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Emission profile of butan-2-one oxime from commercially available neutral silicone sealant

Abstract

The paper presents results of research on emission profile of butan-2-one oxime (methyl ethyl ketoxime, MEKO) released from two types of commercially available neutral silicone sealants: silicone type ‘S’ and silicone type ‘T’. To determine the emissions from silicone samples, the system consists of a stationary emission chamber, and the thermal desorption-gas chromatography-mass spectrometry system was applied. First, the research aimed to describe the emission profile of butan-2-one oxime considering different methods of application of silicone caulk: separate strips, merged strips, and dotted. Silicone sealant was applied in these three different ways to produce varying surfaces. As a result, significant differences in the emission profile were observed for the different methods of silicone application. The greatest difference in the emission rate was found to be between those of the dot shape and those of the separate strips; the emission rate was approximately five times smaller for dot shape. Moreover, the studies focused on quantitative emissions of butan-2-one oxime over a set time period. The research results indicate that, in the emission process of butan-2-oxime from a neutral silicone sealant, there are three main stages of emission. The first stage is dynamic emission, occurring during the first few days after application. The second stage is declining emission, and the third stage is stable residual emission. Between the first and third stages, the amounts of emitted oxime differ significantly. The difference in the emissions of butan-2-one oxime between the first and last stages of emission ranged from factors of 100 to 1000.

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
MICROCHEMICAL JOURNAL no. 156,
ISSN: 0026-265X
Language:
English
Publication year:
2020
Bibliographic description:
Klewicz K., Marć M., Zabiegała B.: Emission profile of butan-2-one oxime from commercially available neutral silicone sealant// MICROCHEMICAL JOURNAL -Vol. 156, (2020), s.104982-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.microc.2020.104982
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