Morphology and dynamic mechanical properties of natural rubber/nitrile rubber blends containing <i>trans</i>‐polyoctylene rubber as a compatibilizer

Kader, M. Abdul; Kim, WD; Kaang, Shinyoung; Nah, Changwoon

doi:10.1002/pi.1655

Cited by 34 publications

(30 citation statements)

References 18 publications

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“…This is attributed to the distinct principles involved in the DSC and DMA techniques. DSC measures the change in heat capacity as rubber chain evolves from the frozen to unfrozen state, whereas DMA measures the change in mechanical response of this chain [46,47]. Nevertheless, the DT g (difference of individual T g ) remains almost the same for both the techniques.…”

Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 96%

Compatibilization of natural rubber/nitrile rubber blends by sol–gel nano-silica generated by in situ method

Bansod

Kapgate

Das

et al. 2016

J Sol-Gel Sci Technol

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Controlled growth of in situ silica, into natural rubber (NR)/nitrile rubber (NBR) blend (40/60 composition by weight) following solution sol-gel method, results in a coherent blend morphology with enhanced composite properties. Similar composites, i.e., in situ silica-filled NR/ NBR blend (40/60 by weight), showed better mechanical properties than any other composition that were prepared by soaking sol-gel method in earlier study. However, silica content in the rubber blend was limited to 20 phr (parts per hundred parts of rubber) and could not be increased under experimental condition following soaking sol-gel method. In the present work, silica content is increased (up to 30 phr) beyond that limit for the same blend composition. Accordingly, mechanical properties of the NR/NBR composites are improved. Use of a silane coupling agent, viz., bis-(3-triethoxysilylpropyl)-tetra sulfide, in the reactive sol-gel system during in situ silica generation brings in remarkable effect in silica distribution, rubber-filler interaction and mechanical properties of the composites. TEM micrographs of the selected composites reveal that silica is mostly grown at the interfacial region, when silane is used in particular. This results in further enhancement in mechanical properties and compatibility of the blend at the same silica content as evident from stress-strain and dynamic mechanical analysis studies. The reinforcement of effect in situ silica is assessed by Guth-Gold equation and modified form of Guth equation (with shape factor f = 2.53). The results are supported by the detailed studies on rheological, morphological, mechanical and viscoelastic properties of the composites. Graphical AbstractKeywords Rubber blend Á Sol-gel method Á In situ silica Á Rubber-filler interaction Á Silane treatment Á Reinforcement

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Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 96%

Compatibilization of natural rubber/nitrile rubber blends by sol–gel nano-silica generated by in situ method

Bansod

Kapgate

Das

et al. 2016

J Sol-Gel Sci Technol

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“…It was also reported that by blending NBR with NR can give oil resistant compound with good tensile strength . Kadar et al prepared (50/50) NR/NBR blend using trans‐polyoctylene rubber (TOR) as a compatibilizer . They showed that incorporation of TOR in the blend brought changes in the phase morphology by slightly reducing the size of the NBR phase.…”

Section: Introductionmentioning

confidence: 99%

Transport and electrical properties of natural rubber/nitrile rubber blend composites reinforced with multiwalled carbon nanotube and modified nano zinc oxide

Thomas¹,

Thomas

Mathew

et al. 2013

Polymer Composites

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As a surface modified zinc oxide, stearic acid‐coated nano zinc oxide (ZOS) has been prepared by sol‐gel method and was used along with N‐benzylimine aminothioformamide‐N‐cyclohexyl benzthiazyl sulfonamide binary accelerator system, multiwalled carbon nanotube (MWCNT) and sulfur for vulcanizing 20/80 natural rubber/nitrile rubber (NR/NBR) blend. Different formulations have been prepared by using 1–7 phr of MWCNT. Solvent transport and electrical properties of the rubber compounds have been investigated. The equilibrium solvent uptake (Q∞) decreased with increase in concentration of the filler due to the decrease in the free volume and the increase in tortuousity. The conductivities of the vulcanizates increased with increase in the dosage of MWCNT from 1 phr in NBCNT1 to 7 phr in NBCNT4 indicating the formation of percolating network of MWCNTs in the NBR/NR matrix. POLYM. COMPOS., 35:956–963, 2014. © 2013 Society of Plastics Engineers

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“…Their phase boundaries become also more distinct. It is different from the common “sea‐island” mode of immiscible polymer blends [19]. The phase morphology is close to that of part compatibility in IPN polymers [20].…”

Section: Resultsmentioning

confidence: 98%

Fabrication of novel hindered phenol/phenol resin/nitrile butadiene rubber hybrids and their long‐period damping properties

2012

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To overcome the modification shortcoming of phenol resin (PR) in decreasing the loss factor peak (tan δmax) of nitrile butadiene rubber (PR/NBR) blends, the hindered phenol AO‐80/PR/NBR hybrids were successfully prepared. The tan δmax of the hybrids is found to increase with the increment of AO‐80 content while they almost remains the same widths of damping temperature range as PR/NBR blend. Their damping properties can be regulated well by controlling the content of AO‐80. Various experimental data of Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry, and dynamic viscoelastic measurements (DMAs) show that the good damping properties of the hybrids result from the cooperative effect of two different relaxation transitions: the hydrogen bonds of nitrile group associated with hydroxyl group of AO‐80 besides their glass transition. The effect does not decrease the width of damping temperature range of the hybrids but really maintain a high value of tan δmax in a long duration; but it is found that the components of hybrids with the high content of AO‐80 become partly compatible after long‐period storage. So the content of AO‐80 is important to sustain the damping storage stability for NBR hybrids where the amount of AO‐80 below 50 phr is preferred. We believe that our studies provide some basic observations to serve the practical applications of NBR hybrids. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers

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Morphology and dynamic mechanical properties of natural rubber/nitrile rubber blends containing trans‐polyoctylene rubber as a compatibilizer

Cited by 34 publications

References 18 publications

Compatibilization of natural rubber/nitrile rubber blends by sol–gel nano-silica generated by in situ method

Compatibilization of natural rubber/nitrile rubber blends by sol–gel nano-silica generated by in situ method

Transport and electrical properties of natural rubber/nitrile rubber blend composites reinforced with multiwalled carbon nanotube and modified nano zinc oxide

Fabrication of novel hindered phenol/phenol resin/nitrile butadiene rubber hybrids and their long‐period damping properties

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