Study on the Aging Behavior of Natural Rubber/Butadiene Rubber (NR/BR) Blends Using a Parallel Spring Model

Moon, Byungwoo; Lee, Jongmin; Park, Soo Hyung; Seok, Chang-Sung

doi:10.3390/polym10060658

Cited by 46 publications

(40 citation statements)

References 29 publications

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“…These authors also verified that the emulsion-polymerized ABS showed better thermal stability, and associated these results with the presence of a cross-linked network in the PB fraction, which is expected to promote a reduction in the free volume and oxygen diffusion [22,23]. Such PB crosslinking also occurs during aging and processing forming gels; however, the addition of AOs can improve the stability, reducing crosslinking [14,24].…”

Section: Introductionmentioning

confidence: 86%

A Statistical Analysis on the Effect of Antioxidants on the Thermal-Oxidative Stability of Commercial Mass- and Emulsion-Polymerized ABS

et al. 2018

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In the present work, statistical analysis (16 processing conditions and 2 virgin unmodified samples) is performed to study the influence of antioxidants (AOs) during acrylonitrile-butadiene-styrene terpolymer (ABS) melt-blending (220 °C) on the degradation of the polybutadiene (PB) rich phase, the oxidation onset temperature (OOT), the oxidation peak temperature (OP), and the yellowing index (YI). Predictive equations are constructed, with a focus on three commercial AOs (two primary: Irganox 1076 and 245; and one secondary: Irgafos 168) and two commercial ABS types (mass- and emulsion-polymerized). Fourier transform infrared spectroscopy (FTIR) results indicate that the nitrile absorption peak at 2237 cm−1 is recommended as reference peak to identify chemical changes in the PB content. The melt processing of unmodified ABSs promotes a reduction in OOT and OP, and promotes an increase in the YI. ABS obtained by mass polymerization shows a higher thermal-oxidative stability. The addition of a primary AO increases the thermal-oxidative stability, whereas the secondary AO only increases OP. The addition of the two primary AOs has a synergetic effect resulting in higher OOT and OP values. Statistical analysis shows that OP data are influenced by all three AO types, but 0.2 m% of Irganox 1076 displays high potential in an industrial context.

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Section: Introductionmentioning

confidence: 86%

A Statistical Analysis on the Effect of Antioxidants on the Thermal-Oxidative Stability of Commercial Mass- and Emulsion-Polymerized ABS

et al. 2018

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“…For composites with one matrix system, only the calculated interaction parameter (χ 1 ) of that matrix is used in the estimation of its crosslinking density (N) [28,29]. Researchers have adopted the use of the mixtures rule [30] for blend systems or a method of averaging χ 1 for each the polymer involved to compute the N of composites with many matrix phases [18,20,31]. In this present study, we also adopted the latter method of averaging χ 1 for the blend systems, for the computation of their respective N values.…”

Section: Crosslinking Density the Degree Of Swelling Of Polymer Compmentioning

confidence: 99%

Preparation and Characterization of Rubber Blends for Industrial Tire Tread Fabrication

Mensah

Agyei‐Tuffour

Nyankson

et al. 2018

International Journal of Polymer Science

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The physico-mechanical properties of variable rubber blends including epoxide natural rubber (ENR), polybutadiene rubber (BR), and solution polymerized styrene-butadiene rubber (SBR) filled with silanized silica and carbon black mixtures were explored. The tensile, hardness, resilience, abrasion, and fatigue behavior were investigated. An optimized composition involving 30 phr of ENR and 70 phr SBR filled with mixtures of carbon blacks and silanized silica was proposed to be a suitable composition for the future development of green passenger truck tires, with low rolling resistance (fuel saving ability), high wear resistance, and desired fatigue failure properties.

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“…where β 1 is the lattice constant, usually 0.34, δ r is the solubility parameter of NR (8.12 [cal/cm 3 ] 1/2 ), and δ s is the solubility parameter of toluene (8.97 [cal/cm 3 ] 1/2 ). [32][33][34] The tensile properties of DNR and WNR compounds were determined from their strain-stress curves recorded using a universal tensile tester (Daekyung Co., DUT-500C) at ambient temperature with a crosshead speed of 500 mm/min according to ASTM D 412. Four dumbbelltype samples were used for each measurement.…”

Section: Evaluation Of Dnr and Wnr Compoundsmentioning

confidence: 99%

Silica‐filled NR compounds prepared by dry and wet masterbatches with different mixing times

Ryu¹,

Yang²,

Park³

et al. 2020

J of Applied Polymer Sci

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Silica‐filled NR compounds are prepared by mixing rubber with organic‐networked silica and additives such as curatives, processing and coupling agents, and stabilizer in a dried state (dry‐mixed NR, DNR) and mixing a silica‐NR wet masterbatch prepared in liquid phase with the additives (wet‐mixed NR, WNR). The effects of mixing method and time of DNR and WNR compounds on their cure, process, tensile, and dynamic properties are investigated. The mixing of DNR crushes silica aggregates to smaller ones, but also forms occasionally large ones, while the mixing of WNR produces small aggregates without forming larger ones because silica aggregates are already covered with rubber. The high silica dispersion, suppressed silica aggregation, low Payne effect, and low‐loss modulus of the WNR compounds prepared by mixing for a sufficient time result in their low viscosity, high scorch safety, and low rolling resistance without sacrificing other rubber properties.

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Study on the Aging Behavior of Natural Rubber/Butadiene Rubber (NR/BR) Blends Using a Parallel Spring Model

Cited by 46 publications

References 29 publications

A Statistical Analysis on the Effect of Antioxidants on the Thermal-Oxidative Stability of Commercial Mass- and Emulsion-Polymerized ABS

A Statistical Analysis on the Effect of Antioxidants on the Thermal-Oxidative Stability of Commercial Mass- and Emulsion-Polymerized ABS

Preparation and Characterization of Rubber Blends for Industrial Tire Tread Fabrication

Silica‐filled NR compounds prepared by dry and wet masterbatches with different mixing times

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