Characterization of poly(ethylene-co-vinyl acetate) (EVA) filled with low grade magnesium hydroxide

Fernández, A. Inés; Ibarra, Laia Haurie; Formosa, J.; Chimenos, J.M.; Antunes, Maria Lúcia Pereira; Velasco, José Ignácio

doi:10.1016/j.polymdegradstab.2008.10.008

Cited by 46 publications

(40 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The vinyl acetate content can vary considerably and influences the physical properties and subsequent applications of the polymer. EVA with vinyl acetate contents ranging from 14 -28 % by weight are most commonly reported [2,3]. Like PE, EVA is inherently flammable so reduction of flammability through the incorporation of fire retardants (FRs) is often necessary.…”

Section: Introductionmentioning

confidence: 99%

An experimental and numerical model for the release of acetone from decomposing EVA containing aluminium, magnesium or calcium hydroxide fire retardants

Hewitt

Rhebat

Witkowski

et al. 2016

Polymer Degradation and Stability

View full text Add to dashboard Cite

Recent studies have identified acetone as an unexpected pyrolysis product of EVA containing aluminium or magnesium hydroxide fire retardants. It is thought that the freshly formed, open-pored, metal oxide, a thermal decomposition product of the metal hydroxide, traps acetic acid released from EVA and catalyses its conversion to acetone. Such a ketonisation reaction is well-established but the intermediate steps that result in acetic acid conversion to acetone in the presence of a metal oxide, trapped within the polymer matrix, have not been reported. This study used three model metal acetates: aluminium acetate, magnesium acetate and calcium acetate, to chemically represent the proposed metal acetate intermediate complexes. This provides crucial information on the kinetics of acetic acid trapping and subsequent acetone release during decomposition studied by TGA-FTIR, which has been used to generate kinetic models within a pyrolysis programme (ThermaKin), in order to quantitatively understand the processes occurring in fire retardant EVA. The benefit of using metal acetates is that they are simple enough to allow isolation of the chemical process of interest from the complications of acetic acid release from EVA and transport through the polymer matrix.

show abstract

Section: Introductionmentioning

confidence: 99%

An experimental and numerical model for the release of acetone from decomposing EVA containing aluminium, magnesium or calcium hydroxide fire retardants

Hewitt

Rhebat

Witkowski

et al. 2016

Polymer Degradation and Stability

View full text Add to dashboard Cite

show abstract

“…Then, it will be observed to decrease in tensile and flexural strength [13,24]. In the light of the results presented above, followings can be summarized; first is that increasing mineral content level decreases mechanical properties [12,25]. This is due to poor compatibility between filler and polymer matrix.…”

Section: Resultsmentioning

confidence: 89%

“…It was found that the dispersion of mineral particles and glass fibres in the matrix is roughly uniform, resulting in a significant increase in the flameretardant and mechanical properties of the system [24]. Similarly, Fernandez et al [25] indicated that to achieve suitable plastic formulations, it is necessary to reduce strongly the mineral particle size. This may affect not only the morphology, but the crystalline characteristics of the material.…”

Section: Resultsmentioning

confidence: 97%

Mi̇neral Takvi̇yeli̇ Kablo Tavalarinin Mekani̇k Özelli̇kleri̇ni̇ İyi̇leşti̇rmek İçi̇n Cam Elyaflarin Kullanilmasi

Atay

2017

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

View full text Add to dashboard Cite

Composite materials are able to improve the system performance by reducing redundancy. Different materials with the best characteristics can be combined to create a new material. In this study, a composite material was manufactured with glass fibre and inorganic mineral additives. It was aimed to produce strong, light-weight and flame retardant cable trays. Within this context, glass fibres were used to strengthen the mineral reinforced cable trays. Mechanical and flame retardant properties of composites were examined according to glass fibre loading and micro-nano size distribution of the mineral. Composite samples were prepared by adding glass fibres and huntite/hydromagnesite minerals with different ratios to poly vinyl chloride (PVC) matrix. Flame retardant property was studied through the limiting oxygen index (LOI) test. Mechanical effects of the glass fibre additives were investigated as a main objective of this work. It was observed that glass fibre additives improved the mechanical properties of the composites. Tensile strength increased from 38.4 to 65.8 MPa by adding 30% glass fibres. Keywords:Composites, cable trays, mechanical property, flame retardant, huntite/hydromagnesite MİNERAL TAKVİYELİ KABLO TAVALARININ MEKANİK ÖZELLİKLERİNİ İYİLEŞTİRMEK İÇİN CAM ELYAFLARIN KULLANILMASI ÖZKompozit malzemeler fazlalıkların azaltılması suretiyle sistem performansını arttırabilir. Yeni bir malzeme oluşturmak için en iyi özelliklere sahip farklı malzemeler kombine edilebilir. Bu çalışmada cam elyaf ve inorganik mineral katkı maddeleri kullanılarak bir kompozit malzeme üretilmiştir. Güçlü, hafif ve alev geciktirici özelliğe sahip kablo tavaları üretilmesi amaçlanmıştır. Bu kapsamda, cam elyafı mineral takviyeli kablo tavalarını güçlendirmek amacıyla kullanılmıştır. Kompozit malzemelerin mekanik ve alev geciktirici özellikleri içerdikleri cam elyaf miktarı ve mineralin mikro-nano boyut dağılımına göre incelenmiştir. Kompozit numuneler cam elyafları ve huntit / hidromanyezit minerallerinin poli vinil klorür (PVC) matrise farklı oranlarda eklenmesi ile hazırlanmıştır. Alev geciktirici özelliği, sınırlayıcı oksijen indeksi (LOI) testi ile incelenmiştir. Bu çalışmanın ana amacı olarak cam elyaf katkıların mekanik özelliklere etkileri incelenmiştir. Sonuç olarak cam elyafın kompozitlerin mekanik özelliklerini iyileştirdiği gözlemlenmiştir. %30 cam elyaf katkısı ile çekme mukavemeti 38,4 MPa'dan 65,8 MPa'a çıkmıştır.

show abstract

“…As a result of this action the amount of oxygen, which is able to enter into the flame, is restricted due to the release of water and this avoids the critical fuel/oxygen ratio [14]. Moreover, after degradation, a ceramic: based protective layer was created and this improves insulation giving rise to a smoke-suppressant effect [15]. During combustion, this ceramic-based protective layer plays an important role for the efficient protection of the polymer compound and decreasing the heat release [14].…”

Section: Introductionmentioning

confidence: 99%

“…Regarding the flame retardancy properties, it was obtained that increasing the loading level of additive [15] and decreasing the size increase the flame retardancy of the polymer composite [18]. This was explained with the fact of increasing surface area.…”

Section: Introductionmentioning

confidence: 99%

Electrical Behaviors of Flame Retardant Huntite and Hydromagnesite Reinforced Polymer Composites

Atay

Çelik

2012

ISRN Polymer Science

View full text Add to dashboard Cite

In our previous work, we studied the physical characteristics (particle size, surface treatment, etc.) of huntite/hydromagnesite mineral in order to be employed as a flame retardant filler. With this respect, electrical properties of the mineral reinforced polymeric composites were investigated in this study. After grinding of huntite/hydromagnesite mineral to the particle size of 10 μm, 1 μm, and 0.1 μm, phase and microstructural analyses were undertaken using X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS). The ground minerals with different particle size and content levels were subsequently added to ethylene vinyl acetate copolymer (EVA) to produce composite materials. After fabrication of huntite/hydromagnesite reinforced plastic composite samples, they were characterized by using Fourier transform infrared (FTIR) and SEM-EDS. Electrical properties were measured as a main objective of this paper with Alpha-N high resolution dielectric analyzer as a function of particle size and loading level. Dielectric constant, dissipation factor, specific resistance, and conductivity of the composite materials were measured as a function of frequency. On the other hand, conductivity of Ag-coated and uncoated polymeric composite materials was measured. It was concluded that the electrical properties of plastic composites were improved with reducing the mineral particle size.

show abstract

Characterization of poly(ethylene-co-vinyl acetate) (EVA) filled with low grade magnesium hydroxide

Cited by 46 publications

References 4 publications

An experimental and numerical model for the release of acetone from decomposing EVA containing aluminium, magnesium or calcium hydroxide fire retardants

An experimental and numerical model for the release of acetone from decomposing EVA containing aluminium, magnesium or calcium hydroxide fire retardants

Mi̇neral Takvi̇yeli̇ Kablo Tavalarinin Mekani̇k Özelli̇kleri̇ni̇ İyi̇leşti̇rmek İçi̇n Cam Elyaflarin Kullanilmasi

Electrical Behaviors of Flame Retardant Huntite and Hydromagnesite Reinforced Polymer Composites

Contact Info

Product

Resources

About