Positron Lifetime Spectroscopy and Differential Scanning Calorimetric study of polystyrene‐based composites with fly ash, cenospheres, and calcium aluminosilicate as fillers

Altaweel, Abdullah Mohammed Ali Mohammed; Ranganathaiah, C.; Siddramaiah, B.

doi:10.1002/app.31852

Cited by 6 publications

(4 citation statements)

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“…Similar types of results have reported for polyethylene oxide/starch blends and polyvinyl alcohol/Graphene oxide composite respectively . The decreased elongation at break as a function of SGF loading is attributed to the reduced ductility of SGFR‐PBT composites due to the incorporation of short glass fibers .…”

Section: Resultssupporting

confidence: 81%

“…As the concentration of SGF increases both tensile strength and Young's modulus of SGFR-PBT composites increases gradually and show maximum value at 40 wt% of SGF. This increased value of both tensile strength and Young's modulus with silane treated short glass fiber is due to the random distribution of fibers in the polymer matrix and the improved adhesion between the fiber and matrix by the induced chemical interactions [9,27,28]. The improved adhesion between the fiber and matrix transfers stress through fibers and thereby increases the tensile strength and Young's modulus of the composites [29][30][31].…”

Section: Mechanical Properties Resultsmentioning

confidence: 99%

“…The elongation at break decreases as a function of fiber loading and show minimum value for 20, 30, and 40 wt% of SGF. This reduction in the value of elongation at break is attributed to the restriction imposed to the deformation capacity of the matrix by the improved adhesion between the fiber and matrix .…”

Section: Resultsmentioning

confidence: 99%

“…It is well established that the macroscopic properties such as tensile strength (TS), Young's modulus (YM), elongation at break (EB), and toughness are always influenced by the microstructure of the polymeric system. The free volume cavities and their concentration have been used in understanding the viscoelastic properties of many polymeric systems . This property depends on the chain morphology of the system, i.e.…”

Section: Resultsmentioning

confidence: 99%

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Effect of hydrodynamic interaction on free volume changes and the mechanical properties of SGFR‐PBT composites

Munirathnamma

Ravikumar

2016

Polymer Composites

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In order to explore the effect of short glass fiber reinforcement (SGFR) on the mechanical properties of polybutylene terephthalate (PBT), 10–40 wt% of short glass fibers (SGF) are reinforced into PBT matrix. Microstructural characterization has been performed by positron lifetime technique. The fractional free volume obtained experimentally show negative deviation at 20, 30, and 40 wt% of SGF from the linear additivity relation. This indicates the improved adhesion between the short glass fiber and PBT matrix at 20, 30, and 40 wt% of SGF. The evaluated hydrodynamic interaction parameter (h) suggests the generation of excess friction at the interface of SGFR‐PBT composites. The positron lifetime parameters of SGFR‐PBT composites are correlated with the mechanical properties viz., tensile strength (TS), Young's modulus (YM), and elongation at break (EB). The decrease of crystallinity and average crystallite size of SGFR‐PBT composites evaluated by X‐ray diffraction results indicate the induced chemical interaction between PBT side chain and SGF due to the silane treatment of E‐glass fibers. The decreased positron lifetime parameters, reduced crystallinity, and crystallite size and improved mechanical properties are attributed to the improved chemical and physical interaction between the functional groups of SGF and PBT matrix. This is also evident from Fourier transform infrared spectrometry (FTIR) studies. POLYM. COMPOS., 39:1878–1886, 2018. © 2016 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 81%