Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion
Authorized Users Only
2014
Authors
Soares, Alexandre RobertoPontón, Patricia I.

Mančić, Lidija

D'Almeida, Jose Roberto

Romao, Carl P.
White, Mary Ann
Marinković, Bojan
Article (Published version)
Metadata
Show full item recordAbstract
Recently, polymer composites reinforced with low fractions of thermomiotic nanoceramics have triggered a lot of research. The efforts have been focused on achieving considerable reduction of the coefficient of thermal expansion (CTE) of polymeric materials without deterioration of other physical properties. In this context, polyethylene (PE) composites reinforced with different loads of Al2Mo3O12 nanofillers (0.5–4 mass %) were fabricated by micro-compounding. To enhance the interfacial interaction between the two components, chemical functionalization of Al2Mo3O12 was performed with vinyltrimethoxysilane (VTMS) prior to micro-compounding. Infrared spectroscopy and thermogravimetry demonstrated the successful grafting of VTMS on the Al2Mo3O12 surface. The composites showed strongly decreased CTEs, up to 46 % reduction for loadings of 4 mass % compared with neat PE, suggesting intimate filler–matrix interactions. The variation of CTEs of the composites in terms of the filler fraction wa...s successfully described by Turner’s model allowing calculation of the bulk modulus of monoclinic Al2Mo3O12 (13.6 ± 2.6 GPa), in agreement with the value obtained by an ultrasonic method. The thermal stability of the composites was improved, although the addition of functionalized fillers decreased the degree of crystallinity of the PE to a small extent. The Young’s modulus and yield strength of the composites increased from 6.6 to 19.1 % and 4.0–6.0 %, respectively, supporting the existence of strong filler–matrix interactions, contributing to an efficient load transfer. Finite element analysis of thermal stresses indicated absence of plastic deformation of the matrix or fracture of the nanofillers, for a 100 K temperature drop.
Keywords:
Al2Mo3O12 / polyethylene / polymer composites / thermomiotic nanoceramicsSource:
Journal of Materials Science, 2014, 49, 22, 7870-7882Publisher:
- Springer
Funding / projects:
- CNPq (National Council for Scientific and Technological Development), Research Productivity Grants
- NSERC - Discovery Grants program
DOI: 10.1007/s10853-014-8498-3
ISSN: 0022-2461 (Print); 1573-4803 (Online)
WoS: 000341419900026
Scopus: 2-s2.0-84906950830
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Soares, Alexandre Roberto AU - Pontón, Patricia I. AU - Mančić, Lidija AU - D'Almeida, Jose Roberto AU - Romao, Carl P. AU - White, Mary Ann AU - Marinković, Bojan PY - 2014 UR - https://dais.sanu.ac.rs/123456789/664 AB - Recently, polymer composites reinforced with low fractions of thermomiotic nanoceramics have triggered a lot of research. The efforts have been focused on achieving considerable reduction of the coefficient of thermal expansion (CTE) of polymeric materials without deterioration of other physical properties. In this context, polyethylene (PE) composites reinforced with different loads of Al2Mo3O12 nanofillers (0.5–4 mass %) were fabricated by micro-compounding. To enhance the interfacial interaction between the two components, chemical functionalization of Al2Mo3O12 was performed with vinyltrimethoxysilane (VTMS) prior to micro-compounding. Infrared spectroscopy and thermogravimetry demonstrated the successful grafting of VTMS on the Al2Mo3O12 surface. The composites showed strongly decreased CTEs, up to 46 % reduction for loadings of 4 mass % compared with neat PE, suggesting intimate filler–matrix interactions. The variation of CTEs of the composites in terms of the filler fraction was successfully described by Turner’s model allowing calculation of the bulk modulus of monoclinic Al2Mo3O12 (13.6 ± 2.6 GPa), in agreement with the value obtained by an ultrasonic method. The thermal stability of the composites was improved, although the addition of functionalized fillers decreased the degree of crystallinity of the PE to a small extent. The Young’s modulus and yield strength of the composites increased from 6.6 to 19.1 % and 4.0–6.0 %, respectively, supporting the existence of strong filler–matrix interactions, contributing to an efficient load transfer. Finite element analysis of thermal stresses indicated absence of plastic deformation of the matrix or fracture of the nanofillers, for a 100 K temperature drop. PB - Springer T2 - Journal of Materials Science T1 - Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion SP - 7870 EP - 7882 VL - 49 IS - 22 DO - 10.1007/s10853-014-8498-3 UR - https://hdl.handle.net/21.15107/rcub_dais_664 ER -
@article{ author = "Soares, Alexandre Roberto and Pontón, Patricia I. and Mančić, Lidija and D'Almeida, Jose Roberto and Romao, Carl P. and White, Mary Ann and Marinković, Bojan", year = "2014", abstract = "Recently, polymer composites reinforced with low fractions of thermomiotic nanoceramics have triggered a lot of research. The efforts have been focused on achieving considerable reduction of the coefficient of thermal expansion (CTE) of polymeric materials without deterioration of other physical properties. In this context, polyethylene (PE) composites reinforced with different loads of Al2Mo3O12 nanofillers (0.5–4 mass %) were fabricated by micro-compounding. To enhance the interfacial interaction between the two components, chemical functionalization of Al2Mo3O12 was performed with vinyltrimethoxysilane (VTMS) prior to micro-compounding. Infrared spectroscopy and thermogravimetry demonstrated the successful grafting of VTMS on the Al2Mo3O12 surface. The composites showed strongly decreased CTEs, up to 46 % reduction for loadings of 4 mass % compared with neat PE, suggesting intimate filler–matrix interactions. The variation of CTEs of the composites in terms of the filler fraction was successfully described by Turner’s model allowing calculation of the bulk modulus of monoclinic Al2Mo3O12 (13.6 ± 2.6 GPa), in agreement with the value obtained by an ultrasonic method. The thermal stability of the composites was improved, although the addition of functionalized fillers decreased the degree of crystallinity of the PE to a small extent. The Young’s modulus and yield strength of the composites increased from 6.6 to 19.1 % and 4.0–6.0 %, respectively, supporting the existence of strong filler–matrix interactions, contributing to an efficient load transfer. Finite element analysis of thermal stresses indicated absence of plastic deformation of the matrix or fracture of the nanofillers, for a 100 K temperature drop.", publisher = "Springer", journal = "Journal of Materials Science", title = "Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion", pages = "7870-7882", volume = "49", number = "22", doi = "10.1007/s10853-014-8498-3", url = "https://hdl.handle.net/21.15107/rcub_dais_664" }
Soares, A. R., Pontón, P. I., Mančić, L., D'Almeida, J. R., Romao, C. P., White, M. A.,& Marinković, B.. (2014). Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion. in Journal of Materials Science Springer., 49(22), 7870-7882. https://doi.org/10.1007/s10853-014-8498-3 https://hdl.handle.net/21.15107/rcub_dais_664
Soares AR, Pontón PI, Mančić L, D'Almeida JR, Romao CP, White MA, Marinković B. Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion. in Journal of Materials Science. 2014;49(22):7870-7882. doi:10.1007/s10853-014-8498-3 https://hdl.handle.net/21.15107/rcub_dais_664 .
Soares, Alexandre Roberto, Pontón, Patricia I., Mančić, Lidija, D'Almeida, Jose Roberto, Romao, Carl P., White, Mary Ann, Marinković, Bojan, "Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion" in Journal of Materials Science, 49, no. 22 (2014):7870-7882, https://doi.org/10.1007/s10853-014-8498-3 ., https://hdl.handle.net/21.15107/rcub_dais_664 .