caa a22 4500 46319201X CHVBK 20180406164912.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10973-006-8367-7 doi (NATIONALLICENCE)springer-10.1007/s10973-006-8367-7 Stability of vinylidene chloride copolymers containing 4-vinylpyridine units [Elektronische Daten] Thermogravimetric assessment [B. Howell, Adeyinka Odelana] Vinylidene chloride copolymers are prominent in the barrier plastic packaging industry. These materials display excellent barrier to the transport of oxygen (and other small molecules) as well as flavor and aroma molecules. However, they suffer from a propensity to undergo degradative dehydrochlorination at process temperatures. To scavenge hydrogen chloride formed and prevent its interaction with the metallic components of process equipment, a passive base is usually included as an additive prior to processing. The base is most often an inorganic oxide or salt. These may negatively impact the properties of the polymer, particularly as a film. An organic base that could be covalently incorporated into the copolymer might display better behavior. Accordingly, a series of copolymers containing low levels of 4-vinylpyridine (0.05-3 mole%) have been prepared, characterized, and examined by thermogravimetry to assess thermal stability. In all cases, polymers containing 4-vinylpyridine units are less stable than the polymer containing none of this comonomer. Clearly, the pyridine moiety is a sufficiently strong base to promote E2 elimination of hydrogen chloride to generate dichlormethylene units in the mainchain from which thermal degradation may be initiated. Springer Science+Business Media LLC, 2007 plastic packaging nationallicence thermogravimetry nationallicence vinylidene chloride copolymers nationallicence Howell B. Center for Applications in Polymer Science, Central Michigan University, 48859-0001, Mt. Pleasant, MI, USA aut Odelana Adeyinka Center for Applications in Polymer Science, Central Michigan University, 48859-0001, Mt. Pleasant, MI, USA aut Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 449-452 1388-6150 89:2<449 2007 89 10973 https://doi.org/10.1007/s10973-006-8367-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-8367-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Howell B. Center for Applications in Polymer Science, Central Michigan University, 48859-0001, Mt. Pleasant, MI, USA aut NATIONALLICENCE 700 1- Odelana Adeyinka Center for Applications in Polymer Science, Central Michigan University, 48859-0001, Mt. Pleasant, MI, USA aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 449-452 1388-6150 89:2<449 2007 89 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer