Orientation of pores in microporous polyethylene films as determined by polarized absorption spectroscopy

被引:11
作者
Grabchev, I
Moneva, I [1 ]
Kozlov, A
Elyashevich, G
机构
[1] Bulgarian Acad Sci, Inst Polymers, BU-1113 Sofia, Bulgaria
[2] Russian Acad Sci, Inst Highmol Cpds, St Petersburg 199004, Russia
关键词
polyethylene membranes; fluorescent dyes; orientation order; liquid crystals; polarized-light absorption spectroscopy;
D O I
10.1007/s100190000113
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Microporous polyethylene films with good mechanical properties can be produced on the basis of hard-elastic specimens by uniaxial deformation. The so called "guest-host" effect [1, 2] was explored to determine the order parameter of pores in a series of PE membranes so produced by polarized absorption spectroscopy using dichroic dyes dissolved in the nematic liquid crystal ZLI 1840 (LC) as indicator. The parameter of the orientation order S-A of the pores along the draw direction was found to increase with increasing spin draw. A qualitative comparison of S-A with the thermodynamic behavior of the dye + LC systems confined in the pores was made. The results obtained are related to the mechanism of porous structure formation.
引用
收藏
页码:301 / 305
页数:5
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