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.

聚氯丁二烯（PCP）和氯磺化聚乙烯（CSM）橡胶经历了多步降解途径，其中涉及一个常见的脱氯化氢步骤，这导致大分子中的HCl释放出来，这一点已通过与操作FTIR分析相关的热重分析法得到了证明。CSM比PCP在较低的温度下检测到脱氯化氢。如热处理过程中析出相的化学分析所示，在此之前甚至会在更低的温度下进行非同时且非常独特的脱硫反应。掺入Bi ₂ O ₃，La ₂ O ₃和WO ₃作为无铅辐射防护材料的潜在填充剂，它们对这些橡胶的热稳定性产生不同的影响。尽管过渡金属氧化物不影响降解机理，但是氧化铋强烈促进脱氯化氢反应，导致橡胶的热稳定性降低，这不利于这些材料的潜在加工性和可回收性。