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283 results on '"Marigo, Antonio"'

12. Structure, morphology, and biodegradability of poly(e-caprolactone)-based nanocomposites

Author

Neppalli, Ramesh, Causin, Valerio, Marega, Carla, Saini, Roberta, Mba, Miriam, and Marigo, Antonio

Subjects
Nanotechnology -- Research, Biodegradation -- Research, Polymeric composites -- Mechanical properties -- Chemical properties -- Structure -- Technology application -- Composition, Technology application, Engineering and manufacturing industries, Science and technology
Abstract

Biodegradable polycaprolactone/organoclay nanocomposites were prepared by solvent casting, using different amounts of filler and matrices differing by average molecular weight. Intercalated nanocomposites were obtained. The nanocomposites were characterized by wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) methods. Negligible variations in the degree of crystallinity were detected by WAXD. The thickness of crystalline lamellae, measured by SAXS, increased in low molecular weight polymer nanocomposites with increasing clay amount; this effect was weakened in matrices with high molecular weight. Differential scanning calorimetry showed an inhibiting effect of clay on crystallization. The composites' ductility was largely increased, whereas stiffness was retained. After biodegradation in compost, in all samples, the degree of crystallinity was increased, meaning that the less ordered portion of the sample was preferentially degraded. Clay slowed down the biodegradation rate, coherently with the observed increase in the lamellar thickness due to the filler. This may offer a strategy for tuning the biodegradability by calibrating their semicrystalline framework. POLYM. ENG. SCI., 51:1489-1496, 2011. © 2011 Society of Plastics Engineers, INTRODUCTION Polymer-based nanocomposites have attracted the interest of industrial and academic researchers because they offer a valuable alternative to traditional composites or blends. Reinforcing the matrix with nanometer-sized particles, instead [...]

Published
2011
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25. Bayesian framework for the evaluation of fiber evidence in a double murder - a case report.

Author

Causin, Valerio, Schiavone, Sergio, Marigo, Antonio, and Carresi, Pietro

Subjects
Bayesian statistical decision theory -- Research -- Analysis, Fibers -- Analysis -- Research, Murder -- Evidence -- Analysis -- Research, Forensic sciences -- Research -- Analysis
Abstract

Abstract Fiber evidence found on a suspect vehicle was the only useful trace to reconstruct the dynamics of the transportation of two corpses. Optical microscopy, UV-Vis microspectrophotometry and infrared analysis [...]

Published
2004

30. Materials based on Poly(oxazoline) and Poly(3-hexylthiophene) for biomedical applications: preliminary results

Author

Causin, Valerio, Benetti, Edmondo Maria, Agresta, Elisa, Da Pian, Marta, Menegazzi, Stefania, Maggini, Michele, Marigo, Antonio, Institute for Material Research, Causin, Valerio, Benetti, Edmondo Maria, Agresta, Elisa, Da Pian, Marta, Menegazzi, Stefania, Maggini, Michele, and Marigo, Antonio

Subjects
biomedical applications, Poly(oxazoline), Poly(3-hexylthiophene), Poly(oxazoline), Poly(3-hexylthiophene), biomedical applications
Published
2013

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