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    dct:description """
              This article presents the results of a systematic synthesis study of elastomeric crosslinkable polysilicon olefins, the related thermal crosslinking kinetics, and the main permeability parameters recorded for inorganic gases (He, N2, O2, and CO2) and C1-C 7 hydrocarbons. Poly(vinyl allyl dimethylsilane) (PVADMS; glass-transition temperature < 273°K) was obtained by the anionic polymerization of bifunctional vinyl allyl dimethylsilane monomer. The polymers were amorphous, high molecular compounds with mixed carbo-heterochain structures containing double bonds capable of intermolecular crosslinking under a thermal treatment. Thus, thermally crosslinked polymers exhibited a high resistance toward exposure to organic vapors, unlike noncrosslinked PVADMS. IR spectroscopy was used to investigate the polymer structural changes induced by the thermal treatment. An original technique based on a differential method was used to measure gas permeability during thermal crosslinking. PVADMS possessed higher permeability for C1-C7 hydrocarbons than for inorganic gases (excluding CO2), even after crosslinking. Permeability coefficients ranging from 140 to 1780 Barrer for He and CH 4 were found before crosslinking; the thermal crosslinking induced a nonlinear permeability decrease that could be correlated with the disappearance of the double bonds in the polymer structures, that is, cis-CH=CH-, trans-CH=CH-, and CH2=CH- in the side-chain position. According to the found properties, PVADMS could be used as a prospective material for the preparation of highly permeable selective membranes suitable for lower hydrocarbon and volatile organic compound recovery from various chemical and petrochemical process streams.
            """ ;
    dct:identifier "hal-00069292" ;
    dct:issued "2026-05-20T08:30:13.378785"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-05-20T08:30:13.378797"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Synthesis and permeability properties of crosslinkable elastomeric poly(vinyl allyl dimethylsilane)s" ;
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            vcard:fn "CCSD" ] ;
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    dcat:keyword "anionic-polymerization",
        "crosslinking",
        "gas-permeation",
        "infoeu-reposemanticsarticle",
        "infrared-spectroscopy",
        "journal-articles",
        "polysilanes",
        "spigprocengineering-sciences-physicschemical-and-process-engineering" ;
    dcat:landingPage <ISSN:%200021-8995> .

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    dct:issued "2026-05-20T08:30:13.408339"^^xsd:dateTime ;
    dct:modified "2026-05-20T08:30:13.332654"^^xsd:dateTime ;
    dct:title "Synthesis and permeability properties of crosslinkable elastomeric poly(vinyl allyl dimethylsilane)s" ;
    dcat:accessURL <https://hal.science/hal-00069292> .

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