Chemical difference between silicone and polyurethane
One of the principal differences between silicone and polyurethane sealants is the chemical composition.
Silicone is an inorganic substance, while polyurethane is organic.
The primary difference between organic and inorganic substances is the presence of carbon.
Organic compounds contain a carbon atom.
In most cases, a hydrogen atom is also present.
With an inorganic substance, it’s uncommon for either atom to be present.
Polyurethane is a polymer, which comprises of a series of organic atoms connected by carbamate.
Silicone is a unique material because it contains both inorganic and organic compounds.
These synthetic polymers comprise silicon and oxygen atoms, which are joined using C-Si bonds.
The makeup of the chain exposes the organic elements of the structure to external influences.
This is why silicone makes such a versatile sealant.
Silicone is commonly used in construction and the development of paint and food products.
The chemical makeup of both silicone and polyurethane sealant are important.
This is because the composition affects the breakdown of the materials.
When organic and inorganic substances are exposed to UV light from the sun, the way they react differs.
Inorganic materials are less responsive to UV rays than organic chemicals.
In the long-term, polyurethane, an organic material, will revert back to its natural state in response to UV exposure.
This affects both the lifespan and versatility of polyurethane sealant.