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The effect of sodium stearate‐modified hydrocalumite on the thermal stability of poly(vinyl chloride)
Author(s) -
Yang Huan,
Yang Zhanhong
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45758
Subject(s) - stearate , thermal stability , sodium , vinyl chloride , polymer chemistry , chemical engineering , chemistry , materials science , composite material , polymer , copolymer , organic chemistry , engineering
Hydrocalumite as a new‐type of thermal stabilizer used in poly(vinyl chloride) resin had been well prepared by using precipitation transformation method. The as‐prepared hydrocalumite was then modified by sodium stearate in different condition including temperature, stirring time, and the amount of sodium stearate. Scanning electron microscopy tests demonstrate that hydrocalumite had been well modified. Illustrated by activation grade, the static oven heat aging experiments and the rate of thermal weight loss, it turns out that the best modification condition is when the addition of sodium stearate is 6% of hydrocalumite (wt), the reacting temperature is 90 °C, and the stirring time is 100 min. Static thermal aging test shows that the aging time got improved at least 30 min under the high temperature of 190 °C, and the time when Congo red test paper began to turn blue for modified hydrocalumite is 20 min longer than that of unmodified hydrocalumite. All results turn out to be that the hydrocalumite modified by sodium stearate in such condition had good compatibility with poly(vinyl chloride) and presented better thermal stability. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45758.