氢化腰果酚-含氮杂环抗氧剂在聚丙烯中的应用  

Application of Hydrogenated Cardanol-Nitrogen Heterocyclic Antioxidants in Polypropylene

作　　者：何雨霖 曾雪梅 向本好 夏霜 冯建湘 刘跃军[1,2] 夏勇 石璞[1,2] 刘祥贵 He Yulin;Zeng Xuemei;Xiang Benhao;Xia Shuang;Feng Jianxiang;Liu Yuejun;Xia Yong;Shi Pu;Liu Xianggui(School of Packaging&Materials Engineering,Hunan University of Technology,Zhuzhou 412007,China;Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province,Hunan University of Technology,Zhuzhou 412007,China;Guangdong Huatong New Material Technology Co.,Ltd.,Dongguan 523591,China)

机构地区：[1]湖南工业大学包装与材料工程学院,湖南株洲412007 [2]湖南工业大学先进包装材料与技术重点实验室,湖南株洲412007 [3]广东华通新材料科技有限公司,广东东莞523591

出　　处：《工程塑料应用》2023年第10期140-147,共8页Engineering Plastics Application

基　　金：国家自然科学基金项目(51805524);湖南省教育厅科学研究项目(19B163)。

摘　　要：为了部分替代聚丙烯(PP)中以石油基原料合成的抗氧剂,满足绿色、可再生、高效、低毒的发展要求,通过测试PP热氧稳定性、起始氧化温度以及热氧和光氧老化后力学性能、结构的变化,研究了生物基氢化腰果酚-2-氨基苯并恶唑(BAO1)、氢化腰果酚-5-氨基-2-苯并咪唑啉酮(BAO2)、氢化腰果酚-2-氨基苯并咪唑(BAO3)、氢化腰果酚-2-氨基苯并噻唑(BAO4)抗氧剂(BAO1~4)对PP耐热氧性能和光氧稳定性能的影响。结果表明,添加BAO2和BAO3均能提高PP的热氧稳定性,在PP成型加工时BAO2和BAO3能更大程度延缓PP熔体黏度下降,添加BAO2~4后,PP的起始氧化温度比纯PP提高了14~23℃。BAO3延缓PP热氧和光氧老化的效果最好,经热氧老化144 h和光氧老化48 h后PP-BAO3的断裂伸长保留率仍有26.1%和69.1%,而纯PP已完全老化失效。与氢化腰果酚和2-氨基苯并咪唑的物理共混相比,BAO3在提高PP热氧稳定性和光氧稳定性方面效率更高,表明BAO3同一个分子中Ar—OH与—NH—之间的协同抗氧效率高于物理共混形成的抗氧协同作用,具有分子内协同作用,在PP中具有更好的热氧稳定和光氧稳定作用。To partially replace the antioxidant synthesized from petroleum-based raw materials in polypropylene(PP),meeting the development requirements of green,renewable,high efficiency and low toxicity,the effects of bio-based hydrogenated cardanol-2-amino-benzoxazole(BAO1),hydrogenated cardanol-5-amino-2-benzimidazolone(BAO2),hydrogenated cardanol-2-aminobenzimidazole(BAO3),hydrogenated cardanol-2-amino-benzothiazole(BAO4)antioxidants on thermo-oxidative and photooxidative stability of polypropylene(PP)were studied by testing the thermal oxygen stability,initial oxidation temperature,the changes of mechanical properties and structure after thermo-oxidative and photo-oxidative aging of PP materials.The results show that the thermo-oxidative stability of PP can be improved by adding BAO2 and BAO3.The melt viscosity decrease of PP is delayed to a greater extent by BAO2 and BAO3 during the forming process.After adding BAO2-4,the initial oxidation temperatures of PP are increased by 14-23℃compared with that of pure PP.BAO3 has the best effect on delaying thermo-oxidative and photooxidative aging of PP,presenting that the retention of elongation at break of PP/BAO3 are 26.1%and 69.1%after 144 h thermooxidative aging and 48 h photo-oxidative aging,while the complete aging failure of pure PP occurs.Compared with the physical blends of hydrogenated cardanol and 2-aminobenzimidazole,BAO3 has higher efficiency in improving thermo-oxidative and photooxygen resistant aging abilities of PP,indicating that the synergistic antioxidant efficiency between Ar—OH and—NH—in the same molecule of BAO3 is higher than the antioxidant synergistic effect formed by physical blends.BAO3 has an intramolecular synergy and better thermo-oxidative and photo-oxidative stabilizing effects in PP.

关 键 词：聚丙烯 氢化腰果酚基抗氧剂 热氧稳定性能 光氧稳定性能 分子内协同 

分 类 号：TQ311[化学工程—高聚物工业]