Dynamic Mechanical Thermal Analysis of Polymer Nanocomposites

Jayanarayanan, Karingamanna; Rasana, Nanoth; Mishra, Raghvendra Kumar

doi:10.1016/b978-0-323-46139-9.00006-2

Cited by 25 publications

(17 citation statements)

References 103 publications

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“…Extensive review on the topic covering all these fields is beyond the scope of this work. Furthermore, macroscopic and/or microscopic modeling approaches using DMA data to model the viscoelastic behavior of filled polymers [46][47][48][49] are not reviewed in this article.…”

Section: Introductionmentioning

confidence: 99%

Use of Dynamic Mechanical Analysis (DMA) for Characterizing Interfacial Interactions in Filled Polymers

Bashir

2021

Solids

116

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Dynamic mechanical analysis (DMA) provides reliable information about the viscoelastic behavior of neat and filled polymers. The properties of filled polymers are relevant to different industries as protective organic coatings, composites etc. Interfacial interactions in filled polymers play an important role in determining their bulk properties and performance during service life. In this brief review article, studies that used DMA to characterize the interfacial interactions in filled polymers have been reviewed. The available open literature provides a mixed opinion about the influence of interfacial interactions on the glass transition temperature of filled polymers. Nevertheless, it appears that in the case of strong interfacial interactions between the filler particles and the polymeric matrix, the peak value of tan δ is reduced in comparison to that of a filled polymer where these interactions are weak.

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Section: Introductionmentioning

confidence: 99%

Use of Dynamic Mechanical Analysis (DMA) for Characterizing Interfacial Interactions in Filled Polymers

Bashir

2021

Solids

116

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“…Tan δ is the ratio between the loss modulus (mechanical dissipation energy) and the storage modulus (storage energy) and thus it correlates with the mechanical damping capacity 32,33 of the material. Polymers, with their unique viscoelasticity, have been widely used as vibration damping materials for both the prevention of vibrational fatigue failure and the reduction of unwanted noise 34 .…”

Section: Resultsmentioning

confidence: 99%

Integrating ricinoleic acid derivates to thermoset polymers with tunable properties

Hernández

Marcovich

Mosiewicki

2021

Polymer International

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A highly functionalized biobased derivative of ricinoleic acid (MMRA) was synthesized through a two‐step procedure: maleinization of the hydroxyl group naturally present in this fatty acid followed by methacrylation of the carboxylic acid groups. The chemical structure of MMRA was confirmed by 1H NMR, infrared spectroscopy, gel permeation chromatography and analytical determinations. Thermoset polymers were further obtained by the free radical polymerization of MMRA with different amounts of styrene. The dependence of the color/transparency and tensile properties on sample composition was evaluated. Moreover, thermogravimetric and dynamic mechanical analyses were carried out to further characterize the obtained materials. All polymers were highly translucent with lightness values in the range 87.4–90.8 and opacity values below 13%. Their glass transition temperatures (Tg) ranged from 61.5 °C for the homopolymer MMRA to 104 °C for the copolymer containing 30 wt% MMRA. The rubbery storage modulus increased with MMRA content confirming the high functionality of the green precursor that led to polymers with high crosslinking density. Notably, pronounced damping capacity was also found in all copolymers made from MMRA / styrene. © 2021 Society of Chemical Industry

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“…Finally, it is well known that toughness of polymers has direct relationship with surface under area of T g peak in Tan δ versus temperature diagram. 25 It is clear in Figure 6B that the surface under area of the first peak, assigned to the T g of PLA, increased in PLA/PC/Silica/DCP and PLA/PC/Silica/Co nanocomposites, which implies their higher toughness.…”

Section: Crystallinity and Morphology Analysesmentioning

confidence: 91%

Preparation and properties of enhanced nanocomposites based on PLA/PC blends reinforced with silica nanoparticles

Hedayati

Moshiri-Gomchi

Assaran‐Ghomi

et al. 2019

Polymers for Advanced Techs

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In order to lower brittleness of biobased polylactic acid (PLA), its blending with polycarbonate and nanosilica is aimed. In this line, to increase compatibility of the ingredients, dicumyl peroxide (DCP) and Cobalt (II) acetylacetonate (Co) were used as grafting and transesterification catalysts, respectively. The X-ray diffraction (XRD) spectra demonstrated high compatibility of the ingredients by broadening of the PLA characteristic peaks and, also, good dispersion of nanosilica particles, especially in PLA/PC/Silica/Co sample. The EDX maps confirmed good nanosilica dispersion, too. The silica nanoparticle size was ranged from 20 to 100 nm in transmission electron microscopy (TEM) pictures. All nanocomposites showed improved thermal stability in thermogravimetric analysis (TGA). Differential scanning calorimetry (DSC) results demonstrated lower T g , T m , and crystallinity values for the fabricated nanocomposites. Notably, the dynamic mechanical thermal analysis (DMTA) curves confirmed the T g , T m , and T cc trend obtained in DSC; moreover, much higher surface under tan δ peak for PLA/PC/Silica/Co sample was obtained, which implies its higher toughness. The precise tensile study of the samples confirmed significantly higher elongation at break of the nanocomposites, more considerably in PLA/PC/Silica/Co sample, with nearly negligible defect on tensile strength and modulus. In a concise, the obtained results confirmed the higher efficiency of Co catalyst, which leads to the sample with improved characteristics compared with DCP.

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Dynamic Mechanical Thermal Analysis of Polymer Nanocomposites

Cited by 25 publications

References 103 publications

Use of Dynamic Mechanical Analysis (DMA) for Characterizing Interfacial Interactions in Filled Polymers

Use of Dynamic Mechanical Analysis (DMA) for Characterizing Interfacial Interactions in Filled Polymers

Integrating ricinoleic acid derivates to thermoset polymers with tunable properties

Preparation and properties of enhanced nanocomposites based on PLA/PC blends reinforced with silica nanoparticles

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