Polymer/silicate Interaction in Nylon 6-Clay Hybrid Studied by Temperature Programmed Pyrolysis Techniques

Autor:	Hiroaki Sato, Ryo Harada, Makoto Kato, Arimitsu Usuki, Shin Tsuge, Hajime Ohtani
Rok vydání:	2006
Předmět:	chemistry.chemical_classification Nanocomposite Polymers and Plastics Nitrile Polymer Silicate chemistry.chemical_compound Nylon 6 Montmorillonite chemistry Chemical engineering Polymer chemistry Monolayer Materials Chemistry Pyrolysis
Zdroj:	Polymer Journal. 38:171-177
ISSN:	1349-0540 0032-3896
DOI:	10.1295/polymj.38.171
Popis:	Nylon 6-clay hybrid (NCH) was characterized by temperature-programmed pyrolysis (TPPy) techniques such as TPPy-mass spectrometry and TPPy-gas chromatography mainly focusing on the interaction between nylon 6 molecule and the surface of silicate monolayers in the NCH samples, which leads to the superior properties of the hybrid nanomateirals. Pyrolysis profile of nylon 6 matrix in the NCH samples was gradually shifted to lower temperature region with increase in the clay content. The yields of main pyrolysis products such as e-caprolactam from the NCH samples decreased with increase in the clay content, whereas those of the nitrile compounds significantly increased. These results suggested that the clay surface accelerate cis-elimination reaction of nylon 6 matrix in the NCH samples to form the nitrile compounds rather than intramolecular amide exchange to e-caprolactam. Based on the changes in pyrolysis behaviors of nylon 6 matrix in the NCH samples, the interaction between positively charged NH proton of nylon 6 molecules and negatively charged clay surface was proposed which would stabilize the six-membered transition state during pyrolysis.
Databáze:	OpenAIRE
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