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How does the relative molecular mass and distribution affect silicone pressure sensitive adhesives?

Mar 17, 2020

In many cases, the performance of silicone pressure-sensitive adhesives, then what is the relative molecular mass and distribution of silicone pressure-sensitive adhesives? Next, I will introduce you to this knowledge, and follow this article to find out.


Relative molecular mass and distribution have a great impact on the various properties of silicone pressure-sensitive adhesives. When reducing the molecular weight of silicone pressure-sensitive adhesives, the bulk viscosity can be reduced, which is beneficial to the wetting of the surface of the adherend and thus the interface Adhesion. However, when the relative molecular mass is too low, the cohesive strength is poor. When peeling, the adhesive layer is prone to cohesive failure. Increasing the relative molecular mass can increase cohesion, but too large a relative molecular mass can hinder dispersion and wetting. Therefore, the relative molecular mass of the silicone pressure-sensitive adhesive must be within a certain range to obtain good adhesion properties. Relative molecular mass distribution also has a greater impact. Generally, products with broader relative molecular mass distribution have better adhesion properties.


RH-SP604-Transparent-liquid-anti-high-temperature



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