Dynamic mechanical analysis of binary and ternary polymer blends based on nylon copolymer/EPDM rubber and EPM grafted maleic anhydride compatibilizer

George, K. E.; Komalan, Cibi; Kumar, Pankaj; Varughese, K. T.; Thomas, Sabu

doi:10.3144/expresspolymlett.2007.88

Cited by 117 publications

(101 citation statements)

References 44 publications

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“…Among numerous techniques for interface characterization, DMA has attracted ever more attention because it provides a sensitive and nondestructive detection of the interphase [18][19][20]. DMA detects the molecular motions through measuring two types of response to a low strain periodic deformation, an elastic (stiffness) term and a damping (energy dissipation) term, and the damping is a sensitive indicator of all kinds of molecular motions that are going on in a material.…”

Section: Dynamic Mechanical Analysis Of the Compositesmentioning

confidence: 99%

Mechanical and dielectric properties of epoxy/dicyclopentadiene bisphenol cyanate ester/glass fabric composites

Wang¹,

Liang²,

Yan³

et al. 2008

Express Polym. Lett.

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Abstract. The impact and flexural strengths of epoxy-dicyclopentadiene bisphenol cyanate ester (EP-DCPDCE) hybrid thermoset as well as the interlaminar shear strength (ILSS) and flexural strength of the composites consisting of the hybrid thermoset and glass fabric were studied. It is found that the addition of epoxy resin (EP-51) can improve the mechanical properties, particularly, the impact strength of DCPDCE matrix and the ILSS of glass fabric reinforced composites. The improvements of the mechanical properties were obvious when the content of EP-51 is from 15 to 30 wt%. The investigations of the interphase of composites by scanning electron microscope (SEM) and dynamic mechanical analysis (DMA) confirm the improvement of mechanical properties of the composites. However the addition of EP-51 has negative effects on the thermal and dielectric property of the composites.

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Section: Dynamic Mechanical Analysis Of the Compositesmentioning

confidence: 99%

Mechanical and dielectric properties of epoxy/dicyclopentadiene bisphenol cyanate ester/glass fabric composites

Wang¹,

Liang²,

Yan³

et al. 2008

Express Polym. Lett.

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“…Usually a dynamic mechanical thermal analysis (DMTA) test is carried out [14] where the frequency of the applied stress or strain and the temperature are changed in parallel. Another method is the stress relaxation measurement where a constant strain is applied on the specimen and the reaction force is detected as a function of the time.…”

Section: Materials Characteristicsmentioning

confidence: 99%

Viscoelastic characterization of an EPDM rubber and finite element simulation of its dry rolling friction

Felhös¹,

Xu²,

Schlarb³

et al. 2008

Express Polym. Lett.

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Abstract. The viscoelastic properties of an ethylene/propylene/diene rubber (EPDM) containing 30 parts per hundred parts rubber [phr] carbon black (CB) were determined by dynamic mechanical thermal analysis (DMTA) measurements. A 15-term Maxwell-model was created to describe the time-dependent material behavior of this rubber. The frictional behavior under dry rolling conditions was studied on a home-built rolling ball (steel)-on-plate (rubber) (RBOP) test rig. Both normal and tangential forces were detected during the measurements. The rolling test was simulated with the MSC.Marc finite element (FE) software using the evaluated viscoelastic material properties. Results of the experimental tests and of the simulation were compared and a good agreement was found between them.Keywords: modeling and simulation, rubber, viscoelasticity, finite element method (FEM), rolling friction eXPRESS Polymer Letters Vol.2, No.3 (2008) [157][158][159][160][161][162][163][164] Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2008.21 The linear-viscoelastic properties of the rubber were determined by dynamic mechanical thermal analysis (DMTA). On the basis of DMTA measurements a master curve was created and a 15-term Maxwell-model was fitted to this master curve. To describe the incompressibility and the non-linear behavior of the rubber, i.e. the non-linear stressstrain curve, the Mooney-Rivlin material model was used. The constants of the two term MooneyRivlin material law were calculated by simplified equations [20][21]. For the simulations the FE software MSC.Marc was used. The rolling friction of an ethylene/propylene/diene rubber (EPDM) was measured in an oscillating rolling ball (steel)-on-plate (rubber) configuration (Oscillating-RBOP) and simulated by FEM. Friction force, normal load and coefficient of friction (COF) were determined. The results of the tests and the simulations were compared with each other and discussed. Experimental Rolling friction testRolling friction tests were carried out on a home built test rig with oscillating rolling ball (100Cr6, d = 2r = 14 mm, R a = 1 µm) and stationary rubber plate (cf. Figure 1). The steel ball is driven by the driver part to conduct oscillating rolling motion on the rubber plate. The load is applied by a lever system. The reciprocating linear rolling of the ball occurred with an amplitude of A = 25.06 mm, a cyclic frequency of f = 1/30 Hz under a normal load of 140 N. The normal and friction load are measured by load cells. The load cell which measures the normal load (Load cell 1, cf. Figure 1) is placed under the base plate, while the other load cell which measures the friction force (Load cell 2) is placed at the driver element. The ball is rolling in the guiding edges of the driver part (cf. Figure 1c). Test conditionsThe linear reciprocating movement of the driver part and the reciprocating rolling of the ball have different amplitudes and speeds due to the set-up. As starting point of our calculations we used the known movement of the...

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“…These properties play an important role in deciding a material to find application in required fields [12,13]. Therefore, knowledge of these properties is essential.…”

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical, mechanical and thermal analysis of CPI/NBR blends: effect of blend composition and crosslink density

et al. 2015

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Blends of cis-polyisoprene (CPI) and nitrile butadiene rubber (NBR) in different volume ratio were prepared to see the effect of composition on different properties. Structure characterization has been done through X-ray diffraction and scanning electron microscope. Scanning electron micrographs confirm homogeneous nature of all the blends. The dynamic mechanical analyzer was used to measure damping, storage modulus, glass transition temperature and mechanical properties (Young's modulus and tensile strength) of these blends. Activation energy and fragility were determined for the non-Arrhenius (fragile) behavior of viscosity using Vogel-Fulchuer-Tammann (VFT) equation. Thermal conductivity has been analyzed through thermal constant analyzer. Results indicate that all the measured properties are dependent on blend composition and crosslink density.

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Dynamic mechanical analysis of binary and ternary polymer blends based on nylon copolymer/EPDM rubber and EPM grafted maleic anhydride compatibilizer

Cited by 117 publications

References 44 publications

Mechanical and dielectric properties of epoxy/dicyclopentadiene bisphenol cyanate ester/glass fabric composites

Mechanical and dielectric properties of epoxy/dicyclopentadiene bisphenol cyanate ester/glass fabric composites

Viscoelastic characterization of an EPDM rubber and finite element simulation of its dry rolling friction

Dynamic mechanical, mechanical and thermal analysis of CPI/NBR blends: effect of blend composition and crosslink density

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