The Effect of Polar Aluminium Trihydrate Molecules on the Dielectric Relaxations of Low-Density Polyethylene

Miličević, Dejan; Suljovrujić, E.; Kostoski, D.; Spasović, Slavica; Novaković, Lj.

doi:10.4028/www.scientific.net/msf.453-454.505

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…In addition, the increase in ATH loading from 50 phr to 80 phr caused huge reductions in resistivity for both unirradiated and (50 kGy)‐irradiated specimens, a finding which can be explained by the ATH contributing a substantial number of polar hydroxyl functional groups to the blends. They enhanced the migration of charges through the LPE matrix . However, the opposite outcome was observed when the ATH loading level was increased from 80 phr to 120 phr, whereby the SR and VR of the LPE blends became higher; this result might have been due to the shorter distance between ATH particles at their interface.…”

Section: Resultsmentioning

confidence: 94%

Effects of irradiation on the mechanical, electrical, and flammability properties of (low‐density polyethylene)/(ethylene‐[vinyl acetate] copolymer) blends containing alumina trihydrate

Bee

Hassan

Ratnam

et al. 2014

Vinyl Additive Technology

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Alumina trihydrate (ATH) was added to (low-density polyethylene)/(ethylene-[vinyl acetate] copolymer) blends (LPEs) to enhance their flame resistance. The addition of substantial amounts of ATH has been known to have deleterious effects on the mechanical properties of such blends. Hence, electron beam irradiation was used to improve the mechanical properties of our ATH-filled LPE specimens. The specimens were irradiated at 50 to 150 kGy before being cut into specified shapes for analysis. The increase in the irradiation dosage increased the gel content as a result of the formation of crosslinked networks. Also, the flame resistance of the LPE blends was enhanced by increasing both the loading level of ATH and the irradiation dosage. However, a high ATH loading level reduced tensile strength and elongation at break. Nevertheless, the electron beam irradiation maintained the tensile strength and elongation of the ATH-filled blends. In addition, a higher content of ATH in the LPE blends showed reactive interaction with irradiation effects. A higher amount of ATH reduced the electrical resistivity of the blends, but analysis of their surface and volume resistivity showed that the electrical resistance of the ATH-filled LPE blends could be improved by electron beam irradiation in the range of 50 to 150 kGy. J. VINYL ADDIT. TECHNOL., 20:91-98, 2014.

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Section: Resultsmentioning

confidence: 94%

Effects of irradiation on the mechanical, electrical, and flammability properties of (low‐density polyethylene)/(ethylene‐[vinyl acetate] copolymer) blends containing alumina trihydrate

Bee

Hassan

Ratnam

et al. 2014

Vinyl Additive Technology

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“…Accordingly, it may be possible to use PE thin film in micro and nano-size energy storage systems. [13], polar alüminyum trihidrat moleküllerinin düşük yoğunluklu polietilenin dielektrik özelliklerine etkisinin incelendiği [14], ışımaya maruz kalmış yüksek yoğunluklu polietilendeki moleküler rölaksasyonlara etkisinin incelendiği [15], kablolarda yalıtıcı olarak kullanılan çapraz bağlı polietilendeki dipolar rölaksasyonların incelendiği [16], düşük yoğunluklu polietilende α-rölaksasyonuna nemin etkilerinin incelendiği [17], yapay morötesi ışımaya maruz bırakılmış düşük yoğunluklu polietilenin dielektrik özelliklerinin incelendiği [18], karbon katkılı polietilen kompozitlerin dielektrik özelliklerinin incelendiği [19], yüksek elektrik alan etkisi altındaki düşük youğunluklu polietilenin dielektrik kayıp faktörünün incelendiği [20], düşük yoğunluklu polietilennin dielektrik özelliklerine asit uygulamalarının etkilerinin incelendiği [21], boron nitrat katkılı polietilen nanokompozitlerin güçlendirilmiş dielektrik özelliklerinin incelendiği [22], nanosilika katkılı düşük yoğunluklu polietilen kompozitlerin dielektrik özelliklerinin incelendiği [23], reaktif plazma polimerizasyon ile üretilmiş azot içeren plazma polietilenin dielektrik ve optik özelliklerinin incelendiği [24], grafit katkılı çok tabakalı polietilen kompozitlerin mekanik, dielektrik ve kristal özelliklerinin incelendiği [25], polipirol katkılı polietilenin DC iletkenlik özelliklerinin incelendiği [26] çalışmalar literatürden bilinmektedir. Bu çalışmalardan, ZnO partiküllerinin eklenmesi ile üretilmiş külçe boyutlarındaki polietilen nanokompozitlerin dielektrik özelliklerinin incelendiği [1], Si/SiO 2 katkılanmış külçe boyutlarında polietilen kompozitlerin dielektriksel, yapısal ve termal özelliklerinin incelendiği [3] ve Fe3O4 katkılanmış yüksek yoğunluklu polietilen nanokompozitlerin termal ve dielektrik özeliklerinin incelendiği [5] çalışmalarda külçe halindeki PE'nin yaklaşık 10 5 Hz de sahip olduğu dielektrik sabitin yaklaşık 2 olarak elde edilmiştir.…”

Section: ö N E ç I K a N L A R unclassified

Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti

Yakut

2021

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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 Determination of glass transition temperature by VFT model  Higher dielectric constant of PE thin film compared to dielectric constant of bulk PE  Determining glass transition temperature of PE thin film at higher temperatures than glass transition temperature of bulk PE Figure A. The dependence of the frequency value at which the maximum dielectric loss is observed from the dielectric loss obtained from the dielectric loss graph for 35000 g/mol and 750 nm thick polyethylene (PE) thin film (red dots and VFT fit curve) and the temperature dependence of the frequency values at which the maximum electric modulus is observed from the electric modulus graph (blue dots and activation curve) Purpose:The aim of this article is to analyze dielectric properties and glass transition temperature of PE thin film in comparison to bulk PE in order to evaluate the possible application opportunities of PE thin film in enery storage systems. Theory and Methods: PE thin film samples were deposited by thermal evaporation method between Al thin film electrodes under 10-5 Torr vacuum conditions. The dielectric spectroscopy measurements were operated by high frequency empedance analyzer. Results: The results show that thermal evaporation process causes breakage of PE main chain and occurance of oligomers and radicals. These oligomers and radicals may be the reason of increasing dielectric constant as a result of space-charge polarization. Also, the oligomers and radicals may react with each other and the main chain and cause the construction of cross-linked network. The presence of this network is the reason of increasing glass transition temperature. Conclusion: The results obtained for the change of dielectric constant and glass transition temperature show that PE thin films can be thought as candidate for organic energy storage systems.

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“…The increment of polar ATH amounts (-OH) could lead to higher migration ability of charges through the LE matrix. [21][22][23] Consequently, the samples with highest ATH loading level have the lowest VR and SR.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Investigation of enhancing effect of nano-montmorillonite on fire-retardant added low-density polyethylene–ethylene vinyl acetate hybrid system

Bee

Hassan

Ratnam

et al. 2013

Journal of Thermoplastic Composite Materials

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In this study, nano-montmorillonite (NMMT) was incorporated in alumina trihydrate (ATH) added low-density polyethylene-ethylene vinyl acetate (LDPE-EVA) for enhancing the mechanical and electrical properties of the hybrid blends. The Young's modulus of 50 phr ATH added LDPE-EVA (LE) blends has improved significantly, when the NMMT loading level increased from 5 to 15 phr. This is because the intercalation of NMMT particles reduces the cavities while enhancing the interfacial adhesion between the particle surface and LE matrix as observed via morphology analysis. The good interfacial adhesion could effectively transfer the stress from polymer matrix to filler's particles during straining and improved the mechanical properties. On the other hand, the volume resistivity of 5 phr added LE blends was gradually decreased as the loading level of ATH has increased from 50 to 150 phr. The surface and volume resistivity of LE blends exhibited that high polarity of ATH and NMMT molecules could increase the mobility of charges in passages through polymer matrix and surface. Thus, the incorporation of ATH and NMMT could reduce the electrical resistance of LE blends. In addition, the increasing of ATH loading

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The Effect of Polar Aluminium Trihydrate Molecules on the Dielectric Relaxations of Low-Density Polyethylene

Cited by 3 publications

References 6 publications

Effects of irradiation on the mechanical, electrical, and flammability properties of (low‐density polyethylene)/(ethylene‐[vinyl acetate] copolymer) blends containing alumina trihydrate

Effects of irradiation on the mechanical, electrical, and flammability properties of (low‐density polyethylene)/(ethylene‐[vinyl acetate] copolymer) blends containing alumina trihydrate

Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti

Investigation of enhancing effect of nano-montmorillonite on fire-retardant added low-density polyethylene–ethylene vinyl acetate hybrid system

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