Borotron HD050 is a high-density polyethylene (HDPE) formulation enhanced with 5% elemental boron that has been used to provide extra shielding against neutron radiation. The combination of boron within a matrix of HDPE, a naturally hydrogen rich material, is used nuclear shielding applications. Hydrogen rich materials attenuate neutrons extremely well and boron has an affinity for absorbing thermalized neutrons. Borotron has been used as a medical and industrial shielding material to attenuate and absorb neutron radiation. This easily fabricated polymer material also offers designers greater durability and function over a wider range of temperatures than traditional materials.
Borotron, in sheet form, is used for shielding in radiation therapy rooms, nuclear research facilities, nuclear power plants, nuclear powered ships, and in spacecraft exposed to radiation.
Borotron HD050 is a high density polyethylene base resin sheet that is enhanced with elemental boron. This engineered panel provides additional shielding against neutron radiation. HDPE is a hydrogen rich polymer that combined with boron within its matrix has proven successful in nuclear shielding applications.
Borotron is becoming a very key component in radiation neutron shielding as it is much lighter-weight than concrete and water and is much easier to design with and include in architectural engineering.
Borotron HD050 utilizes borontrioxide (B2O3) to obtain its elemental boron. Since borontrioxide is not composed purely of boron, a more intense level of B2O3 is required. Therefore Borotron products include a minimum or 16.1% of B2O3 to ensure that a 5% level of elemental boron is achieved.
A key component in the successful manufacture of Borotron is the homogeneity of elemental boron dispersion. This is crucial to the performance of neutron shielding. Testing methods and validation processes help ensure that a high level of quality is met.
FEATURES
Superior dimensional quality and flatness
Consistent density and homogeneity
Durable over a wider temperature range
Easy to handle and fabricate
APPLICATION
Borotron is used in Neutron Radiation Shielding. Potential uses include shielding for radiation therapy rooms, where the product in plate form is integrated into the wall structure. Other application environments where its properties bring similar benefits include nuclear research centers, nuclear power plants, power generation areas in nuclear submarines, production areas for nuclear detection devices and the equipment itself, and spacecraft exposed to radiation.
Typical Properties
Physical | Measurement | Value | Testing Method |
Water Absorption Immersion, Saturation | % by wt. | -- | ASTM D570 (2) |
Water Absorption Immersion, 24 Hours | % by wt. | -- | ASTM D570 (2) |
Density/Specific Gravity @ 73°F | lb/in3 | 0.0365 | ASTM D792 |
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Mechanical | Measurement | Value | Testing Method |
Compressive Modulus of Elasticity, 73°F | ksi | 97.44 | ASTM D695 |
Hardness, Durometer, Shore "D" Scale, 73°F | - | 71 | ASTM D2240 |
Tensile Modulus of Elasticity, 73°F | ksi | 111.2 | ASTM D638 |
Coefficient of Friction (Dry vs. Steel) Dynamic | - | -- | QTM 55007 |
Izod Impact (notched), 73°F | ft-lb/in | 0.9 | ASTM D256 Type "A" |
Flexural Strength, 73°F | psi | 4220 | ASTM D790 |
Elongation at Yield | % | -- | - |
Tensile Strength, 73°F | psi | 2407 | ASTM D638 |
Flexural Modulus of Elasticity, 73°F | ksi | 126.6 | ASTM D790 |
Tensile Elongation at Break, 73°F | % | 4 | - |
Compressive Strength, 10% Deformation, 73°F | psi |
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Thermal | Measurement | Value | Testing Method |
Heat Deflection Temperature @ 264 psi | °F | 116 | ASTM D648 |
Coefficient of Linear Thermal Expansion (-40°F to 300°F) | μin/in-°F | 110 | E-831 (TMA) |
Flammability, UL94 | - | - | - |
Melting Point (Crystalline) Peak | °F | 262 | ASTM D3418 |
Continuous Service Temperature in Air (Max.) (1) | °F | - | - |
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Electrical | Measurement | Value | Testing Method |
Surface Resistance | ohms/sq. | >= 1.00e+12 | ANSI/ESD STM 11.11 |
Surface Resistivity | ohm-cm | - | ANSI/ESD STM 11.11 |
Borotron HD050 Pictures