Transport parameters and models of physical aging of additive polytricyclononene with SiMe3 groups

Using barometric technique, gas permeation parameters (permeability (P), diffusion (D) and solubility (S) coefficients) were determined in glassy, amorphous addition poly(3,4-bis-trimethylsilyl)-tricyclononene) (PTCNSi2). It was shown that high permeability of this polymer is caused by great values...

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Bibliographic Details
Published in:Polymer (Guilford) 2021-03, Vol.217, p.123447, Article 123447
Main Authors: Belov, N., Nikolaeva, D., Yampolskii, Yu
Format: Article
Language:English
Subjects:
Aging
Barometers
Diffusion coefficients
Gas permeation
Gases
Permeability
Poly(3,4-bis-trimethylsilyl)-tricyclononene
Polymer aging
Polymers
Process parameters
S parameters
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Summary:Using barometric technique, gas permeation parameters (permeability (P), diffusion (D) and solubility (S) coefficients) were determined in glassy, amorphous addition poly(3,4-bis-trimethylsilyl)-tricyclononene) (PTCNSi2). It was shown that high permeability of this polymer is caused by great values of the D and S parameters. Aging process of PTCNSi2 was investigated first by estimating the P, D, and S parameters of nitrogen at relatively short aging times and then by determination of the same parameters for different gases for longer times. Analysis of the kinetics of aging indicated that exponential model of aging gives a somewhat better fit of the experimental data than an alternative power model at shorter aging times, while for longer times the analysis is in favor of the power model. [Display omitted] •First determination of the diffusion (D) and solubility (S) coefficients in poly(3,4-bis-trimethylsilyl)-tricyclononene).•Demonstration of the decreases in P, D and S values in time.•Contacts of the membrane with ethanol and butane immediately increase the P and D values.•Exponential model of aging gives good fit of the experimental data at shorter aging times.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2021.123447