Relation between Molecular Weight Distribution of Diffusible Species and Recovery Rate of Hydrophobicity on RTV Silicone Rubber

摘要

We have investigated the relation between the molecular weight distribution (MWD) of diffusible species and the recovery rate of hydrophobicity of room-temperature vulcanizing (RTV) silicone rubber (SIR) using solvent extraction at various temperatures. Using gel permeation chromatography (GPC), we confirmed that the extract had a MWD ranging from a few hundreds to Hundreds of thousands, and the average molecular weight (MW) of the extract having MW over 3000 increased with the increase of extraction temperature.