Enhancing the mechanical properties of an epoxy resin using polyhedral oligomeric silsesquioxane (POSS) as nano-reinforcement

Mishra, Kunal; Pandey, Gajendra; Singh, Raman P.

doi:10.1016/j.polymertesting.2017.06.031

Cited by 66 publications

(50 citation statements)

References 37 publications

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“…Polyhedral oligomeric silsesquioxanes (POSS) are novel hybrid materials that have three‐dimensional inorganic–organic, structurally well‐defined cage‐like molecules and the sizes range from 1 to 3 nm, with the empirical formula RSiO 1.5 (where R may be a hydrogen atom or an organic functional group, for example, alkyl, alkylene, acrylate, hydroxyl, or epoxide unit). As a result of advantageous properties created by the possibility of incorporation of variety of reactive functional groups into their molecule, POSS have a wide range of applications, including modification of both thermoplastic and thermoset polymeric materials by chemical cross‐linking or physical blending methods .…”

Section: Introductionmentioning

confidence: 99%

“…The presence of reactive groups, which can interact with the polymer matrix and modify the properties of the polymer layer at the interface, causes that the POSS affect the processability and physical–mechanical properties of the composite such as thermal and viscoelastic properties, mechanical strengths, dielectric constants, surface hydrophobicity, and flame‐retardancy . However, it should be noted that type of influence of the POSS on the properties of polymer composite depends on various factors, that is, POSS structure and type of polymer (an elastomer, a plastomer), processing conditions as well as compatibility of POSS with the polymer.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Polyhedral Oligomeric Silsesquioxanes Nanoparticles on Thermal and Mechanical Properties of Poly(vinyl chloride) Composite Materials

Tomaszewska

Sterzyński

Skórczewska

2018

Vinyl Additive Technology

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The modification of poly(vinyl chloride) (PVC) by polyhedral silsesquioxane containing both methacryl and octyl groups (MeOctPOSS) was the task of studies. The PVC nanocomposites with MeOctPOSS concentration between 1 and 10 wt% were prepared by melt mixing processing, and the homogeneity of MeOctPOSS dispersion in the polymeric matrix was confirmed by scanning electron microscopy and energy dispersive spectroscopy observations. The influence of MeOctPOSS on glass transition temperature (Tg) determined by means of dynamic mechanical thermal analysis (DMTA) and differential scanning calorimetry (DSC) was observed, whereas, higher the measurement frequency, higher the glass transition temperature was noted. The MeOctPOSS concentration‐dependent PVC glass transition temperature was shifted from 73.8°C to about 68°C (ƒ = 1 Hz) and from 76.5°C to 70.8°C (ƒ = 10 Hz) for increasing additive content. Similar result of decreasing Tg value was observed by DSC method. An introduction of 10 wt% of MeOctPOSS into the PVC matrix results in a visible decrease of the maximum value of loss modulus (G′) of approximately 12% and 18% by 1 Hz and 10 Hz, respectively, as well as in a significant reduction of the static elastic modulus. It was stated that the polyhedral oligomeric silsesquioxanes with both methacryl and octyl groups may act as plasticizers of the PVC matrix. J. VINYL ADDIT. TECHNOL., 25:E48–E54, 2019. © 2018 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Polyhedral Oligomeric Silsesquioxanes Nanoparticles on Thermal and Mechanical Properties of Poly(vinyl chloride) Composite Materials

Tomaszewska

Sterzyński

Skórczewska

2018

Vinyl Additive Technology

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“…This decrease in the fracture toughness value is due to the formation of POSS agglomerates that deteriorates the material. The formation of POSS agglomerates and its influence on the mechanical properties are explained in detail in our previous work [30,31]. The nanocomposite prepared without solvent shows an increase in the fracture toughness by 40% at 5 wt%.…”

Section: Fracture Toughnessmentioning

confidence: 89%

“…There have been extensive studies on the formation of POSS as reinforcement, or formation of nanoscale structure to modify the mechanical and thermal behavior [20][21][22][23][24][25][26][27][28][29]. In our previous work, we have reinforced epoxy resin with the POSS molecule, and we have observed that based on a compatible POSS molecule, the fracture toughness increases by 200% compared to the neat resin at room temperature [16,30] or at cryogenic conditions [31]. It is generally believed that the quality of POSS dispersion in the epoxy resin is directly correlated to its efficiency in the improvement of mechanical, electrical and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

The effect of solvent on the mechanical properties of polyhedral oligomeric silsesquioxane (POSS)–epoxy nanocomposites

et al. 2019

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The present study investigated the influence of different compatibilizer on the dispersion of polyhedral oligomeric silsesquioxane (POSS). The effect of POSS dispersion in the epoxy resin in terms of mechanical, and thermal properties were reported. The three solvent used to disperse POSS in this work are ethanol, acetone, and toluene. The POSS was initially dispersed in the solvent followed by an addition in the epoxy resin by systematically varying the weight fraction from 0.5 to 8 wt%. Mechanical properties of nanocomposites were characterized in terms of elastic modulus, and fracture toughness. The obtained result illustrates that nanocomposites prepared by polar solvent dispersion such as ethanol showed an increase in values of elastic modulus and fracture toughness value. The increase in the modulus and fracture toughness value is due to the better interaction between POSS and ethanol disperse the POSS uniformly in the epoxy resin while avoiding the agglomeration. However, nanocomposites prepared by nonpolar solvent does not show substantial change in the mechanical properties. Fractured surface morphology was studied using scanning electron microscopy. Differential scanning calorimetry and dynamic mechanical analysis illustrates that with better POSS dispersion value of glass transition temperature (T g) increased. Fourier transformation infrared spectroscopy showed that POSS completely interacted with the epoxy resin and no phase separation was observed.

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“…It is believed that the quality of POSS dispersion in the epoxy resin is directly correlated to its efficiency in the improvement of mechanical, electrical, and thermal properties. In our previous work , we have reinforced epoxy using three different functionalities of POSS. This study showed that the inclusion of POSS leads to significant increase in the fracture toughness value.…”

Section: Introductionmentioning

confidence: 99%

Quantitative evaluation of the effect of dispersion techniques on the mechanical properties of polyhedral oligomeric silsesquioxane (POSS)–epoxy nanocomposites

Mishra

Singh

2018

Polymer Composites

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This experimental study investigates the effects of dispersion techniques on the mechanical properties of POSS‐epoxy nanocomposites. The POSS is dispersed into the epoxy resin by stoichiometrically varying the weight fraction from 0.5 to 10 wt% and materials are prepared using three different dispersion techniques. Various mechanical properties are reported as functions of processing parameters and weight fractions. It is found that the nanocomposites with highly dispersed POSS show higher modulus and toughness values. For example, nanocomposites prepared by ultrasonication show increases in elastic and flexural modulus values by average amounts of 23% and 15%, respectively. Also, it is found that fracture toughness values increased for all three processing techniques, with the highest increase by an average of 50% at 8 wt% of POSS inclusion for nanocomposites prepared by ultrasonication. TEM images of the nanocomposites demonstrate that the properties are also affected by the formation of soft domains at higher loading levels of POSS. Further evidence on the soft domains is found in the variations of Tg. FTIR spectroscopy shows evidence of SiOSi stretching, again suggesting the formation of compliant domains due to POSS‐POSS agglomeration. POLYM. COMPOS., 39:E2445–E2453, 2018. © 2018 Society of Plastics Engineers

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Enhancing the mechanical properties of an epoxy resin using polyhedral oligomeric silsesquioxane (POSS) as nano-reinforcement

Cited by 66 publications

References 37 publications

Effect of Polyhedral Oligomeric Silsesquioxanes Nanoparticles on Thermal and Mechanical Properties of Poly(vinyl chloride) Composite Materials

Effect of Polyhedral Oligomeric Silsesquioxanes Nanoparticles on Thermal and Mechanical Properties of Poly(vinyl chloride) Composite Materials

The effect of solvent on the mechanical properties of polyhedral oligomeric silsesquioxane (POSS)–epoxy nanocomposites

Quantitative evaluation of the effect of dispersion techniques on the mechanical properties of polyhedral oligomeric silsesquioxane (POSS)–epoxy nanocomposites

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