Thermal properties of diene elastomers

Rybiński, Przemysław; Kucharska-Jastrząbek, Agnieszka; Janowska, G.

doi:10.1134/s1560090414040095

Cited by 11 publications

(6 citation statements)

References 27 publications

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“…The thermal decomposition of a polymer is an endothermic process, which always requires some initial external energy. The amount of energy necessary to initiate the process of thermal decomposition and combustion must be greater than the energy of the covalent carbon-carbon bond in the main chain (in most polymers, the C-C bond energy is in the range of 200 to 400 kJ/mol) [ 5 , 6 ]. The process of thermal degradation of the polymer (chain scission) is determined by the following factors: the presence of oxygen atoms in the main chain, impurities (e.g., catalyst residues), chemical defects in the chain, and the presence of so-called weak bonds, especially at the end of the chain.…”

Section: Introductionmentioning

confidence: 99%

Effects of Basalt and Carbon Fillers on Fire Hazard, Thermal, and Mechanical Properties of EPDM Rubber Composites

et al. 2021

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Due to growing restrictions on the use of halogenated flame retardant compounds, there is great research interest in the development of fillers that do not emit toxic compounds during thermal decomposition. Polymeric composite materials with reduced flammability are increasingly in demand. Here, we demonstrate that unmodified graphene and carbon nanotubes as well as basalt fibers or flakes can act as effective flame retardants in polymer composites. We also investigate the effects of mixtures of these carbon and mineral fillers on the thermal, mechanical, and rheological properties of EPDM rubber composites. The thermal properties of the EPDM vulcanizates were analyzed using the thermogravimetric method. Flammability was determined by pyrolysis combustion flow calorimetry (PCFC) and cone calorimetry.

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Section: Introductionmentioning

confidence: 99%

Effects of Basalt and Carbon Fillers on Fire Hazard, Thermal, and Mechanical Properties of EPDM Rubber Composites

et al. 2021

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“…TOPANOL OC has a boiling temperature of 172°C so at higher temperatures it is volatilized and cannot stabilize the composites at thermal degradation. In the range 150-350°C the weight losses of SBS blockcopolymers and their composites are lower, under 3%, because the polybutadiene chains in the first degradation step are randomly cleaving and the formed macro-radicals are stabilized by cyclization and crosslinking [27][28][29][30]. The weight loss in the range of 350-390°C are still small, of about 5%, and are due to polystyrene degradation by randomly cleavage in the first stage and then by depolymerization [27,31].…”

Section: Resultsmentioning

confidence: 99%

Styrene-diene Block-copolymers Reinforced with Polystyrene

Ghioca¹,

Grigorescu²,

Iancu³

et al. 2018

Mat.Plast.

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“…Vulcanizates were also studied in an inert atmosphere using a Netzsch DSC-204 differential scanning calorimetry with approximately 5 mg samples at a cooling and heating rate of 108C/min from 208C to 21508C and 21508C to 5008C, respectively. 14,15 Flammability Tests. Oxygen index and combustibility in air methods.…”

Section: Methodsmentioning

confidence: 99%

Effect of hybrid filler (HNTs‐phthalocyanine) on the thermal properties and flammability of diene rubber

Rybiński

Pająk

Janowska

et al. 2015

J of Applied Polymer Sci

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Rubber is an essential polymer widely used in the auto-industry. We report a method for the synthesis of zinc phtalocyanine (ZP), chloroalumino phthalocyanine (CP), and their hybrid fillers obtained by the synthesis of the two phtalocyanines in the presence of halloysite nanotubes (HNTs). The hybrid fillers were characterized by means of microscopic, thermal, and particle size measurement analysis. The effect of these fillers on the properties of diene rubbers were assessed in comparison with a physical mixture of halloysite and ZP or CP pigment. The dispersion degree of hybrid fillers inside an elastomeric matrix (rubber) was assessed with the atomic force microscopy. The influence of the hybrid fillers on the thermal and mechanical properties and flammability of butadiene-acrylonitrile (NBR) and butadiene-styrene (SBR) rubbers was assessed by analyzing the measurement results obtained by means of thermogravimetric analysis, differential scanning calorimetry, Zwick Tensile testing, FAA micro-calorimeter, and oxygen index determination. We found that regardless of the spatial network structure of NBR and SBR rubbers, the incorporation of hybrid fillers into the matrix of the elastomers showed an improvement in their thermal and mechanical properties as well as a significant reduction in flammability. The improvement is attributed to the smaller size and much better dispersion of HZ and HC in relation to the particles of phthalocyanine. The colored composites of NBR rubber, containing hybrid filler (HZ or HC), showed an increase in the heat capacity compared to the uncolored samples, which can increase safety by facilitating the processes of self-extinguishing.

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Thermal properties of diene elastomers

Cited by 11 publications

References 27 publications

Effects of Basalt and Carbon Fillers on Fire Hazard, Thermal, and Mechanical Properties of EPDM Rubber Composites

Effects of Basalt and Carbon Fillers on Fire Hazard, Thermal, and Mechanical Properties of EPDM Rubber Composites

Styrene-diene Block-copolymers Reinforced with Polystyrene

Effect of hybrid filler (HNTs‐phthalocyanine) on the thermal properties and flammability of diene rubber

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