Dielectric behavior of OPEFB reinforced polycaprolactone composites at X-band frequence / Ahmad Fahad in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 1 (03/2016)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 1 (03/2016) . - p. 18-25 Titre : Dielectric behavior of OPEFB reinforced polycaprolactone composites at X-band frequence Type de document : texte imprimé Auteurs : Ahmad Fahad, Auteur ; Z. Abbas, Auteur ; S. J. Obaiys, Auteur ; N. Ibrahim, Auteur ; A. Yakubu, Auteur Année de publication : 2016 Article en page(s) : p. 18-25 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Charges (matériaux) Composites à fibres courtes Diélectriques Etat fondu (matériaux) Huile de palme et constituants Micro-ondes Morphologie (matériaux) Poly-e-caprolactone Index. décimale : 668.4 Plastiques, vinyles Résumé : Short fibres are often used as reinforcing materials with thermoplastic polymers to improve the dielectric properties of the composites. In this work, the effects of oil palm empty fruit bunch (OPEFB)-fibre loading on polycaprolactone (PCL) polymer were extensively studied. The synthesis of OPEFB-PCL composites were prepared via melt blend method. Theoretical and experimental analysis of electromagnetic (EMI) propagation, absorption and shielding effectiveness (SE) properties of the composite were also studied. The magnitudes of S-parameters for OPEFB fiber-reinforced PCL composites with different percentages of filler were measured by a rectangular waveguide connected with a microwave vector network analyzer (VNA) at (8 – 12) GHz frequency. Whilst the dielectric properties were studied using an open ended coaxial probe. The morphological characterization of the OPEFB-PCL composite was carried out using X-ray diffraction and scanning electron microscopy (SEM). This work showed that XRD profile patterns slightly changed duo to the filler loading increment which result a reduction in both dielectric constant and loss factor. However, the relative permittivity of pure oil palm fibre and PCL was measured as (1.8-j*0.08) and (2.929-j*0.3242) respectively. In addition, the composition of 12.5 wt% filler gave the highest dielectric constant and loss factor values. However, the reflection loss increases to filler content increments at the maximum frequency of 12 GHz. The excellent behavior of these polymer composites makes them superior nominees for microwave low absorption materials. Note de contenu : - THEORY : Transmission line method - Theory of network analyzers - EXPERIMENTAL DETAILS : Preparation of OPEFB fibre - Preparation of OPEFB-PCL composites - Preparation of test sample - Measurements and characterization - S-parameter measurement - RESULTS AND DISCUSSION : Morphology - Microwave results DOI : 10.3139/217.3069 En ligne : https://drive.google.com/file/d/1ZV4HwwyeHXgQBYiB6UnynFGgG4EQc2bo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25762 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17899	-	Périodique	Bibliothèque principale	Documentaires	Disponible

The effect of ZnO nanoparticle filler on the attenuation of ZnO/PCL nanocomposites using microstrip line at microwave frequency / Abubakar Yakubu in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 2 (05/2015)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 2 (05/2015) . - p. 227-232 Titre : The effect of ZnO nanoparticle filler on the attenuation of ZnO/PCL nanocomposites using microstrip line at microwave frequency Type de document : texte imprimé Auteurs : Abubakar Yakubu, Auteur ; Z. Abbas, Auteur ; F. Esa, Auteur ; P. Tohidi, Auteur Année de publication : 2015 Article en page(s) : p. 227-232 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux) Matériaux hybrides Micro-ondes Nanoparticules Oxyde de zinc Poly-e-caprolactone Index. décimale : 668.4 Plastiques, vinyles Résumé : This paper describes attenuation measurement using the modified microstrip line technique from new microwave substrate material. The magnitudes of the transmission coefficient (S21) from the microstrip measurement were used to determine the attenuation of the ZnO/PCL nanocomposites substrate with respect to different percentages of ZnO nanoparticles filler. Result from the measurement showed amongst others that as the filler content increases, the attenuation increases. The highest magnitude for attenuation was calculated for the 70% ZnO nano filler with a value of 14.92 dB and the least attenuation was calculated for the 25% ZnO nano filler, which value gave 6.72 dB which is very good for shielding applications. Transmission electron microscope (TEM) was used to analyse the average particle size of the ZnO powder used as filler in the study. The analysis showed that the average particle size was 52.7 nm. DOI : 10.3139/217.2993 En ligne : https://drive.google.com/file/d/1cOz_KRTOo2yYwtzSB0JPFlNgPWHwZMpv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23896 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17180	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)