Tensile properties polyethylene

Eoams were extruded from low density polyethylene (LDPE) and blends of LDPE with syndiotactic polypropylene (sPP), using isobutane as the blowing agent. The extruded materials were characterised by measurement of dimensional stability at room temperature, density, tensile properties, dynamic stiffness, and crystallinity determined by differential scanning calorimetry. The sPP, with a slow crystallisation rate, did not interfere with the expansion of the LDPE, and enhanced the temperature resistance by in-situ crystallisation. The blends were flexible, dimensionally... 

South Korean company SK Chemicals produces SKYGREEN polybutylene succinate (PBS) thermoplastics based on aliphatic polyester and aliphatic/aromatic co-polyesters that were developed from SK Chemicals polyethylene terephthalate (PET) technology. SKYGREEN BDP products offer LDPE-like properties. They are used in films, disposable cutlery, food trays, hairbrush handles and paper coatings. Aliphatic versions biodegrade more rapidly and offer better processing and tensile properties than the aromatic-aliphatic grades, which cost less. 

Table 3. Tensile properties and die swell for different solid-state extruded linear polyethylenes ...

The last system that will be compared is that of polystyrene and polyethylene. In these studies,35the tensile properties of the blend with an added copolymer were examined. These studies showed that the addition of 10% diblock copolymer (50/50 composition, Mw = 80,000) to a blend that is 80% polystyrene produces an ultimate strength of 33 MPa, whereas the addition of the same amount of a random copolymer (67% polyethylene, Mw =... 

Tensile Properties Similar to polyethylene, the stress-strain curve of JSR RB has a yield point. Above the yield point, the stress-strain curve continues to increase with elongation, then breaks. This kind of stress-strain curve is similar to EVA and indicates a characteristic property lying somewhere between amorphous and crystalline polymers. The dynamic properties of JSR RB can be improved by stretch-... 

Kalaprasad, G. Francis, Bejoy Thomas, Selvin Kumar, C. Radhesh Pavithran, C. Groeninckx, G. Thomas, Sabu, Effect of fibre length and chemical modifications on the tensile properties of intimately mixed short sisal/glass hybrid fibre reinforced low density polyethylene composites. Polymer Intenuitional, 53(11), 1624—1638 (2004). 

T.M. Ushakova, E.E. Starchak, V.G. Krasheninnikov, V.G. Grinev, T.A. Ladygina, L.A. Novokshonova, Influence of copolymer fraction composition in ultrahigh molecular weight polyethylene blends with ethylene/1-hexene copolymers on material physical and tensile properties. J. Appl. Polym. Sci. 131, 40151 (2014)... 

A.W.M. Kahar, H. Ismail, N. Othman. Effects of polyethylene-grafted maleic anhydride as a compatibilizer on the morphology and tensile properties of (thermoplastic tapioca starch)/ (high-density polyethylene)/(natural rubber) blends... 

Formulations based on thermoplastic starch, EAA and polyethylene (PE) in different ratio, are suitable for film production. In Table 2.1 a few examples of such compositions (some of them containing also polyvinyl alcohol, PVOH) with their related tensile strength properties are reported. As can be seen, the film obtained with a gelatinized starch level of about 50% shows good tensile properties. 

Table 12 Tensile properties of the polyethylene-clay nanocomposite and related samples (n = 5). The values in parentheses are the relative values of the nanocomposites and PECC ...

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