Publication: High thermal and mechanical properties enhancement obtained in highly filled polybenzoxazine nanocomposites with fumed silica
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Issued Date
2014
Resource Type
File Type
application/pdf
ISSN
13598368
Other identifier(s)
2-s2.0-84884128066
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
Composites Part B: Engineering. Vol 56, No. (2014), p.197-206
Suggested Citation
Dueramae I., Jubsilp C., Takeichi T., Rimdusit S. High thermal and mechanical properties enhancement obtained in highly filled polybenzoxazine nanocomposites with fumed silica. Composites Part B: Engineering. Vol 56, No. (2014), p.197-206. doi:10.1016/j.compositesb.2013.08.027 Retrieved from: https://hdl.handle.net/20.500.14740/6271
Author(s)
Abstract
Highly filled polybenzoxazine nanocomposites filled with nano-SiO 2 particles were investigated for their mechanical and thermal properties as a function of filler loading. The nanocomposites were prepared by high shear mixing followed by compression molding. A very low A-stage viscosity of benzoxazine monomer gives it excellent processability having maximum nano-SiO2 loading as high as 30 wt% (18.8 vol%) with negligible void content. Moreover, thermal analysis of the curing process of the compound of the PBA-a/nano-SiO2 composites was found to be autocatalytic in nature with average activation energy of 79-92 kJ mol-1. Microscopic analysis (SEM) performed on the PBA-a/nano-SiO2 composite fracture surface indicated a nearly homogeneous distribution of the nano-scaled silica in the polybenzoxazine matrix. In addition, the enhancement in storage modulus of the nano-SiO2 filled polybenzoxazine composites was found to be significantly higher than that of the recently reported nano-SiO2 filled epoxy composites. The dependence of the nanocomposites' modulus on the nano-SiO2 particles content is well fitted by the generalized Kerner equation. Furthermore, the relatively high micro-hardness of the PBA-a/nano-SiO2 composites up to about 600 MPa was achieved. Finally, the substantial enhancement in the glass transition temperature (Tg) of the PBA-a/nano-SiO2 composites was also observed with the ΔTg up to 16 C at the nano-SiO2 loading of 30 wt%. The resulting PBA-a/nano-SiO2 composite is a highly attractive candidate as coating material in electronic packaging or other related applications. © 2013 Elsevier Ltd. All rights reserved.
Subject(s)
Benzoxazine monomers
Composite fracture surfaces
Homogeneous distribution
Mechanical and thermal properties
Microscopic analysis
Particle reinforcement
Polymer Matrix Composites (PMCs)
Thermo-mechanical
Activation energy
Electronics packaging
Mechanical properties
Nanocomposites
Silica
Thermoanalysis
Filled polymers
Composite fracture surfaces
Homogeneous distribution
Mechanical and thermal properties
Microscopic analysis
Particle reinforcement
Polymer Matrix Composites (PMCs)
Thermo-mechanical
Activation energy
Electronics packaging
Mechanical properties
Nanocomposites
Silica
Thermoanalysis
Filled polymers