Fluorescence anisotropy sensor and its application to polymer processing and characterization

被引：27

作者：

Bur, AJ ^{[1
]}

Roth, SC ^{[1
]}

Thomas, CL ^{[1
]}

机构：

[1] NIST, Div Polymers, Gaithersburg, MD 20899 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2000年 / 71卷 / 03期

关键词：

D O I：

10.1063/1.1150499

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An optical sensor containing polarizing optical components has been constructed to monitor fluorescence anisotropy during polymer processing and to carry out remote sensing of polymer products doped with fluorescent dyes. The sensor is a compact unit that is used to polarize incident excitation light as well as to analyze the polarization of generated fluorescent light. Optical fibers are used to carry light between the sensor head and the light source and detecting equipment. The anisotropy measurement yields information about the orientation of a fluorescent dye molecule that has been doped into polymer matrix. Fluorescent dyes that have geometrical asymmetry in their molecular structure are used. Experiments are described for which the sensor is positioned in line during extrusion, during specimen extension, and where the sensor is used to carry out area scans of films and sheets. Measurements were made on polyethylene, polyethylene terephthalate, and polybutadiene resins that contained a low concentration of fluorescent dye. [S0034-6748(00)04103-4].

引用

页码：1516 / 1523

页数：8

共 44 条

[1] Local motion of crosslinks for poly(methyl methacrylate) gels by the fluorescence depolarization method [J].