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用差示扫描量热仪(DSC)和热失重分析仪(TGA)研究了线性低密度聚乙烯(LLDPE)/对叔丁基杯[6]芳烃共混物的热性能。DSC结果显示,在空气氛围中,纯LLDPE和LLDPE/对叔丁基杯[6]芳烃共混物的热降解温度分别是205℃和250℃。TGA研究表明,对叔丁基杯[6]芳烃使LLDPE的热氧化降解温度提高30℃。上述结果说明,对叔丁基杯[6]芳烃能大大提高LLDPE的热性能,这主要是由于对叔丁基杯[6]芳烃能够提供-OH反应性基团,其氢原子具有相当的活性,能够与LLDPE热分解生成的活性游离基反应生成氢过氧化物,而自身生成了较为稳定的游离基,从而终止了游离基链的传递和增长。
The thermal properties of linear low density polyethylene (LLDPE) / p-tert-butylcalix [6] arene blends were investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) DSC results showed that the thermal degradation temperatures of pure LLDPE and LLDPE / p-tert-butylcalix [6] arene blends were 205 ° C and 250 ° C, respectively, in the air. TGA study showed that p-tert-butylcalix [6] arene increases the thermal oxidative degradation temperature of LLDPE by 30 ℃. The above results indicate that p-tert-butylcalix [6] arene can greatly improve the thermal properties of LLDPE, mainly due to the p-tert-butylcalix [6] arene that can provide -OH reactive groups, , Which can react with the active radicals generated by the thermal decomposition of LLDPE to generate hydroperoxides and generate more stable free radicals by itself, thus terminating the transfer and growth of the free radical chains.