Morphology and Thermal Stability of Novolac Phenolic Resin/Clay Nanocomposites Prepared via Solution High-Shear Mixing

✍ Scribed by Zhihao Zhang; Guozhong Ye; Hossein Toghiani; Charles U. Pittman Jr

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 646 KB
• Volume: 295
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.201000153

✦ Synopsis

Abstract

Phenolic resin/clay composites were prepared by high‐shear mixing of clay suspended in CH~3~OH solutions of Novolac resin and curing agent. Pure clay Cloisite Na^+^ and pillared clays Cloisite 10A, 30B, and Na^+^Cloisite that was pillared by 3‐hexadecyl‐1‐methylimidazolium bromide were studied. After CH~3~OH evaporation, Novolac was cured at low temperatures. XRD showed that clay gallery d‐spacings decreased upon solvent evaporation and partial curing. Slight d‐spacing increases were sometimes observed from a partially cured stage to a further cured composite. Na^+^Cloisite gave the highest nanodispersion, Cloisites 10A and 30B the lowest. TGA revealed that Na^+^ clay or organoclay incorporation in partially cured and cured composites did not improve the thermal stability of Novolac.

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