差异。PTV膜的应力松弛明显表现出光机械效应。这种效应已经在一个简短的交流中发表，并向《聚合物科学杂志：A部分》提交了一篇完整的论文。PTV对电场敏感。外加电场使PTV薄膜的颜色由无色变为蓝色，再加上PTI和PTV薄膜优异的拉伸性能、粘接性能、光致变色性能、光机械性能和电致变色性能，表明PTI和PTV在电子学和光子学等领域具有广阔的应用前景。

Two kinds of ionene-type elastomers, PTI and PTV, were prepared and their mechanical properties and a few special functions were investigated. PTI is an aliphatic ammonium salt, while PTV contains viologen units. In the synthesis of PTI, the Menschutkin reaction was carried out, and the reaction was influential to the physical properties of PTI. Therefore the kinetic study of the reaction was carried out, and the results were included in a paper which will be published in Makromolekulare Chemie. PTI was found to adhere to the human skin. Accordingly the adhesion property of PTI was evaluated, and found that the more is the ionic sites in PTI, the more excellent is the adhesion property. This result is reported in a paper submitted to Bulletin of the Chemical Society of Japan.The viologen units in PTV are responsible for the photoresponsiveness of PTV. Both photochromic and photomechanical properties were observed, and the effect of counter anions was recognized, i.e., PTV with chloride was more sensitive than that with bromide. PTV with chloride was photochromic without any additives, which might be due to the nucleophilicity difference between them. Stress relaxation of PTV film clearly displayed a photomechanical effect. This effect was already published in a short communication, and a full paper was submitted to Journal of Polymer Science: Part A. PTV was also sensitive to electric field. The application of electric field caused a color change of PTV film from colorless to blue.Together with an excellent tensile properties of PTI and PTV films, the observed adhesive, photochromic, photomechanical and electrochromic properties demonstrate that both PTI and PTV are promising materials for the future utilizations in various areas including electronics and photonics.