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Article Dans Une Revue Polymer Degradation and Stability Année : 2019

Effect of metal oxides on the thermal degradation of polychloroprene and chlorosulfonated polyethylene

Résumé

Polychloroprene (PCP) and chlorosulfonated polyethylene (CSM) rubbers undergo a multiple step degradation pathway involving a common dehydrochlorination step which causes HCl release from the macromolecules as evidenced by thermogravimetric analyses associated with operando FTIR analyses. Dehydrochlorination is detected at lower temperatures for CSM than for PCP. It is preceded by non simultaneous and very distinctive desulfonation reaction at even lower temperatures as shown by chemical analyses of the evolved phase during a thermal treatment. Incorporation of Bi2O3, La2O3 and WO3 as potential fillers for lead-free radioprotective materials leads to diverse effect on the thermal stability of these rubbers. Whereas transition metal oxides do not affect the degradation mechanisms, bismuth oxide strongly promotes the dehydrochlorination reaction leading to a decrease of the rubbers thermal stability which is detrimental to the potential processability and recyclability of these materials.
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Dates et versions

hal-02051682 , version 1 (27-02-2019)

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Bidur Rijal, Florian Klipfel, Isabelle Dez, Jean Colin, Philippe Bazin, et al.. Effect of metal oxides on the thermal degradation of polychloroprene and chlorosulfonated polyethylene. Polymer Degradation and Stability, 2019, 159, pp.90-97. ⟨10.1016/j.polymdegradstab.2018.11.015⟩. ⟨hal-02051682⟩
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