废塑料热解聚乙烯蜡的羧基化改性和表征

Carboxylation and characterization of polyethylene wax from waste plastics by pyrolysis

以废弃聚乙烯塑料热解得到的粗蜡为原料,用溶液催化氧化法制备了羧基化改性的氧化聚乙烯蜡,考察了催化剂种类和用量、引发剂用量、反应时间、反应温度对产物酸值的影响。结果表明,在催化剂加入量为1%、引发剂用量为10%、反应时间为8 h、反应温度为90℃的条件下,可制得酸值为16.26 mg KOH/g和16.17 mg KOH/g的氧化蜡。利用红外光谱和热重分析对产品进行表征。

Selecting crude wax from Pyrolysis of waste Polyethylene as raw material. Oxidized Polyethylene wax were PrePared by solution catalytic oxidation,the effects of the sPecies and amount of catalyst,the amount of initiator,oxidation time and temPerature on acid value were investigated. The results showed that the oPtimum conditions for oxidized the wax were：catalyst content 1%,initiator content 10%,reac-tion time were 8 h,reaction temPerature was 90 ℃. With these conditions,the oxidized waxes,the acid number of which is 16. 26 mgKOH/g and 16. 17 mg KOH/g,could be obtained. The Products were char-acterized with IR and TG.