Permeation of Multifunctional Acrylates through Three Protective ClothingMaterials

摘要

Permeation tests were conducted with trimethylolpropane triacrylate (TMPTA), 1,6-hexanediol diacrylate (HDDA), and two mixtures of 1,6-hexanediol diacrylate with 2-ethylhexyl acrylate (EHA) to better understand the permeation behavior of multifunctional acrylate compounds. The tests were conducted using the ASTM F739-85 permeation method with a silicone rubber sheeting material as the collection medium because of the low vapor pressure and low water solubility of the acrylate compounds. Permeation tests were performed at 20 C with butyl, nitrile, and natural rubber glove materials. None of the acrylate compounds nor mixtures was detected to permeate the butyl or nitrile rubber at the conditions and sensitivity of the method. Permeation of the natural rubber was detected in a test with pure HDDA, a 50% HDDA/50% EHA mixture, and a 25% HDDA/75% EHA mixture. TMPTA permeation through the natural rubber was also detected but only in one of the triplicate tests after the 360-480 min sampling interval. For pure HDDA, the breakthrough detection time was 30-60 min and the steady-state permeation rate was 0.92 microg/sq cm-min. For for HDDA/EHA mixtures, permeation of both mixture components was detected at the same time in each test. The breakthrough detection time was 30-60 min for the 50% HDDA/50% EHA mixture and was from 15-30 to 30-60 min for the 25% HDDA/75% EHA mixture. The HDDA steady-state permeation rates from the mixtures were somewhat higher than that measured for pure HDDA: 1.02 microg/sq cm-min for the 50% HDDA/50% EHA mixture and 1.35 microg/sq cm-min for the 25% HDDA/75% EHA mixture. The slight increase in permeation rate is attributed to the presence of the more rapidly permeating EHA carrier solvent, which has a permeation rate of 11.7 microg/sq cm-min from the 50% HDDA/50% EHA mixture and 20.0 microg/sq cm-min from the 25% HDDA/75% EHA mixture. Permeation tests with pure EHA, however, were not performed.