受阻酚类抗氧剂对聚乙烯抗热氧老化性能的影响  

EFFECTS OF HINDERED PHENOLIC ANTIOXIDANTS ON HEAT-OXYGEN AGE STABILITIES OF POLYETHYLENE

作　　者：王玉如 何书艳 王华[1] 吴薇 牛娜 Wang Yuru;He Shuyan;Wang Hua;Wu Wei;Niu Na(Daqing Petrochemical Research Center of Petrochina, Daqing 163714, Heilongjiang, China)

机构地区：[1]中国石油大庆化工研究中心,黑龙江大庆163714

出　　处：《精细石油化工》2021年第4期61-65,共5页Speciality Petrochemicals

摘　　要：以4种受阻酚类抗氧剂作为聚乙烯的防老化剂,通过测定聚乙烯的氧化诱导期和熔体流动速率对其抗热氧老化性能进行评价,同时对高温有氧水体系下加速老化后的聚乙烯进行氧化诱导期、力学性能以及羰基指数的测定,研究其长期抗热氧老化性能。结果表明,受阻酚类抗氧剂的抗热氧老化性能的顺序为抗氧剂1330>抗氧剂1010>抗氧剂3114>抗氧剂1024;在加速老化试验中,抗氧剂1330的长期老化性能最好,老化70 h后氧化诱导期仍为32.45 min,羰基指数仅上升至0.32;抗氧剂1010的性能最差,在老化56 h后氧化诱导期降低至0.45 min,羰基指数上升至0.87,聚乙烯材料脆化,丧失力学性能。Four hindered phenolic antioxidants were selected as anti-aging agents of polyethylene,and their heat-oxygen age stabilities were clarified by oxidative induction time(OIT)and melt flow rate(MFR).The long-term accelerated heat-oxygen age stabilities in deionized water pressurized with pure oxygen were also determined by OIT,tensile testing machine and carbonyl index.The results indicated that four hindered phenolic antioxidants led to an enhanced heat-oxygen age stabilities in an order of Irganox 1330>Irganox 1010>Irganox 3114>Irganox 1024.The study also displayed that long-term accelerated heat-oxygen age stabilities of Irganox 1330 was best,the OIT and CI were 32.45 min and 0.32 respectively after accelerated heat-oxygen aging for 70 h.While Irganox 1010 had the worst perform,the OIT of polyethylene was only 0.45 min,CI reached 0.87,and the embrittlement of polyethylene was severe after accelerated heat-oxygen aging for 56 h.

关 键 词：受阻酚类抗氧剂 聚乙烯 热氧老化 加速老化 

分 类 号：TQ216[化学工程—有机化工]