Polypropylene–nanosilica‐filled composites: Effects of epoxy‐resin‐grafted nanosilica on the structural, thermal, and dynamic mechanical properties

Reddy, Chaganti Srinivasa; Das, C. K.

doi:10.1002/app.24131

Cited by 36 publications

(10 citation statements)

References 19 publications

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“…When COOH-MWCNTs are introduced into system, there would, on the one hand, result in a decrease in thermal stability, which can be due to the weakened Van der Waals interaction between polymer chains [25] and the lowered T g shown in Table 3. On the other hand, the addition of COOHMWCNTs can also increase the thermal stability due to their hindering effect to the thermal motion of polymer molecular chains [26]. However, the final result of COOH-MWCNTs on the thermal stability, arising from the antagonistic competition of these two effects, is that the addition of COOHMWCNTs slightly improves the thermal stability of DGEBA/EMI-2,4 system.…”

Section: Resultsmentioning

confidence: 99%

Effect of silane treatment of carboxylic-functionalized multi-walled carbon nanotubes on the thermal properties of epoxy nanocomposites

Zhou¹,

Wang²,

Liu³

et al. 2010

Express Polym. Lett.

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Abstract. The effect of silane treatment of carboxylic-functionalized multi-walled carbon nanotubes (COOH-MWCNTs) on the thermal properties of COOH-MWCNTs/epoxy nanocomposites was studied by comparing the research results on differential scanning calorimetry and thermogravimetric analysis data of silane treated COOH-MWCNTs/epoxy system with those of as-received COOH-MWCNTs/epoxy system. At the initial curing stage, silane treatment of COOH-MWCNTs does not change the autocatalytic cure reaction mechanism of COOH-MWCNTs/diglycidyl ether of bisphenol-A glycidol ether epoxy resin/2-ethyl-4-methylimidazole (COOH-MWCNTs/DGEBA/EMI-2,4) system, however, silane treatment of COOH-MWCNTs has catalytic effect on the curing process, which could help to shorten pre-cure time or lower pre-temperature. Then, at the later curing stage, silane treatment of COOH-MWCNTs promotes vitrification, which would help to shorten post-cure time or lower post-temperature. Therefore, overall, silane treatment of COOH-MWCNTs could bring positive effect on the processing of epoxy nanocomposites. Furthermore, it was also found that silane treatment of COOH-MWCNTs does not affect the thermal degradation pattern of COOH-MWCNTs/DGEBA/EMI-2,4 system, however, decreases the thermal stability of COOH-MWCNTs/DGEBA/EMI-2,4 nanocomposites.

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Section: Resultsmentioning

confidence: 99%

Effect of silane treatment of carboxylic-functionalized multi-walled carbon nanotubes on the thermal properties of epoxy nanocomposites

Zhou¹,

Wang²,

Liu³

et al. 2010

Express Polym. Lett.

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“…Reddy et al manufactured polypropylene (PP)/nano-silica (NS) nanocomposites [56]. The modulus of PP-NS was much higher than that of pure PP, and that of PP-ENS (epoxy-resin-grafted nano-silica) was higher than that of pure PP, but lower than PP-NS.…”

Section: Properties Of Polymer-based Nanocompositesmentioning

confidence: 99%

Nanocomposites Derived from Polymers and Inorganic Nanoparticles

2010

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Polymers are considered to be good hosting matrices for composite materials because they can easily be tailored to yield a variety of bulk physical properties. Moreover, organic polymers generally have long-term stability and good processability. Inorganic nanoparticles possess outstanding optical, catalytic, electronic and magnetic properties, which are significantly different their bulk states. By combining the attractive functionalities of both components, nanocomposites derived from organic polymers and inorganic nanoparticles are expected to display synergistically improved properties. The potential applications of the resultant nanocomposites are various, e.g. automotive, aerospace, opto-electronics, etc. Here, we review recent progress in polymer-based inorganic nanoparticle composites.

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“…The agglomerated particles can not impose any restrictions on molecular mobility, and thereby resulting in a lower T g . Previous studies 7,8 suggested that high thermal stability of polymers in the presence of fillers is due to the hindered thermal motion of polymer molecular chains. Chemical bonds established between nano-SiC particles and epoxy strengthen the interface interaction, which would restrict the thermal motion of epoxy resin chains, and therefore, on the other hand, the addition of nano-SiC particles can also increase the thermal stability.…”

mentioning

confidence: 99%

“…Studies have shown that the performance of polymeric materials can be improved by adding a small amount (<5 wt %) of inorganic nanofillers without compromising weight or processability of the composites. [2][3][4][5][6][7][8] The challenges are to obtain remarkable improvements in the interfacial bonding between polymer matrix and nanofillers. Stronger interfacial bonding will impart better properties.…”

mentioning

confidence: 99%

Study on Mechanical, Thermal and Electrical Characterizations of Nano-SiC/Epoxy Composites

Zhou

Wang

et al. 2009

Polym. J.

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This report covers the results of a study on evaluating the effect of nano-SiC particles on mechanical, thermal and electrical properties of epoxy by lap shear, TGA, DSC and electrical tests. Epoxy composites filled with micro-SiC particles were also studied for comparison. The mechanisms of performance improvement were discussed in detail. The results showed that with identical loading, silane treated nano-SiC filled nanocomposites have the best properties. The volume resistivity decrease, dielectric constant " increase and loss tangent tanðÞ increase by addition of silane treated nano-SiC particles are smaller than those by the other fillers. Silane treatment of nanoparticles improves each performance, including increases shear strength, thermal stability, volume resistivity and decreases " and (). The addition of nano-SiC particles remarkably improves shear strength, " and tanðÞ, while slightly enhances thermal stability of epoxy. 8 vol. % silane treated nano-SiC/epoxy composite has the highest shear strength 10.6 MPa with the maximum enhancement, 80%, over the neat resin. It also has good temperature independence of dielectric properties and enough volume resistivity, which meet the demand of some microelectronics materials.KEY WORDS: SiC/Epoxy Composites / Nanocomposites / Mechanical Properties / Thermal Properties / Dielectric Properties / Using inorganic nanofillers to produce high performance nanocomposites is attaining increasing interest. An interface interaction zone of 1 nm thick represents roughly 0.3 vol. % of microcomposites, whereas it can reach 30 vol. % of nanocomposites. 1 The contribution of interaction zone provides diverse possibilities of performance tailoring and is able to influence the performance to a much greater extent under rather low nanofiller loading. Studies have shown that the performance of polymeric materials can be improved by adding a small amount (<5 wt %) of inorganic nanofillers without compromising weight or processability of the composites.2-8 The challenges are to obtain remarkable improvements in the interfacial bonding between polymer matrix and nanofillers. Stronger interfacial bonding will impart better properties.SiC is a large band gap semiconductor (>2 eV) with good mechanical properties, high thermal stability (melting point $2800 C), high thermal conductivity ($390 W/mK), and high electric break down field ($4 Â 10 8 V/m). Such properties make SiC an attractive candidate for high temperature and high power applications in electronic industry.9 Epoxy resins also exhibit versatile applications in electrical and electronic industries, e.g., encapsulant of electrical circuits and electronic devices. Some studies involving the effect of nano-SiC particles on tensile response (stiffness and strength), 4 friction and wear, 5 curing process and curing kinetics 10 of epoxies have been conducted. Recently, developments in semiconductor and electronic packages require electrically insulating materials possessing high strength, good thermal stability, and low dielectric ...

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Polypropylene–nanosilica‐filled composites: Effects of epoxy‐resin‐grafted nanosilica on the structural, thermal, and dynamic mechanical properties

Cited by 36 publications

References 19 publications

Effect of silane treatment of carboxylic-functionalized multi-walled carbon nanotubes on the thermal properties of epoxy nanocomposites

Effect of silane treatment of carboxylic-functionalized multi-walled carbon nanotubes on the thermal properties of epoxy nanocomposites

Nanocomposites Derived from Polymers and Inorganic Nanoparticles

Study on Mechanical, Thermal and Electrical Characterizations of Nano-SiC/Epoxy Composites

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