Effect of Phase Separation on Thermal Aging Behavior of Styrene–Butadiene Rubber Vulcanizates Using Liquid Polyisoprene as Plasticizer

Nakazono, Takeo; Ozaki, Anri; Matsumoto, Akikazu

doi:10.1246/cl.2010.268

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…Liquid polyisoprene rubber (LIR) can be used as a plasticizer instead of volatile process oil in SBR . Process oils will slowly evaporate during the thermal aging, leading to the hardening and changing in mechanical properties of rubber vulcanizates.…”

Section: Introductionmentioning

confidence: 99%

Effects of liquid polyisoprene and magnesium oxide on the mechanical properties of styrene‐butadiene rubber/carbon nanotubes composite

Wang

Zhang

2016

Polymer Composites

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Effects of liquid polyisoprene (LIR) and magnesium oxide (MgO) on the mechanical properties of styrene‐butadiene rubber/carbon nanotubes (SBR/CNT) composite were studied. After LIR was added into SBR/CNT compound, the curing rate and torque decreased, and the Payne effect became less pronounced. The presence of LIR in SBR/CNT vulcanizate could increase the elongation at break, decrease the moduli at given extensions, the stress relaxation factor, and the degree of the stress softening effect. The presence of LIR and MgO in SBR/CNT could increase the moduli at given extensions and the degree of the stress softening effect. CNT could be well dispersed in SBR/CNT/LIR/MgO composite. The Raman characteristic peaks of CNT shifted to low wavenumber with the addition of LIR and MgO into SBR/CNT. LIR and MgO affected the dynamical mechanical properties of SBR/CNT vulcanizate, increasing the elastic modulus, glass transition temperature, and tan δ value at 0°C. POLYM. COMPOS., 39:E765–E771, 2018. © 2016 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Effects of liquid polyisoprene and magnesium oxide on the mechanical properties of styrene‐butadiene rubber/carbon nanotubes composite

Wang

Zhang

2016

Polymer Composites

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Phase separation and thermal aging behavior of styrene‐butadiene rubber vulcanizates using liquid polymers as plasticizers studied by differential scanning calorimetry and dynamic mechanical spectroscopy

Nakazono

Ozaki

Matsumoto

2010

J of Applied Polymer Sci

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Styrene-butadiene rubber (SBR) vulcanizates were prepared using plasticizers including the four liquid types of styrene-butadiene copolymers (LPSB), polybutadiene (LPB), polyisoprene (LPI), and the hydrogenated polyisoprene (LHPI) as well as the conventional process oil, and their phase-separated structures and mechanical properties were investigated by differential scanning calorimetry and dynamic mechanical spectroscopy. The phase separation was observed for the SBR vulcanizates when LPI and LHPI were used as the plasticizers, while the LPSB and LPB gave homogeneous structures because of the good miscibility with the SBR. The phase-separated structure of the SBR vulcanizate prepared using LPI changed to the homogeneous during the thermal aging. We revealed the role of the liquid polymers as the plasticizers in maintaining the physical and mechanical properties of the SBR vulcanizates during the thermal aging process when the plasticizers were miscible to the SBR. V C 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120: [434][435][436][437][438][439][440] 2011

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Synthesis of Liquid Polyisoprene with High cis-1,4 Unit Content and Narrow Molecular Weight Distribution Using Neodymium Phosphate Catalyst

et al. 2019

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The polymerization of isoprene (Ip) initiated by a ternary catalytic system consisting of liquid Nd(P204)3 (Nd), Al(i-Bu)2H (Al), and CHCl3 (Cl) in cyclohexane was examined. The effects of order of addition and amount of Ip, Al, and Cl in the catalyst on the polymerization were evaluated. The molecular weight (Mn), molecular weight distribution (Mw/Mn), and microstructure of the polymer were characterized using size exclusion chromatography and multiangle light scattering, FT-IR, 1H NMR and 13C NMR analysis. The results indicate that the order of addition, i.e. Nd+Ip+Al+Cl and ratios of [Ip]/[Nd]=30, [Al]/[Nd]=20, and [Cl]/[Nd]=3 were essential for the optimized ternary catalyst system Nd(P204)3/Al(i-Bu)2H/CHCl3. The resulting liquid polyisoprene (LIR) has a high cis-1,4 unit content (>98%) and a narrow molecular weight distribution (Mw/Mn<1.2). The molecular weight of the polymer was precisely controlled.

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Effect of Phase Separation on Thermal Aging Behavior of Styrene–Butadiene Rubber Vulcanizates Using Liquid Polyisoprene as Plasticizer

Cited by 4 publications

References 12 publications

Effects of liquid polyisoprene and magnesium oxide on the mechanical properties of styrene‐butadiene rubber/carbon nanotubes composite

Effects of liquid polyisoprene and magnesium oxide on the mechanical properties of styrene‐butadiene rubber/carbon nanotubes composite

Phase separation and thermal aging behavior of styrene‐butadiene rubber vulcanizates using liquid polymers as plasticizers studied by differential scanning calorimetry and dynamic mechanical spectroscopy

Synthesis of Liquid Polyisoprene with High cis-1,4 Unit Content and Narrow Molecular Weight Distribution Using Neodymium Phosphate Catalyst

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