Mechanical, Thermal and Fire Retardant Characteristics of NR/PP/ATH Thermoplastic Vulcanizates

Lopattananon, Natinee; Walong, Alif; KAESAMAN, Azizon; Sakai, Tadamoto

doi:10.48048/wjst.2019.4436

Cited by 2 publications

(3 citation statements)

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“…The decrease in elongation at break might be due to a decrease in ductility associated with the incorporation of an excess of metal oxide fillers into the polymer matrix. Such decreasing tensile strength and elongation at break with high load filler was also reported by Datta et al (2016), Yuhaida et al (2016), Onuoha et al (2017), Poltabtim et al (2018), andLopattananon et al (2019).…”

Section: Tensile Properties Before and After Agingsupporting

confidence: 72%

High-density thermoplastic vulcanizates based on LLDPE/NR for truck ﬂoor mats application

Nurhajati¹,

Lestari²

2021

MKKP

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The use of thermoplastic vulcanizates (TPVs) that was obtained from a blend of thermoplastics and natural rubbers are considered suitable for the automotive application. To modify the performance of TPVs to high-density TPVs, a high-density filler such as bismuth oxide (Bi 2 O 3 ) was added. The focus of this study was on the development of high-density TPVs based on linear low-density polyethylene (LLDPE)/natural rubber (NR) blend with different proportions of Bi 2 O 3 filler that meets with requirements for truck floor mats material. The high-density TPVs were prepared by melt blending in a kneader. Bismuth oxide filler loading was varied by 50, 150, 200, 250 phr, and 300 phr. An increase in the weight load of bismuth oxide in TPVs increases density, hardness, and volume loss but reduces the tensile properties, tear strength, and burning rate of high-density TPVs. The test results showed that the TPVs containing 250 phr Bi₂O₃ was a promising candidate for use as a truck floor base.

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Section: Tensile Properties Before and After Agingsupporting

confidence: 72%

High-density thermoplastic vulcanizates based on LLDPE/NR for truck ﬂoor mats application

Nurhajati¹,

Lestari²

2021

MKKP

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“…The first step registered at about 186–305°C was related to simultaneous decomposition of paraffinic oil and deacetylation of EVA. 7,32,33 The second step was in a range of 302–433°C, corresponding to NR degradation upon heating. 7,33 The third step was at 425–520°C due to thermal decomposition of polyethylene (PE) chain after elimination of acetic acid from EVA.…”

Section: Resultsmentioning

confidence: 99%

“…7,32,33 The second step was in a range of 302–433°C, corresponding to NR degradation upon heating. 7,33 The third step was at 425–520°C due to thermal decomposition of polyethylene (PE) chain after elimination of acetic acid from EVA. 7,32,34 The data in Table 3 showed that the onset decomposition temperature (T d5 ) , maximum decomposition temperature of paraffinic oil/deacetylation of EVA (T dmax1 ), NR (T dmax2 ), EVA (T dmax3 ) and residual weight of prepared EVA/NR blend nanocomposite foams without SiO 2 through DM approach were closed to those of PSM method.…”

Section: Resultsmentioning

confidence: 99%

Influence of silicon dioxide addition and processing methods on structure, thermal stability and flame retardancy of EVA/NR blend nanocomposite foams

Walong

Thongnuanchan

Sakai

et al. 2020

Progress in Rubber, Plastics and Recycling Technology

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Rubber nanocomposite foams based on 60/40 ethylene vinyl acetate (EVA)/natural rubber (NR) were melt-mixed with flame retardant silicon dioxide (SiO2) (20 parts per hundred rubber, phr), and foamed by compression molding process. In this study, the effect of mixing phenomena of SiO2 through two different compounding techniques such as direct mixing (DM) and phase selective mixing (PSM) methods on structure, thermal stability, combustility and flame retardancy of EVA/NR blend nanocomposite foams were investigated. DM method is a melt mixing of EVA, NR, layered silicate and SiO2, followed by foaming. PSM is a new method based on pre-mixing EVA with SiO2, then melt mixing of EVA/SiO2 masterbatch with NR and layered silicate, and finally foaming. Based on TEM technique, it was found that the SiO2 was exclusively located in dispersed NR phase for the sample prepared by DM method, and the SiO2 was preferably dispersed in continuous EVA matrix when PSM method was employed. However, the different mixing methods did not significantly alter their cellular structures. The thermal stability and char residue content of foamed samples with SiO2 increased obviously when compared with those of corresponding foams without SiO2. The results based on limiting oxygen index (LOI) test and oxygen bomb calorimetry indicated that the foams combined with SiO2 had better combustion resistance and flame retardancy due to barrier effect of thermally stable silicon-based char layer. Further, the SiO2 filled foamed system obtained from the PSM method showed a higher degree of improvement in thermal stability, combustion resistance and flame retardancy than that of DM method because the homogeneous dispersion of SiO2 in EVA matrix rather than the selective dispersion in NR phase. This resulted in the continuity of flame retardant EVA/SiO2 phase in the 60/40 EVA/NR nanocomposite foams, which exerted more efficient fire barrier of the silicon-based char layer.

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Mechanical, Thermal and Fire Retardant Characteristics of NR/PP/ATH Thermoplastic Vulcanizates

Cited by 2 publications

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High-density thermoplastic vulcanizates based on LLDPE/NR for truck ﬂoor mats application

High-density thermoplastic vulcanizates based on LLDPE/NR for truck ﬂoor mats application

Influence of silicon dioxide addition and processing methods on structure, thermal stability and flame retardancy of EVA/NR blend nanocomposite foams

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