基于体积排除色谱实验结果,详细分析了聚磷酸铵、硫酸铵、合成分子筛Y改性的聚苯乙烯在塑化混合过程和热降解过程中分子量及其分布的变化规律.由降解特性参数推断出在聚苯乙烯热降解时,这些添加剂都促进形成一定表面层,但作用明显不同.
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