Determination of the coefficient of thermal expansion of epoxy composites

Glavchev, I.; Petrova, Krasimira T.; Ivanova, M.

doi:10.1016/s0142-9418(01)00066-6

Cited by 14 publications

(6 citation statements)

References 6 publications

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“…Consequently, more fluctuations in the molecular structure were generated, and the rate of expansion increased upon heating. However, as previously reported [12][13][14], increasing the filler content decreases the free volume content. Hence, the The left micrographs (a, c, e, g) are taken at 9500 magnification, and the right micrographs (b, d, f, h) are taken at 92,000 magnification space for expansion of the polymer decreases, and the CTEs of the composites are further decreased.…”

Section: Coefficient Of Thermal Expansion (Cte)supporting

confidence: 74%

Fabrication and characterization of nano filler-filled epoxy composites for underfill application

Firdaus

Mariatti

2011

J Mater Sci: Mater Electron

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The present research aims to fabricate and characterize different nano filler types and filler loadings in epoxy composites for underfill application. The nano filler types were synthetic diamond (SD), boron nitride (BN), and silica (S). The filler loadings which were considered in the study were varied from 1 to 4 vol%. Sonication process was used to facilitate filler dispersion. The results showed that BN had a good flow ability, with higher flow rates than the other filler types. The thermal conductivity of the composites increased with the addition of fillers, and higher thermal conductivity value is observed in SD system. The coefficient of thermal expansion (CTE) of composites decreased with the addition of filler with lower CTE value shown by BN system. Generally, SD showed higher flexural strength and flexural modulus compared with BN and S. A high filler loading also resulted in decreased flexural strength but increased flexural modulus.

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Section: Coefficient Of Thermal Expansion (Cte)supporting

confidence: 74%

Fabrication and characterization of nano filler-filled epoxy composites for underfill application

Firdaus

Mariatti

2011

J Mater Sci: Mater Electron

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“…The CTE determined after the T g region compares well with those obtained before, though the percentage changes which ranged from 12 to 20% were slightly higher than those determined before the T g for the various respective specimens. The CTEs of conventional epoxy filled with 50 wt % of seven different inorganic compounds and cured with two different hardeners showed reduction ranging from 6.98 to 37.98% in CTEs . This suggests that our finding is significant, with just 1–4 wt % of CaSiO 3 giving maximum improvements of 19 and 20% before and after T g , respectively.…”

Section: Resultsmentioning

confidence: 50%

Effect of reinforcement of sustainable β‐CaSiO₃ nanoparticles in bio‐based epoxy resin system

Tiimob

Rangari

Jeelani

2014

J of Applied Polymer Sci

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The b-CaSiO 3 nanoparticles (NPs) were prepared using calcium carbonate from egg shells and silica as precursors. These NPs were incorporated (1-4 wt %) into bio-based epoxy resin to fabricate nanocomposites. Thermal and mechanical tests were carried out on these composites. The results of dynamic mechanical analysis showed significant improvement in the storage modulus of 1 and 2 wt % composites. The thermomechanical analysis data revealed 19 and 20% of reduction in coefficient of thermal expansion for 1 wt % of CaSiO 3 before and after glass transition as compared to the neat epoxy system. Thermogravimetric analysis results also showed delayed thermal degradation of the composites by significant amounts (17-35 C) for 5% of decomposition, a proportional increase in residues corresponding to the loading concentrations. The flexure tests showed significant improvements in strength (17-36%), modulus (5-33%), and toughness for 1-4 wt % of reinforcement of b-CaSiO 3 NPs. Theoretical calculations of the reinforcement effect on the flexure modulus of the composites agree well with the experimental values. The scanning electron micrograph of the fractured surfaces revealed better interfacial interactions in the composites and enhancements in crack path deflections over the neat specimen.

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“…Most of the research performed in this area could be classified on thermal expanding studies of compounds [ 8 , 9 , 10 , 11 ] and composites such as GRPs and hybrid [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ] materials.…”

Section: Introductionmentioning

confidence: 99%

Non-Linearity of Thermosetting Polymers’ and GRPs’ Thermal Expanding: Experimental Study and Modeling

2022

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Thermal expanding is the important property that defines the stress–strain condition of GRP structures exploited under heating and having limited thermal resistance. So, the GRPs’ thermal expanding prediction is the actual requirement of such structures design. The experimental accurate dilatometric study resulted in the non-linearity of thermosetting polymers and plastics thermal expanding under heating. The polymers and plastics thermal expanding coefficient (CTE) is non-linearly increasing under heating before glassing temperature (Tg). Using the previous polymers and GRPs modelling experience and experimental dilatometric results, the non-linear adequate prediction models of their CTE were proposed and proved. The new compensative wave model of polymers’ CTE and multi-layer model of GRPs’ CTE were proposed and successfully tested. A prediction of the temperature dependences of the thermal expansion coefficients of various thermoset polymer binders and data on the reinforcement structure was performed based on the experimentally obtained temperature dependences of the CTEs of GRPs. The prediction was performed using the finite-element homogenization method in the Material Designer module of the academic version of the Ansys package. A satisfactory concurrence of the numerical results of the prognosis and the experiment for all considered cases is observed in the temperature range from 50 to 100 °C, after glass transition temperature best coincidence of numerical values of CTE is obtained for glass-reinforced plastics on epoxy resin, which were not subjected to thermal aging.

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Determination of the coefficient of thermal expansion of epoxy composites

Cited by 14 publications

References 6 publications

Fabrication and characterization of nano filler-filled epoxy composites for underfill application

Fabrication and characterization of nano filler-filled epoxy composites for underfill application

Effect of reinforcement of sustainable β‐CaSiO₃ nanoparticles in bio‐based epoxy resin system

Non-Linearity of Thermosetting Polymers’ and GRPs’ Thermal Expanding: Experimental Study and Modeling

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Determination of the coefficient of thermal expansion of epoxy composites

Cited by 14 publications

References 6 publications

Fabrication and characterization of nano filler-filled epoxy composites for underfill application

Fabrication and characterization of nano filler-filled epoxy composites for underfill application

Effect of reinforcement of sustainable β‐CaSiO3 nanoparticles in bio‐based epoxy resin system

Non-Linearity of Thermosetting Polymers’ and GRPs’ Thermal Expanding: Experimental Study and Modeling

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Effect of reinforcement of sustainable β‐CaSiO₃ nanoparticles in bio‐based epoxy resin system