【摘要】 研究不同稳定体系对聚氯乙烯(PVC)的加工流变行为、力学性能和维卡软化点的影响,通过对比,评价复合稀土稳定剂的综合性能.结果表明,复合稀土稳定体系具有良好的综合加工性能,大大改善PVC材料的力学性能.扫描电镜及红外光谱分析证实,稀土热稳定剂具有偶联增韧作用;热分析结果表明,PVC-HREC(稀土稳定剂)体系在氮气中的热降解反应较为简单,为一步反应,通过外推得到其起始降解温度和终止降解温度分别为264.82,325.47℃.更多还原

【Abstract】 Influence of different thermal stabilization system of polyvinylchlorid(PVC) on the processing rheological properties,mechanical properties and vicat softening temperature were studied.The result indicates that compound rare-earth stabilization system has excellent whole processing property and could improve the mechanical properties evidently.The coupling effect of rare-earth stabilizer were investigated by SEM and FT-IR analysis.In addition,the result of DSC-TGA shows the thermal degradability of PVC-HREC system in N2 is one-step reaction.The initiative degraded temperature and final degraded temperature,obtained by extrapolation,are 264.82 ℃ and 325.47 ℃ respectively.更多还原