Mechanical properties of blends of EPDM with NR-cellulose II system

Costa, Valéria Gonçalves; Nunes, Regina C. R.

doi:10.1016/0014-3057(94)90193-7

Cited by 22 publications

(7 citation statements)

References 4 publications

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“…However, ethylene propylene diene monomer (EPDM) rubber has saturated hydrocarbon backbones, which impart usually good weathering oxidation and chemical resistance. The blending of EPDM with NR and other diene rubbers has given rise to compounds with good ozone and chemical resistance and reduced compression set . Vulcanized NR/EPDM blend systems have been extensively studied because of their superior performance in tire application like sidewall, as well as a significant improvement in heat and ozone resistance .…”

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical, and rheological properties of natural rubber/ethylene propylene diene monomer nanocomposites reinforced by multi‐wall carbon nanotubes

2016

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Nanocomposites based on natural rubber (NR)/ethylene propylene diene monomer (EPDM)/multi‐wall carbon nanotubes (MWCNT) have been prepared in an internal and a two roll‐mill mixer in two steps. The effect of carbon nanotubes (MWCNTs) and rubber composition were studied on microstructure, mechanical and rheological properties of the vulcanizated NR/EPDM/MWCNT nanocomposites. Ethylene propylene diene monomer grafted with maleic anhydride (EPDM‐g‐MAH) was prepared using a solution process. Grafting of maleic anhydride on EPDM confirmed by attenuated total reflection Fourier transform infrared spectroscopy (ATR‐FTIR). The effects of compatibilizer (EPDM‐g‐MAH) and functionalized carbon nanotubes (f‐MWCNTs) on mechanical properties of NR/EPDM/MWCNT nanocomposites was investigated as well. Dynamic mechanical thermal analysis (DMTA) results demonstrated the glass transition temperature (Tg) of nanocomposites were slowly enhanced with increasing the amount of MWCNTs. The microstructure of nanocomposites have been characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), which showed that the observed MWCNTs were in both NR and EPDM phases. The rheological behavior has been evaluated by a rubber processing analyzer (RPA). The ozone resistance times of the nanocomposite samples indicated that by increasing the amount of MWCNTs ozone resistance was improved. POLYM. COMPOS., 39:E745–E753, 2018. © 2016 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical, and rheological properties of natural rubber/ethylene propylene diene monomer nanocomposites reinforced by multi‐wall carbon nanotubes

2016

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“…Most of the blend like NR/EPDM, NR/NBR, NR/SBR, NR/EVA, SBR/NBR [4], NBR/EVA [1], NBR/HNBR [2] and NR/CR were incompatible and need to be improved accordingly to suit their specific targeted applications. For the past few years, many researchers have employed natural rubber (NR) and ethylene-propylene-diene-monomer EPDM synthetic rubber for the preparation of elastomeric blends [5][6][7][8][9][10][11][12][13][14]. Vulcanized NR/EPDM blend systems have been extensively studied because of their superior performance in tire application, as well as significant improvement in heat and ozone resistance [9].…”

Section: Introductionmentioning

confidence: 99%

NR/EPDM elastomeric rubber blend miscibility evaluation by two-level fractional factorial design of experiment

Razak

Ahmad²,

Ratnam

et al. 2014

AIP Conference Proceedings

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Abstract. Fractional 25 two-level factorial design of experiment (DOE) was applied to systematically prepare the NR/EPDM blend using Haake internal mixer set-up. The process model of rubber blend preparation that correlates the relationships between the mixer process input parameters and the output response of blend compatibility was developed. Model analysis of variance (ANOVA) and model fitting through curve evaluation finalized the R 2 of 99.60% with proposed parametric combination of A = 30/70 NR/EPDM blend ratio; B = 70°C mixing temperature; C = 70 rpm of rotor speed; D = 5 minutes of mixing period and E = 1.30 phr EPDM-g-MAH compatibilizer addition, with overall 0.966 desirability. Model validation with small deviation at +2.09% confirmed the repeatability of the mixing strategy with valid maximum tensile strength output representing the blend miscibility. Theoretical calculation of NR/EPDM blend compatibility is also included and compared. In short, this study provides a brief insight on the utilization of DOE for experimental simplification and parameter inter-correlation studies, especially when dealing with multiple variables during elastomeric rubber blend preparation.

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“…6 Natural rubber (NR) is the adequate choice when good tensile and tear strengths are demanded, since these characteristics can be developed owing to the capability of this rubber to crystallize under stress. [7][8][9][10][11] Polybutadiene rubber (BR) is characterized by its superior abrasion resistance, so that blends of NR and BR that combine the excellent processing and physical properties of the former with the superior abrasion resistance of the latter are largely used in the tire industry for the production of treads and also in conveyor belt cover compound. [12][13][14][15] However, the rubber performance is determined not only by the right choice of the formulation components but also by such design factors as constituent patterns and fabrication process parameters.…”

Section: Introductionmentioning

confidence: 99%

Improvement of polymer blend properties by changing sequence of mixing

Maji

Bhattacharyya

Dasgupta

et al. 2007

J of Applied Polymer Sci

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The basic objective of this article is to improve the polymer blend properties by changing mixing sequence. Blending of two elastomers does not lead to a molecularly homogeneous blend (true solution), but to a heterogeneous system in which both polymer phases are present. In this article, the detailed study of heterogeneous distribution of carbon black as well as blend inhomogenity and the physicomechanical including dynamic mechanical properties of the blend has been carried out. The choice of the blend was natural rubber/polybutadiene rubber as 85:15. Heterogeneous carbon black distribution study was also performed in differential scanning calorimeter.

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Mechanical properties of blends of EPDM with NR-cellulose II system

Cited by 22 publications

References 4 publications

Microstructure, mechanical, and rheological properties of natural rubber/ethylene propylene diene monomer nanocomposites reinforced by multi‐wall carbon nanotubes

Microstructure, mechanical, and rheological properties of natural rubber/ethylene propylene diene monomer nanocomposites reinforced by multi‐wall carbon nanotubes

NR/EPDM elastomeric rubber blend miscibility evaluation by two-level fractional factorial design of experiment

Improvement of polymer blend properties by changing sequence of mixing

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