The Universal Selection Source: Plastics & Elastomers
A SpecialChem Client is seeking a high-reflection coating to maximize the throughput of emitted light to their transparent polymer (acting as a light guide).
A SpecialChem Client is seeking a solution of filling porous substrate and small gaps to make it watertight. The solution should be waterproof with long-term stability. Due to the ...
A SpecialChem Client is seeking a resin system that is capable of providing “fast” and “slow” curing mechanisms under mild conditions.
The first curing mechanism sets the resin in...
A SpecialChem Client developed a technology allowing recycling and/or purification of metals from solid or liquid mixtures. Thanks to the way it works, the technology can be tailor...
The SpecialChem Client is offering safer and faster tetrazoles synthesis process by heterogeneous phase catalyzed by a supported organotin reactant.
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Hardness qualifies the resistance to permanent indentation of a material. Rockwell M hardness is a standardized test which consists in measuring the depth of penetration of a polished steel ball pressed at the surface of a plastic under controlled conditions. The higher the value, the harder the material. Rockwell Hardness measures are dimensionless.
Rockwell Hardness test is generally used for hard materials, like PA, PC, PS or POM, where the resilience or creep of the polymer is less likely to affect results. Different Rockwell Hardness scales utilize different size of steel balls and different loads. The three most common scales used for plastics are Rockwell E, Rockwell M, and Rockwell R.
Test methods used to measure Rockwell Hardness M are ASTM D785 and ISO 2039-2.
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