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Pitting and bubbling artefacts in surface replicas made with silicone elastomers
Author(s) -
Gordon Kathleen D.
Publication year - 1984
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1984.tb02509.x
Subject(s) - silicone rubber , epoxy , silicone , materials science , elastomer , composite material , curing (chemistry) , porosity , natural rubber , polymerization , silicone elastomers , polymer
SUMMARY Pitting or bubbling on the surface of epoxy resin replicas is a frequently encountered artefact associated with the use of silicone rubber impression materials. Several variants of this type of artefact are illustrated. It is suggested that bubbles or pits form at the mould: epoxy interface during curing of the epoxy, and that they are caused by gas escaping from the mould material itself. Duration of silicone rubber polymerization, base‐catalyst ratios, and surface porosity of the object may all influence the occurrence of mould degassing.