亚磷酸酯P-EPQ与受阻酚在聚丙烯中的协同抗氧作用研究  

Synergistic antioxidant effect of phosphonite P⁃EPQ and hindered phenol in polypropylene

作　　者：邵豪锋 焦隆杰 公维光[2] 孟鑫[1] SHAO Haofeng;JIAO Longjie;GONG Weiguang;MENG Xin(Shanghai Key Laboratory of Multiphase Materials Chemical Engineering,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;Research&Development Center for Sports Materials,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化工学院产品工程系,上海市多相结构材料化学工程重点实验室,上海200237 [2]华东理工大学体育新材料研发中心,上海200237

出　　处：《中国塑料》2024年第8期20-25,共6页China Plastics

摘　　要：采用氢过氧化物清除实验和热重分析对比研究了四(2,4-二叔丁基苯基)4,4′-联苯基二亚磷酸酯(Hostanox PEPQ)和三(2.4-二叔丁基苯基)亚磷酸酯(Irgafos 168)的抗氧化活性以及热稳定性能。结果显示:由于P-EPQ结构中含有更高的P含量以及特殊的P—C键,其表现出卓越的抗氧化性能和热稳定性。进而,选用受阻酚抗氧剂Irganox1010和Irganox 1076与P-EPQ进行复配,对其在等规聚丙烯(iPP)中的抗氧化协同作用进行探究。复配抗氧剂所稳定的iPP在多次挤出过程中熔体体积流动速率(MVR)和黄度指数(YI)变化以及氧气气氛中的氧化诱导期(OIT)比较结果表明:抗氧剂1010与P-EPQ复配展现出显著的协同效应。当1010与P-EPQ的质量比为6/4时,稳定的iPP具有最佳综合稳定性能。此时,抗氧改性样品第五次挤出后的MVR和YI仅为纯iPP的19.8%和79.9%,而180℃下的OIT则从0.8 min显著延长至74.8 min。Hydrogen peroxide clearance experiments and thermogravimetric analysis were conducted to compare the anti⁃oxidant activity and thermal stability of tetrakis(2,4⁃di⁃tert⁃butylphenyl)4,4′⁃biphenylene diphosphonate(Hostanox P⁃EPQ)and tris(2,4⁃di⁃tert⁃butylphenyl)phosphite(Irgafos 168).The results demonstrated that due to its higher phos⁃phorus content and unique P—C bond in the structure,P⁃EPQ exhibited superior antioxidant performance and thermal stability.Furthermore,hindered phenolic antioxidants Irganox 1010 and Irganox 1076 were selected to be compounded with P⁃EPQ to investigate their synergistic antioxidant effects in isotactic polypropylene(iPP).The comparison of chang⁃es in melt volume flow rate(MVR)and yellowing index(YI)during multiple extrusion,as well as the oxidation induc⁃tion period(OIT)in oxygen atmosphere of iPP stabilized by compound antioxidants indicated that the combination of an⁃tioxidant 1010 and P⁃EPQ exhibits a significant synergistic effect.When the mass ratio of 1010 to P⁃EPQ was 6/4,the stabilized iPP had the optimal overall stability performance.At this stage,the MVR and YI of antioxidant⁃modified sam⁃ple after the fifth extrusion were only 19.8%and 79.9%of pure iPP,while the OIT at 180℃significantly increased from 0.8 min to 74.8 min.

关 键 词：亚磷酸酯 抗氧化性能 聚丙烯 复配体系 协同效应 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]