Answer:
Silicone rubber impression materials exhibiting strength, elasticity and dimensional stability were discovered in 1955 in University of Liverpool by S.L. Pearson.
Explanation:
• Silicone rubber is a high-performance elastomers which characterized by an unusual combination of properties.
• Excellent electrical insulation properties as well as its transparency, these properties range from high temperature performance to durability.
• Rubber like material composed of silicone containing silicone together with other molecule like, hydrogen, carbon and oxygen.
• Its structure always comprises silicone-oxygen chain and an organic moiety bound to the silicon
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