Tensile-impact Strength

Mechanical with impact —by measuring tensile impact strength. 

Tensile impact strength (Kg-cm/cm) Blown film properties 1132 2930 780... 

Wt%of graft polymer Stress at 15% elongation (MPa) Stress at 30% elongation (MPa) Stress at 50% elongation (MPa) Tensile strength (MPa) Elongation at break (%) Tensile impact strength (J/m2)... 

The SEM investigation shows that the particle size of the dispersed domain size decreased from 3.3 to 1.1 fxm with the incorporation of 6 wt%, EMA, and this indicates the increased surface area of the dispersed phase morphology. The increase in surface area led to effective compatibilization and is responsible for the increased adhesion strength and tensile impact strength of compatibilized blends. 

The improved notched impact strength obtained in a 5%, 5000/5000, PSF/PSX block copolymer blend is achieved with minimal sacrifice in polysulfone properties. The data in Table VII indicate that heat distortion temperature is reduced by only 5°C. Tensile strength and modulus are reduced by ca. 10%, and elongation and tensile impact strength (unnotched) are essentially unchanged. 

Figure 15. Light stability of HDPE plaques (Ziegler). Florida exposure, KLY to 50% retention of tensile impact strength.

In many cases a regrind requires higher amounts of an antioxidant added for restabilization. Here is an example of restabilization of an HOPE material that was stored for up to 18 years. Placed in a weathering box, the material began to deteriorate after 1000 h of exposure. With 0.2% of added Recyclossorb 550, tensile impact strength of the material increased to 260% of the initial. With 0.5% added Recyclossorb 550, tensile impact strength increased 6.4 times [12],... 

Temp., C Tensile Impact Strength, joules/cm Izod Impact Strength, joules/cm ... 

B5 Tensile impact strength 50% of the value obtained on unprestrained. unexposed test pieces... 

BS 2782, Method 354A and B, Determination of tensile-impact strength. 1991. 

Some emulsion PVC grades (e g., Vestolit P 1382 K) are modified with acrylate (20%) which makes them suitable for use as an additive to suspension, mass, and emulsion PVC to increase impact resistance of pigmented and translucent products. 10% addition does not affect Vicat softening temperature of film but increases its tensile impact strength and improves the deep drawing behavior of films. 

En kJ m tensile-impact strength (notched specimen) according to ISO 8256... 

Effect of RMM on the tensile impact strength of linear polyethylene. A normal polymer with a distribution of RMM was split into a number of fractions each fraction had a particular RMM. The tensile impact strength of each fraction was measured. The tensile impact strength increases with RMM. The experiment quantifies the common experience that paraffin wax (which can be looked upon as a polyethylene with less than 200 CHj units in the molecule) is a brittle solid, with a toughness incomparably less than that of polyethylene. (After L. H. Tung. S. P. E. Conference Proceedings (1958) p. 959.)... 

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