rexolite plastic

Rexolite® is a thermoset, rigid and translucent plastic produced by cross linking polystyrene with divinylbenzene.

CHARACTERISTICS OF REXOLITE®:

Outstanding Dielectric properties
Dielectric constant of 2.53 (up to 500GHZ) together with extreme low dissipation factor.
Valuable for microwave lenses, microwave circuitry, antennae, coaxial cable connectors, sound transducers, TV satellite dishes and sonar lenses.
Other uses include non-destructive material testing devices, surveillance equipment, radar windows, radomes and missile guidance system housings. One interesting application is for radar lenses which are used for mapping the earth's surface from fast high-flying aircraft.

High voltage insulators
Ability to withstand high voltage is important for producing gap switch houses, capacitors and other components. Rexolite® is proven superior over acrylic for dendriting resistance.

Radiation Resistance
Superior to most plastics. Little change in dielectric loss over a wide range of exposures up to 1000M Rads. Has superior resistance to mechanical deterioration by ionizing radiation.

Rigidity and dimensional stability
Rexolite® exhibits no permanent deformation or plastic flow under loads of 10 to 2000 PSI at temperatures of 20 to 125 C. In addition, all castings are stress-free, not requiring any stress relieving prior to, during or after machining.

Self extinguishing
Burn rate of less than 1" per minute.

Optical
Transmission approximately equals to acrylic - (87% visible light, 1" thick). Refraction index 1.59 @ 589 nanometers, 1.604 @ 486 nanometers and 1.585 @ 656 nanometers. Used in combination with acrylic lenses for color correction.

Sound transmitting
Excellent acoustic impedance close to water. Velocity 93x10"/second.

Out Gassing
Negligible. Residual monomer greatly reduced.

Water Absorption
Less than .05 percent. Type 1422 has been immersed in boiling water for 1000 hours without change in dielectric constant.

Machinability
Handles well in all machining operations. Tool configuration is similar to those used on acrylic. Because of high resistance to cold flow and freedom from stress, it is easily machined or laser beam cut to very close tolerances and accuracy of .0001 can be obtained in grinding. Rexolite will not craze, providing sharp tools are used and excessive heat is not generated in polishing.

Chemical resistance
Alkalies, alcohols, aliphatic hydrocarbons and mineral acids have no effect. Aromatic and hydrocarbons cause swelling and should be avoided.

Light weight
Specific gravity of 1.05. Approximately 15 percent lighter than acrylic and less than half of TFE.

Environmentally friendly
Nonhazardous, contains no ingredients harmful to the environment.

REXOLITE 1422: Thermoset cross-linked styrene copolymer. Combination of good physical and excellent electrical properties including low loss and stable dielectric constant makes this material suitable for use in microwave lenses as well as for precision components.
* Note: Rexolite 1422 meets requirements of L-P-516A (Type E2) formerly MIL-P-77 (Type E-2)

REXOLITE 2200: Thermoset cross-linked styrene copolymer with glass mat reinforcement to provide greater temperature stability and strength. Highly suited for missile and other applications where extreme cold, thermal shock and mechanical stress are encountered.
Used principally for printed circuit boards.


REXOLITE
1422
REXOLITE
2200
ELECTRICAL
Dielectric constant at 1MHz - 500GHz 2.53 2.62
Typical dissipation factor at: 1MHz .00012 .0004
Typical dissipation factor at: 10MHz .00025 .0005
Typical dissipation factor at: 10GHz .00066 .0014
Volume resistivity (Ohm-cm) > 10~16 5 x 10~13
Surface resistivity (Ohm) > 10~14 5 x 10~12
Dielectric strength - step by step (volts/Mil) 500 500
PHYSICAL
Specific gravity 1.05 1.11
Tensile strength (psi) 9000 9500
Flexural strength (psi) 11500 10500
Impact strength - Room temperature to -75° C (Ft lb./In. of notch) 0.3 0.75
Coefficient thermal expansion (1° C) 7.0 x 10~5 5.7 x 10~5
Thermal conductivity - Col/Sec/cm° C/cm 3.5 x 10~4 5.0 x 10~4
Recommended operating temperature range -60° to +100° C -75° to +100° C
Acoustic impedance - Velocity of sound 93 x 10~3/sec
CHEMICAL
Water absorption .05 Max .10 Max
Alkalis (Sodium/Potassium Hydroxide) No effect No effect
Alkalis (Sodium/Potassium Hydroxide) No effect No effect
Alcohols (Methanol/Isopropanol) No effect No effect
Aliphatic Hydrocarbons (Pentane, Cyclohexane, n-Heptane, n-Hexane No effect No effect
Aromatic Hydrocarbons (Benzene, toluene, xylene, styrene) Swells Swells
Mineral Acids (Hydrochloric, Sulfuric, Nitric) No effect No effect
Chlorinated Hydrocarbons (Carbon Tetrachloride, Chloroform) Swells Swells
OPTICAL
Visible light 1" thick 87%
Refractive index 589 1.59
Refractive index 486 1.604
Refractive index 656 1.585



ROD
TOLERANCES

1/16" to 5/8" ...... ± .001
3/4" to 1" ........... ± .002
1-1/8" to 2" ....... +.008 -0
2-1/4" & up 2" .... +1/8 -0
ROD
RANDOM LENGTHS
:
1/16" to 3/32" ...... 4ft, 8ft
1/8" to 1-1/2" ...... 4 ft, 6 ft, 8 ft, 12 ft
1-5/8" to 2-1/2" .... 4ft, 8ft
2-3/4" to 6" ........ Up to 4ft
7" to 8" ............ Up to 36"




Contact us for more info