Thermal stability and deformation of poly(acrylic acid)–metal oxides

✍ Scribed by Ho-Shing Wu; Heay-Chain Jone; Shang-Shin Meng

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 183 KB
• Volume: 66
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19971205)66:10<2021::aid-app19>3.0.co;2-6

✦ Synopsis

In this work, we investigated the thermal stability and deformation of the compound of poly(acrylic acid) (PAA) and metal oxides (ZnO, CaO, CuO, Al 2 O 3 , and Cr 2 O 3 ). The kinetic parameters of the desorption of water from PAA-metal oxide were calculated. The activation energies of the water desorption of PAA-metal oxide were less than 5 kcal/mol. The order of bonding capability of oxygen (PAA-O-metal) and water was PAA-CaO ú PAA-ZnO ú PAA-CuO ú PAA-Cr 2 O 3 ú PAA-Al 2 O 3 . The reaction types of the composites were clarified. Incorporating metal oxide into PAA increased the thermal stability. The factors which influence the mechanical properties of the composites, e.g., the chemical compositions, curing environment, and curing time, were also studied. The various curing environments (pure water, 0.1N HCl, 0.1N NaOH, and methanol) decreased the compressive strength of PAA-metal oxide. Moreover, the thermal stability and compressive strength of PAA-ZnO and PAA-CuO reached an optimum because of their crosslinking nature.