Mechanical properties tear strength

As expected, the addition of high PSi loadings and minimize the FASi content in hybrid filler system increased the tensile properties, tear strength, and abrasion resistance of NR composite. The incorporation of smaller particle size of FASi gave a slight increase in tensile modulus and hardness of NR composites filled with hybrid filler. Overall, the optimum mechanical properties of hybrid filler composites were obtained at 5/75 FASi/PSi of 40 phr filler loadings. 

They found that both grades of RHA, low- and high-carbon contents, provided inferior mechanical properties (tensile strength, modulus, hardness, abrasion resistance, and tear strength) compared with those of reinforcing filler such as silica and carbon black. Other finding reported that incorporation of RHA into polypropylene led to an increased flexural modulus of the composites (Fuad et al. 1998). 

Sisal fiber-NR Mechanical properties Tensile strength decreased up to 17.5 vol% loading and then increased. The tear strength and modulus values showed a consistent increase. [21 ... 

Oil palm-NR Mechanical properties, processing characteristics Mercerization I ncreased the tensile properties, tear strength, and hardness. Scorch and curing time was found to be independent of modification of fiber surface. [22]... 

Mechanical properties (tensile strength, elongation at break, viscoelastic creep, tear initiation and propagation resistance)... 

It is generally claimed that metallocene polyethylenes (often abbreviated to m-PE) exhibit superior mechanical and optical properties as well as better organoleptic properties (resulting from the lower residue levels). As an example m-LLDPE is particularly favoured as a stretch film for wrapping because of the good prestretchability, high puncture resistance and tear strength, all of which are claimed to be better than with conventional LLDPE. 

The mechanical properties of these blends are also increased with an increase in compatibilizer concentration. The improvement in tensile strength and tear strength on the addition of modified polyolefins are shown in Fig. 15. The mechanical properties also show a leveling off after the optimum concentration. The im-... 

Determination of mechanical properties like tensile strength, tear strength, modulus, and elongation at break are the most common methods adopted to determine the cured properties of short fiber-mbber composites. Murty and De [133] discussed the technical properties of short fiber-mbber composites whereas Abrate [8] reviewed the mechanism of short fiber reinforcement of mbber. Fiber concentration in the matrix plays an important role in the optimization of the required... 

Clay hllers were surface modihed with TMPTA or triethoxyvinyl silane (TEVS) followed by EB irradiation by Ray and Bhowmick [394]. Both the untreated and treated fillers were incorporated in an ethylene-octene copolymer. Mechanical, dynamic mechanical, and rheological properties of the EB-cured unfilled and filled composites were studied and a significant improvement in tensile strength, elongation at break, modulus, and tear strength was observed in the case of surface-treated clay-filled vulcanizates. Dynamic mechanical studies conducted on these systems support the above findings. 

PVC/NBR polymer blends can be produced as colloidal or mechanical blends, the former generally giving superior properties. Commercially available blends have PVC contents ranging from 30-55%. The blends have reduced elasticity, which gives improved extrudability, but they also exhibit superior ozone resistance, improved oil swell resistance, and tensile and tear strength this, however, is achieved at the expense of low temperature flexibility and compression set. The ozone resistance of such blends is, however, only improved if the PVC is adequately distributed and fluxed. This is harder to achieve in mechanical blends, but if it is not achieved failure due to ozone attack can occur. 

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