Basic properties of selected types of plastic materials for automotive industry

• Autorzy: Čížek L. , Olejníčková L.
• Konferencja: Międzynarodowe Sympozjum: Metody oceny struktury oraz własności materiałów i wyrobów (XXIII ; 22-24.10.2008 ; Jarnołtówek, Polska)
• Języki publikacji: EN

Abstrakty

EN

Synthetic polymers are represented by an extensive range of materials, which play nowadays a completely irreplaceable role in numerous technical applications. Unusually rapid and universal expansion of production and processing of polymers has several principal causes. On one hand the polymers can replace conventional materials (metals, ceramics, wood, leather, wool, natural caoutchouc, etc.), on the other hand their properties enable quite new applications and novel solutions of material problems. Many polymers are made from comparatively cheap and easily available raw materials and they can therefore substitute scarce and expensive materials. Another advantage of polymers consists in the fact that they have low density, as well as often very good electric insulation properties and comparatively high resistance to corrosion. The polymers can be moreover very easily processed by forming. Nevertheless, the polymers have obviously not only advantages, but some drawbacks as well. They comprise usability of polymers only in limited temperature interval, difficult repairs of products made of them and rather complicated regeneration of wastes [1]. Evaluation of polymeric materials from the viewpoint of their suitability for individual industrial applications requires a broad range of testing methods. The most important are tests aimed at mechanical properties [2]. Tensile tests of plastic materials are described in detail in the standards [3]. Another mechanical test used for testing of plastic materials is standardised hardness test according to Brinell. In some polymers we observe differences between hardness values in dependence on load and time. This applies mainly to thermoplastics, The hardness values at lower loads cannot be compared with the values at higher loads. The authors have chosen for the purposes of the present paper commercial samples used in automotive industry. Test pieces were made namely from Terluran, Crastin and Lucryl. Table 1 gives selected mechanical properties of tested plastic materials. Figure 1 shows the hardness values of selected plastics at various durations of indentor. It is obvious that duration of load has a significant impact on the measured hardness values according to Brinell HB.

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2008
• Tom: z. 92
• Strony: 41--42
• Opis fizyczny: Bibliogr. 3 poz., tab., wykr.

Twórcy

autor

Čížek L.

autor

Olejníčková L.

• VŠB-TU Ostrava

Bibliografia

• [1] MLEZIVA J., ŠŇUPÁREK J.: Polymery [Polymers], Sobotáles Praha (2000).
• [2] STRNADEL B.: Rešené príklady a technické úlohy z materiálového inženýrství [Solved problems and technical exercises from material engineering], Ostrava (1998).
• [3] ISO 527-1:1996 implemented In the standard ČSN EN ISO 527-1:1996 (64 0604) Determination of tensile properties – Basic principles.