LI Chang-jiang, CEN An-bang. A SIMPLE OPTICAL INTERFERENCE METHOD FOR T_g,REFRACTIVE INDEX AND THERMAL EXPANSION DETERMINATION[J]. Acta Polymerica Sinica, 1985,(3):212-215.
LI Chang-jiang, CEN An-bang. A SIMPLE OPTICAL INTERFERENCE METHOD FOR T_g,REFRACTIVE INDEX AND THERMAL EXPANSION DETERMINATION[J]. Acta Polymerica Sinica, 1985,(3):212-215.DOI:
This paper repored a method to measure refractive index of transparant polymer films using Kayleigh interferometer. In the range of-60-120℃
plots of the optical path of light transmission in the polymer vs various temperatures were obtained
and from the same curves Tg
thermal expansion coefficient and temperature coefficient of refractive index of polymer films were estimated. It is shown that optical interference method is a simple and sensitive method.