How do impurities in an adhesive affect microwave attenuation?

TWI Frequently asked question

by Sam Rostami

The presence of polar additives and impurities in an adhesive increases attenuation and dissipation of microwave energy within the adhesive.

Further information

What is a microwave?
How is microwave energy absorbed into an adhesive?
Why are microwave-transparent adhesives important?
Are polymeric adhesives microwave transparent?