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Effect of preparation methods on thermal properties of poly(acrylic acid)/silica composites
Author(s) -
Çaykara Tuncer,
Güven Olgun
Publication year - 1998
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/(sici)1097-4628(19981031)70:5<891::aid-app8>3.0.co;2-o
Subject(s) - thermogravimetry , activation energy , materials science , polymerization , acrylic acid , composite material , polymer chemistry , glass transition , acrylic resin , thermal stability , degradation (telecommunications) , kinetics , chemical engineering , chemistry , copolymer , polymer , organic chemistry , coating , telecommunications , physics , quantum mechanics , computer science , engineering
Poly(acrylic acid)‐silica composites have been prepared by two different methods and thermally characterized. The glass transition temperature (T g ) of the PAA‐SiO 2 system prepared by mixture method was found to be 120°C irrespective of the type and amounts of silica involved in this work. However, the T g varied between 132°C and 113°C in the systems prepared by polymerization reaction depending upon the type of silica and percentage conversion. The composites prepared by mixture and polymerization method have been investigated by using thermogravimetry (TGA) to follow the kinetics of anhydride formation and thermal degradation reactions. The activation energy of thermal anhydride formation and thermal degradation reaction was not found to change very much with ratio of PAA‐SiO 2 when the composites were prepared by simple mixing. For the composites prepared by polymerization method the activation energy of anhydride formation and thermal degradation reaction were observed to change with percentage conversion. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 70: 891–895, 1998