Property Relationship in Organosilanes and Nanotubes Filled Polypropylene Hybrid Composites

Materials. 2014;7(10):7073-7092 DOI 10.3390/ma7107073

 

Journal Homepage

Journal Title: Materials

ISSN: 1996-1944 (Print)

Publisher: MDPI AG

LCC Subject Category: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials | Technology: Engineering (General). Civil engineering (General) | Science: Natural history (General): Microscopy | Science: Physics: Descriptive and experimental mechanics

Country of publisher: Switzerland

Language of fulltext: English

Full-text formats available: PDF, HTML

 

AUTHORS

Alejandra J. Monsiváis-Barrón (Tecnológico de Monterrey Av. Eugenio Garza Sada Sur 2501, Tecnológico, 64849 Monterrey, Nuevo León, Mexico)
Jaime Bonilla-Rios (Tecnológico de Monterrey Av. Eugenio Garza Sada Sur 2501, Tecnológico, 64849 Monterrey, Nuevo León, Mexico)
Antonio Sánchez-Fernández (Tecnológico de Monterrey Av. Eugenio Garza Sada Sur 2501, Tecnológico, 64849 Monterrey, Nuevo León, Mexico)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 11 weeks

 

Abstract | Full Text

Polypropylene composites with different filler contents were prepared by creating a masterbatch containing 3 wt%. filler. A variety of silanol groups were used to synthetized three compounds in different media trough a sol-gel process with acetic acid, formic acid and ammonium hydroxide as catalysts. Besides, four different nanotubular fillers were also used to analyze their behavior and compare it with the effect caused by the silanol groups. These tubular structures comprise: unmodified halloysite, carbon nanotubes and functionalized halloysite and carbon nanotubes. Morphological characterization in SEM and STEM/TEM showed dispersion in the polypropylene matrix. According to TGA and DSC measurements thermal behavior remain similar for all the composites. Mechanical test in tension demonstrate that modulus of the composites increases for all samples with a major impact for materials containing silanol groups synthetized in formic acid. Rheological measurements show a significantly increment in viscosity for samples containing unmodified and modified carbon nanotubes. No difference was found for samples containing silanol groups and halloysite when compared to neat polypropylene. Finally, the oxygen transmission rate increased for all samples showing high barrier properties only for samples containing natural and functionalized halloysite nanotubes.