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Unit 6, No. 12, Pouya Complex, Nazafarin St., Shah Nazari St., Madar Sq., Mirdamad, Tehran

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Metasan supplies epoxy resins, polyurethane, additives, and chemical solvents for retail and wholesale customers throughout Iran. At Metasan, you can purchase raw materials from brands including Khuzestan Petrochemical, Karun Petrochemical, Kumho Korea, Tosoh Japan, JANA Saudi Arabia, BASF, Wanhua China, Dorun, and Henan.

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Home/Products/ Polyimides/ Rohacell® 51 Polymethacrylimide (PMI) Rigid Foam Sheet

Rohacell® 51 Polymethacrylimide (PMI) Rigid Foam Sheet

ROHACELL 51 is a low density grade and a very high strength:weight ratio.
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Chemical nature
ROHACELL is manufactured by hot forming of methacrylic acid/methacrylonitrile copolymer sheets. During foaming this copolymer is converted to polymethacrylimide.Information supplied by Emkay Plastics, Ltd
Advantages
low density grade very high strength closed-cell rigid expanded plastic material for light weight sandwich construction excellent mechanical properties high dimensional stability under heat solvent resistance particularly at low temperature, a low thermal conductivity highest strength and moduli values highest for any foamed plastic in its density range

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    Specifications

    PropertyValueUnit

    Electrical Properties

    Dissipation Factor0.005Frequency 2.60e+10 Hz@
    Dielectric Constant1.11Frequency 2.60e+10 Hz@
    Surface Resistance9,000,000,000,000ohm
    Dielectric Constant1.07Frequency 2.00e+9 Hz@
    Dissipation Factor0.0011Frequency 1e+10 Hz@
    Dielectric Constant1.06Frequency 1e+10 Hz@
    Dissipation Factor0.0002Frequency 2.00e+9 Hz@
    Dissipation Factor0.0004Frequency 5.00e+9 Hz@
    Dielectric Constant1.09Frequency 5.00e+9 Hz@

    Physical Properties

    Moisture Expansion<2.050days immersion at 20°C%
    Moisture absorption17.4at Equilibrium; 98% RH%
    Density0.0513ASTM D1622-63g/mL
    Moisture absorption5at Equilibrium; 65 RH%
    Moisture absorption4.2at Equilibrium;50% RH%
    Moisture absorption2.6at Equilibrium; 30% RH%
    Moisture absorption1.3at Equilibrium;15% RH%

    Chemical Properties

    Water absorption1550days immersion at 20°C; at Saturation%
    Oxirane Oxygen Content19 – 20%

    Thermal Properties

    Maximum Service Temperature180Dimensional stability per DIN 53424°C
    Thermal Conductivity0.029ASTM C177-63W/(m K)
    Thermal Expansion24Temperature -100 °C; Linear@um/(m-°C)
    Thermal Expansion33ASTM D696-70@Temperature 20.0 °C; Linearum/(m-°C)

    Mechanical Properties

    Flexural strength1.57ASTM D790-66; at YieldMPa
    shear modulus18.6ASTM C273-61MPa
    Tensile modulus-MD68.6ASTM D638-68MPa
    Compressive Strength0.883ASTM D1621-64; at YieldMPa
    shear strength0.786ASTM C273-61MPa
    Tensile strength1.86ASTM D638-68MPa
    Elongation at break-MD4ASTM D638-68%

    Appearance Properties

    AppearanceWhite