以低密度聚乙烯(LDPE)/铁(或锡)的有机化合物/含氮有机物为降解体系,制成薄膜样品,于模拟堆肥环境中降解,跟踪取样,测定其粘均分子量及氢过氧化物浓度([POOH])变化,另外,进行了傅立叶变换红外(FT-IR)和差示扫描量热分析(DSC)测试.结果表明,所选用的某些体系能够在堆肥条件下高效降解,薄膜样品在降解60 d后分子量大幅度降低,羰基含量,结晶度呈现明显的增高趋势.降解程度受降解剂种类、配合剂种类及含量、降解环境等诸多因素影响.所测[POOH]变化趋势与分子量变化存在着关联性,这为降解机理的进一步讨论打下了基础.
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