A METHOD FOR DETERMINING MARK-HOUWINK CONSTANTS K AND α OF FLUOROPOLYMERS (F_(2314))

摘要

In order to obtain the Mark-Houwink constants k and α by Mark-Houwink equation, stoichiometry and the method of least squares, a series of broad-molecular-weight-distribution fluoropolymer samples (F_(2314)) are tested at 25°C in tetrahydrofuran (THF). According to these data including k = 1. 03 X 10~(-3) and α = 0.60, the relative deviation is 2.4% , and the most deviation is 4.1% . Reasons of some abnormal deviation are analyzed.