Study on the combustion behavior of high impact polystyrene nanocomposites produced by different extrusion processes

Sánchez-Olivares, Guadalupe; Sanchez-Solis, A.; Camino, Giovanni; Manero, Ο.

doi:10.3144/expresspolymlett.2008.69

Cited by 22 publications

(23 citation statements)

References 27 publications

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“…This so-called 'barrier model' may work well for char-forming polymers. [16][17][18] The interaction of polymer matrix with filler can also be estimated by the amount of char residue also. With increase in the filler amount the residue should increase regularly.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Studies of Different Properties of Polystyrene‐Asphaltene Composites

Siddiqui

2015

Macromolecular Symposia

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Summary: The study of thermal and viscoelastic properties of polystyrene composites with different filler loadings of asphaltenes were carried out. The thermogravimetric analysis revealed that the T 10 for neat polystyrene was around 365 C and it increased to 440 C with an addition of asphaltene (3 wt% loading, St3). Further addition of asphaltene also showed an increase in the T 10 value compared to the neat polystyrene. The second important parameter from TGA analysis can be seen that the neat polystyrene had a degradation maximum (T 50 ) at around 432 C and St3 composite shows the highest T 50 value of 450 C. Differential Scanning calorimetric studies of the composites shows that Tg of polystyrene was around 66 C and St2 composite showed the Tg at the maximum of 69 C, which infers that there was interaction between the filler and the matrix. St3 composite shows higher storage modulus as compared to all others. Addition of asphaltenes improved the storage modulus of polystyrene system due to the compatibility effect, which facilitated better load transfer due to the strengthening of the interphase between the filler and matrix. Loss modulus curves of the polystyrene and composites showed a higher loss modulus than the neat polymer in the whole temperature region. It was concluded that the thermal stability and viscoelastic properties of the polystyrene composites were significantly improved with the addition of asphaltene as filler.

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Section: Thermogravimetric Analysismentioning

confidence: 99%

Studies of Different Properties of Polystyrene‐Asphaltene Composites

Siddiqui

2015

Macromolecular Symposia

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“…The significant enhancement of both tensile and flexural strength in polymer/clay nanocomposites is usually attributed to the delaminated clay formation [12]. The good dispersion of clay produces a substantial improvement in fire performance in polymeric matrices such as polystyrene [10,[13][14][15][16][17][18] at least in terms of peak heat release rate (Peak HRR) accessed by cone calorimeter. The suggested mechanism by which clay nanocomposites reduce the heat release rate involves the formation of a char that serves as a barrier to both mass and energy transport [10].…”

Section: Introductionmentioning

confidence: 99%

Swelling of organoclays in styrene. Effect on flammability in polystyrene nanocomposites

Timochenco¹,

Grassi²,

Pizzol³

et al. 2010

Express Polym. Lett.

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Abstract. In this work the effect of the compatibility between organoclays and styrene on the flammability of polystyrene/clay nanocomposites obtained through in situ incorporation was investigated. The reactions were carried out by bulk polymerization. The compatibility between organoclays and styrene was inferred from swelling of the organoclay in styrene. The nanocomposites were characterized by X-ray diffraction and Transmission Electron Microscopy. The heat release rate was obtained by Cone Calorimeter and the nanocomposites were tested by UL94 horizontal burn test. Results showed that intercalated and partially exfoliated polystyrene/clay nanocomposites were obtained depending on the swelling behavior of the organoclay in styrene. The nanocomposites submitted to UL94 burning test presented a burning rate faster than the virgin polystyrene (PS), however an increase of the decomposition temperature and an accentuated decrease on the peak of heat release of the nanocomposites were also observed compared to virgin PS. These results indicate that PS/clay nanocomposites, either intercalated or partially exfoliated, reduced the flammability approximately by the same extent, although reduced the ignition resistance of the PS.

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“…The distribution and dispersion of flame retardants in a polymer matrix are very important, because they have a significant effect on the performance of the flame retardant [33,34] . SEM images of PS and the PS/TPP composite at their fracture surface are shown in Fig.…”

Section: Dispersion and Distribution Of Tpp In Ps Matrixmentioning

confidence: 99%

Preparation of polystyrene/triphenyl phosphate composites by suspension polymerization and melt extrusion method — A comparative study

Cunwei

Yang

et al. 2016

Chin J Polym Sci

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Polystyrene (PS)/triphenyl phosphate (TPP) composites were prepared by both suspension polymerization and melt extrusion, and a comparative study of the flame retardance and mechanical properties was carried out. The results showed that suspension polymerization was a better technique than melt extrusion for obtaining good dispersity of the PS/TPP composite. The TPP nanoparticles, which were approximately 50 nm in size, were homogenously and uniformly dispersed in the PS matrix by suspension polymerization in one-step. However, the PS/TPP composite was partially agglomerated, exhibiting irregularly shaped micron-scale particles as a result of melt extrusion. In contrast to the melt extrusion, the limited oxygen index (LOI) of the PS/TPP nanocomposite by suspension polymerization increased to 22.6% from 21.8%, and time to ignition (TTI) increased by 12.3%, the peak heat release rate (PHRR) decreased by 8.5%, and the total heat release (THR) decreased by 11.0%. The mechanical properties of the PS/TPP nanocomposite by suspension polymerization also increased. The tensile strength, elongation at break, and flexural strength increased by 36.4%, 8.5%, and 108%, respectively.

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Study on the combustion behavior of high impact polystyrene nanocomposites produced by different extrusion processes

Cited by 22 publications

References 27 publications

Studies of Different Properties of Polystyrene‐Asphaltene Composites

Studies of Different Properties of Polystyrene‐Asphaltene Composites

Swelling of organoclays in styrene. Effect on flammability in polystyrene nanocomposites

Preparation of polystyrene/triphenyl phosphate composites by suspension polymerization and melt extrusion method — A comparative study

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