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Thermal and DMA Characterization of PTFE‐PMMA Nanocomposites from Core‐Shell Nanoparticles
Author(s) -
Antonioli Diego,
Laus Michele,
Sparnacci Katia,
Deregibus Simone,
Kapeliouchko Valerj,
Palamone Giovanna,
Poggio Tiziana,
Zuccheri Giampaolo,
Passeri Rosita
Publication year - 2010
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201051029
Subject(s) - materials science , nanocomposite , thermal stability , composite material , nanoparticle , thermal , polytetrafluoroethylene , characterization (materials science) , shell (structure) , core (optical fiber) , degradation (telecommunications) , chemical engineering , nanotechnology , physics , meteorology , engineering , telecommunications , computer science
Abstract The thermal and dynamic‐mechanical characteristics of three PTFE/PMMA nanoparticle samples are described. The shell forming PMMA, once isolated from the PTFE cores, exhibits a lower thermal stability than the PMMA component in the corresponding nanocomposite under both thermal and oxidative degradation conditions thus indicating a definite, though moderate, thermal reinforcement due to the morphology of the nanocomposites. An increase in the thermal stability under nitrogen atmosphere was observed as the PTFE amount increases. However under air, no difference is observed in the various systems. These observations suggest that only a physical shield can be exerted by the PTFE cores to the PMMA matrix possibly due to a weak interface between PTFE and the PMMA. This hypothesis is also substantiated by the DMA analysis.