Effects of boron nitrite in thermoplastic polyurethane on thermal, electrical and free volume properties

Dumludağ, Fatih; Yener, Murat Y.; Baştürk, Emre; Madakbaş, Seyfullah; Kahraman, Vezir; Umer, Muhammad; Yahşi, Uğur; Tav, Cumali

doi:10.1007/s00289-018-2560-2

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…The characteristic peaks of h -BN can be found in both the h -BN/TPU and ABN/TPU spectra, however, the intensity gets weaker due to the overlapping of the TPU and high-intensity additives peaks [ 27 ]. The overall FTIR results suggest that the inorganic fillers are not chemically linked but are physically attached to the TPU polymer and therefore there is no disappearance or appearance of new bonds in the h -BN/TPU and ABN/TPU composites [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

Generation of Self-Assembled 3D Network in TPU by Insertion of Al2O3/h-BN Hybrid for Thermal Conductivity Enhancement

Chi

et al. 2021

Materials

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Thermal management has become one of the crucial factors in designing electronic equipment and therefore creating composites with high thermal conductivity is necessary. In this work, a new insight on hybrid filler strategy is proposed to enhance the thermal conductivity in Thermoplastic polyurethanes (TPU). Firstly, spherical aluminium oxide/hexagonal boron nitride (ABN) functional hybrid fillers are synthesized by the spray drying process. Then, ABN/TPU thermally conductive composite material is produced by melt mixing and hot pressing. Then, ABN/TPU thermally conductive composite material is produced by melt mixing and hot pressing. Our results demonstrate that the incorporation of spherical hybrid ABN filler assists in the formation of a three-dimensional continuous heat conduction structure that enhances the thermal conductivity of the neat thermoplastic TPU matrix. Hence, we present a valuable method for preparing the thermal interface materials (TIMs) with high thermal conductivity, and this method can also be applied to large-scale manufacturing.

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Section: Resultsmentioning

confidence: 99%

Generation of Self-Assembled 3D Network in TPU by Insertion of Al2O3/h-BN Hybrid for Thermal Conductivity Enhancement

Chi

et al. 2021

Materials

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“…Previous studies reported that various fillers including natural fibers [11], cellulose nanocrystals [12], nano-clay [13] and boron nitride [14] can be used to improve the mechanical strength of PLLA. Among these fillers, boron nitride is one of the most interesting reinforcing fillers because of its good thermal and chemical stability, low reactivity and high mechanical strength [15,16]. Boron nitride has been used as a reinforcing filler for PLLA [14].…”

Section: Introductionmentioning

confidence: 99%

IMPROVEMENT IN MECHANICAL PROPERTIES OF FLEXIBLE POLY(L-LACTIDE)-b-POLYETHYLENE GLYCOL-b-POLY(L-LACTIDE) BIOPLASTIC BY MELT BLENDING WITH BORON NITRIDE

Phromsopha¹

2022

GEOMATE

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Poly(L-lactide)-b-polyethylene glycol-b-poly(L-lactide) triblock copolymer (PLLA-PEG-PLLA)/boron nitride (BN) composites with BN contents of 1, 2 and 4 wt.% were prepared by melt blending. Scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and tensile testing were carried out to characterize the phase morphologies, thermal properties and mechanical properties of composite films. The BN particles showed good distribution and dispersion throughout the film matrices as observed from SEM. DSC analysis showed that increasing crystallinity content and decreasing half crystallization-time of PLLA-PEG-PLLA/BN composites were obtained when the BN content was increased. The ultimate tensile stress significantly increased and strain at break steadily decreased with an increase in the BN content. These results showed that the BN particles enhanced crystallizability and mechanical properties of PLLA-PEG-PLLA.

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“…Defects or cavities of polymers because of chemical structure are called “free volume”. Free volume in polymers can explain the important physical properties such as viscosity, conductivity, glass transition temperature, mechanical and thermodynamic properties (Dumludag et al , 2019; Yahsi et al , 2019; Utpalla et al , 2019; Ningaraju et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

Free volume, thermal and morphological properties of photo-crosslinked thiol-Ene/ nanodiamond hybrid network

Çi̇ği̇l

Madakbaş

Tav

et al. 2020

PRT

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Purpose The purpose of this research paper is to investigate the changes in free volume by adding acrylate modified nanodiamond particles. In this study, a cross-linked thiol-ene (T) network was obtained under ultraviole light. The changes in free volume were analyzed when acrylate-modified nanodiamond (M-ND) particles were added to the nanocomposites obtained. Positron annihilation lifetime spectroscopy (PALS), a well-established method, was used for this analysis. In addition, the effect of nanocomposites containing different ratios of acrylate M-ND particles (1, 2, 3 and 5 Wt. %) on the surface and the thermal properties were also examined. Design/methodology/approach The impact of different quantities of acrylate M-ND on the free volume and surface morphological properties of thiol-ene polymer networks were studied by using scanning electron microscopy, differential scanning calorimetry, attenuated total reflection, Fourier transform infrared spectroscopy, PALS and thermogravimetric analysis measurements. Findings The thermal properties of T/M-ND were found to depend on the weight percentages of the M-ND content. For increasing weight percentages of M-ND added to thio-lene polymer networks, the glass transition temperature (Tg) increased from 103°C to 154°C. The ortho-positronium (o-Ps) lifetime (free volume) and free volume fraction characterization of T/M-ND nanocomposites were investigated using PALS. Increasing temperature caused both the o-Ps lifetime (free volume) to change with increasing saturation and to linearly increase the intensity; however, an increasing weight percentage of M-ND caused no change at all for the o-Ps lifetime (free volume) and the free volume fraction. Originality/value According to published literature, and to the best of the authors’ knowledge, this is the first time a study examining the free volume properties in a thiol-ene system has been carried out.

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Effects of boron nitrite in thermoplastic polyurethane on thermal, electrical and free volume properties

Cited by 5 publications

References 28 publications

Generation of Self-Assembled 3D Network in TPU by Insertion of Al2O3/h-BN Hybrid for Thermal Conductivity Enhancement

Generation of Self-Assembled 3D Network in TPU by Insertion of Al2O3/h-BN Hybrid for Thermal Conductivity Enhancement

IMPROVEMENT IN MECHANICAL PROPERTIES OF FLEXIBLE POLY(L-LACTIDE)-b-POLYETHYLENE GLYCOL-b-POLY(L-LACTIDE) BIOPLASTIC BY MELT BLENDING WITH BORON NITRIDE

Free volume, thermal and morphological properties of photo-crosslinked thiol-Ene/ nanodiamond hybrid network

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