Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Machine Dynamics Research

1 2010

Powiadomienia systemowe

Sesja wygasła!

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: właściwości mechaniczne PE

Sortuj według:

Ogranicz wyniki do:

Study of the Fillers Influence on Mechanical Properties of PE by Using of AFM Measurements

Bakošova D., Šišáková J., Bezecný J., Rusnáková S.

Machine Dynamics Research

2010

Vol. 34, No. 3

13-20

The works deals with a study of fillers influence on choosing mechanic properties of high density polyethylene (HDPE) by using of atomic force microscopy (AFM), where the using method and equipment are describe. Atomic-force microscope in a complex with control and image processing software is intended for measurement and analysis of surface micro- and submicro relief, objects of the micro- and nanometer range with high resolution. Using AFM it is possible to scan curves that show dependence of composite action force of the probe and surface of the sample on distance between them - they are curves of approach /moving off. These curves are very important for measurements of vertical force attached to the surface from the side of the tip in the process of scanning. Besides the force it is also possible to evaluate viscosity of dirty surface, thickness of the covering layer and also local variations of elastic features of the surface from the curve. The curve of approach /moving off is a graphic dependence of measuring cantilever deviation on scanning device extension. Van der Waals forces are only one factor of cantilever deviation affecting. The measurement will be also influenced by thin layers of moisture that are usually present at working with AFM in the presence of air and also streaks and impurities. In presented measurements by using of spectroscopic curve were evaluated the homogeneity and ratio of Young modulus on HDPE samples. The HDPE samples were prepared in standard version and by adding of silver and gold pigment. For each sample was creation the curve by using of five different places - points. We employed the general approximation and Snedonn's formula for analysis dates and calculation of Young's modulus off complete rake curve. From spectroscopy curves and following calculations were occurred that the Young modulus of the silver sample is the 1.197 times more than the standard HDPE together the gold HDPE which is 0.822 times lesser than standard. We can allege that the silver pigmented HDPE has the reinforcing effect. From these surface topography and spectroscopic curve inclination is possibly to say that all used samples are homogeneous.