HNBR/EPDM blends: Covulcanization and compatibility

Shi, Xinyan; Zhu, Zhu; Jia, Lingyan; Li, Qi; Bi, Weina

doi:10.1002/app.39014

Cited by 15 publications

(15 citation statements)

References 8 publications

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“…As expected, the virgin HNBR specimen shows a peak in tan d at approximately À16 C, which is associated with glass transition temperature. This is in the range of other values reported in literature for similar HNBR compounds [1,22,27,28]. The magnitude of the tan d peak is seen to decrease with increasing exposure time, although the temperature of this transition is similar in specimens 160 C e 3W and 160 C e 6W.…”

Section: Tensile Testingsupporting

confidence: 78%

The mechanical properties of a model hydrogenated nitrile butadiene rubber (HNBR) following simulated sweet oil exposure at elevated temperature and pressure

Alcock

Jørgensen

2015

Polymer Testing

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a b s t r a c tA typical carbon black reinforced hydrogenated nitrile butadiene rubber (HNBR) was exposed to a mix of hydrocarbons (toluene, heptane and cyclohexane) at elevated temperatures and pressure in order to chemically age the material. The effect of this exposure on the mechanical properties is reported; the most significant change is a dramatic increase in tensile stiffness for specimens exposed at 160 C for 12 weeks. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) revealed changes in the glass transition behaviour of this material, with a general reduction in the magnitude of the glass transition with increasing ageing time. In addition, gravimetric studies of the swollen specimens after removal from the hydrocarbon mix showed that the more aged specimens underwent significantly slower drying rates compared to less aged specimens. These results may be explained by an increase in crosslink density in the materials being the main mechanism occurring during chemical ageing of these HNBR compounds.

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Section: Tensile Testingsupporting

confidence: 78%

The mechanical properties of a model hydrogenated nitrile butadiene rubber (HNBR) following simulated sweet oil exposure at elevated temperature and pressure

Alcock

Jørgensen

2015

Polymer Testing

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“…Table also shows that tensile strength and elongation at break of NBR before oil immersion increased with increasing HNBR content. This was expected because adding low‐double bond and flexible HNBR into NBR was likely to obtain the rubber blends with higher tensile strength and elongation . It should also be noted that the changes in tensile strength in Table may not be necessarily proportional to those in the crosslink density (delta torque in Table ).…”

Section: Resultsmentioning

confidence: 99%

Swelling and mechanical properties of (acrylonitrile‐butadiene rubber)/(hydrogenated acrylonitrile‐butadiene rubber) blends with precipitated silica filled in gasohol fuels

Promchim

Kanking

Niltui

et al. 2014

Vinyl Additive Technology

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This work studied the effects of hydrogenated acrylonitrile-butadiene rubber (HNBR) and precipitated silica (PSi) loadings in acrylonitrile-butadiene rubber (NBR) filled with 60 parts per hundred of rubber (phr) of carbon black (CB) for oil-resistant seal applications in contact with gasohol fuel. The cure characteristics, mechanical properties, and swelling behavior of HNBR/NBR blends reinforced with PSi before and after immersion in ethanol-based oils (E10, E20, and E85) were then monitored. This work studied the effects of PSi loading in rubber compounds on the mechanical properties of the rubber blends. The results suggested that the scorch time of CB-filled NBR/HNBR was not affected by HNBR loading, but the cure time, Mooney viscosity, and torque difference increased with HNBR content. The swelling of the blends in E85 oil were relatively low compared with those in E10 and E20 oils. The recommended NBR/HNBR blend ratio for oilresistant applications was 50/50. Tensile strength and elongation at break before and after immersion in gasohol oils increased with HNBR loading, and the opposite effect was found for tensile modulus and hardness. PSi filler had no effect on scorch time, but decreased the cure time of the blends. The swelling level of the blends slightly decreased with increasing PSi content. The recommended silica content for optimum reinforcement for black-filled NBR/HNBR blend at 50/50 was 30 phr. The results in this work suggested that NBR/HNBR blends reinforced with 60 phr of CB and 30 phr of silica could be potentially used for rubber seals in contact with gasohol fuels. J. VINYL ADDIT. TECHNOL.,

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“…25,26 Therefore, the polyelectrolyte walls would gradually loose and collapse to facilitate the rapid release of DOX. [35][36][37] It should also be noted that the total released DOX amount were relatively low for all studied pH conditions. The possible reason to this phenomenon is that the AuNPs inside the microcapsule shell probably increase the strength of the microcapsules, which results in the relatively lower drug release rate.…”

Section: Ph-/thermal-sensitive Releasementioning

confidence: 99%

Hollow PUA/PSS/Au microcapsules with interdependent near‐infrared/pH/temperature multiresponsiveness

Shi

Liu

et al. 2015

J of Applied Polymer Sci

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In this work, smart hollow microcapsules made of thermal-/pH-dual sensitive aliphatic poly(urethane-amine) (PUA), sodium poly(styrenesulfonate) (PSS), and Au nanoparticles (AuNPs) for interdependent multi-responsive drug delivery have been constructed by layer-by-layer (LbL) technique. The electrostatic interactions among PUA, PSS, and AuNPs contribute to the successful self-assembly of hollow multilayer microcapsules. Thanks to the shrinkage of PUA above its lower critical solution temperature (LCST) and the interaction variation between PUA and PSS at different pH conditions, hollow microcapsules exhibit distinct pHand thermal-sensitive properties. Moreover, AuNPs aggregates can effectively convert light to heat upon irradiation with near-infrared (NIR) laser and endow the hollow microcapsules with distinct NIR-responsiveness. More importantly, the NIR-responsive study also demonstrates that the microcapsule morphology and the corresponding NIR-responsive drug release are strongly dependent on the pH value and temperature of the media. The results indicate that the prepared hollow PUA/PSS/Au microcapsules have the great potential to be used as a novel smart drug carrier for the remotely controllable drug delivery. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym.Sci. 2016, 133, 43008.

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HNBR/EPDM blends: Covulcanization and compatibility

Cited by 15 publications

References 8 publications

The mechanical properties of a model hydrogenated nitrile butadiene rubber (HNBR) following simulated sweet oil exposure at elevated temperature and pressure

The mechanical properties of a model hydrogenated nitrile butadiene rubber (HNBR) following simulated sweet oil exposure at elevated temperature and pressure

Swelling and mechanical properties of (acrylonitrile‐butadiene rubber)/(hydrogenated acrylonitrile‐butadiene rubber) blends with precipitated silica filled in gasohol fuels

Hollow PUA/PSS/Au microcapsules with interdependent near‐infrared/pH/temperature multiresponsiveness

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