Diffusion Limited Tapered Coating with Parylene C

Metzen, Rene P. von; Egert, Daniel; Ruther, Patrick

doi:10.1007/978-3-642-03889-1_26

Cited by 1 publication

(1 citation statement)

References 21 publications

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“…Activation energy (Ea), solubility S, and permeable parameters of gases through amorphous and crystalline PPX C membranes. [1,11,1227,32,33] Gas Ea/eV Amorphous PPX C Crystalline PPX C S/cm 3 P Calc /10 −12 cm 3 S/cm 3 P Calc /10 −12 cm 3 P Exp /10 The calculated permeability is comparable to the experimental results [1,11,12,27,32,33] in Table 5. They have the same order of magnitude.…”

Section: Permeability Coefficients Of Gases Through Ppx C Membranessupporting

confidence: 80%

Sorption and permeation of gaseous molecules in amorphous and crystalline PPX C membranes: molecular dynamics and grand canonical Monte Carlo simulation studies

Bian¹,

Shu²,

Wang³

2012

Chinese Phys. B

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Amorphous and crystalline poly (chloro-p-xylylene) (PPX C) membranes are constructed by using a novel computational technique, that is, a combined method of NVT+NPT-molecular dynamics (MD) and gradually reducing the size (GRS) methods. The related free volumes are defined as homology clusters. Then the sorption and the permeation of gases in PPX C polymers are studied using grand canonical Monte Carlo (GCMC) and NVT-MD methods. The results show that the crystalline PPX C membranes provide smaller free volumes for absorbing or transferring gases relative to the amorphous PPX C area. The gas sorption in PPX C membranes mainly belongs to the physical one, and H bonds can appear obviously in the amorphous area. By cluster analyzing on the mean square displacement of gases, we find that gases walk along the x axis in the crystalline area and walk randomly in the amorphous area. The calculated permeability coefficients are close to the experimental data.

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