EN
EN
ZEONEX
In addition, we also offer a cyclic‑olefin polymer, ZEONEX®, for ultra‑high‑vacuum environments(10-9– 10-11mm Hg). It features excellent mechanical properties, good chemical stability and extremely low outgassing under vacuum. The main properties of this material are listed below.
Typical Properties of ZEONEX：
Density （ASTM D792） | 1.01 g/cm3 |
Tensile modulus （ISO527-2） | 363000 psi |
Longation at yield （ISO527-2） | 10 % |
Flexural strength （ISO178） | 15100 psi |
Flexural modulus （ISO178） | 363000 psi |
Hardness （JIS K5401） | F |
Heat deflection temperature （JIS D648） | 122°C |
Glass‑Transition temperature （JIS K7121） | 139°C |
Coefficient of thermal expansion （ASTM E831） | 6*10-5 cm/cm°C |
Water absorption （ASTM D570） | <0.01% |
Refractive index （ASTM D542） | 1.531 |
Modulus of rupture | 15100 psi |
Similar to TPX, ZEONEX is optically transparent in the visible range and exhibits no refractive‑index dispersion. Therefore, terahertz‑optical systems built with ZEONEX can be aligned using a HeNe laser beam.
It should be noted that ZEONEX exhibits higher transmittance in the visible‑light region than TPX.
Fig. 20. Transmission of 2 mm-thick ZEONEX and TPX windows.
Compared with TPX, ZEONEX has superior mechanical properties, which makes it possible to fabricate prisms from this polymer.