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| 空间位阻对淀粉偶氮染料共聚物的光致变色行为研究 | |
| 引用本文： | 李兴东,薛华丽. 空间位阻对淀粉偶氮染料共聚物的光致变色行为研究[J]. 兰州交通大学学报, 2009, 28(3): 170-173 |
| 作者姓名： | 李兴东 薛华丽 |
| 作者单位： | 李兴东,LI Xing-dong(兰州交通大学,数理学院,甘肃,兰州,730070);薛华丽,XUE Hua-li(甘肃农业大学,理学院,甘肃,兰州,730070) |
| 摘 要： | 以偶氮染料的乙烯基单体与可溶性淀粉的接枝共聚物为原料,利用动力学分析方法研究其共聚物及其对应的单体在溶液中的光致变色行为.结果表明,由于淀粉骨架的影响,共聚物较单体具有较好的光致变色性;另外,由于空间位阻的影响,对于邻位被丙烯酰氧基取代的聚合物来说,在一定波长的光照射下,发生了光致变色性的禁阻,而对于对位被取代的聚合物,在一定波长的光照射下,由于空间位阻较小,为光致变色性允许,可见,空间位阻是影响光致变色性能的一个非常重要的因素. |
| 关 键 词： | 接枝共聚物 吸收波长 空间位阻 光致变色 |
Effect of Spatial Hindrance on Photochromic Behavior of Copolymer Starch and Azo-Dyes |
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| LI Xing-dong,XUE Hua-li. Effect of Spatial Hindrance on Photochromic Behavior of Copolymer Starch and Azo-Dyes[J]. Journal of Lanzhou Jiaotong University, 2009, 28(3): 170-173 | |
| Authors: | LI Xing-dong XUE Hua-li |
| Affiliation: | LI Xing-dong, XUE Hua-li(1. School of Mathematics,Physics and Software Engineering, Lanzhou Jiaotong University, Lanzhou 730070,China; 2. College of Science,Gansu Agricultural University, Lanzhou 730070,China) |
| Abstract: | The photoisomerization of eopolymers of vinyl monomer and soluble starch and their corresponding monomers were investigated in liquids by dynamical analysis. The experimental results showed that the backbone of starch in the main chain had a marked influence on photoisomerization. The graft copolymers showed better photoisomerization than their corresponding monomers. In addition,the effect of spatial hin- drance was investigated. The results showed that the copolymers of para-acrolyloxy substitution exhibited good photoisomerization while ortho-acroloyloxy substitution appeared to take place photochromic hindrance. It suggested that spatial hindrance was an important factor to influence remarkably photoisomerization. |
| Keywords: | graft copolymer absorption spectra spatial hindrance photochromism |
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