插层结构抗氧剂对聚丙烯热氧稳定性的影响
Effect of Intercalated Structure Antioxidant on Thermal Oxygen Stability of Polypropylene
白弈青 1徐萌 1徐凯 1高达利 1孙小东 2冯拥军2
作者信息
- 1. 中石化(北京)化工研究院有限公司,北京,100013
- 2. 北京化工大学,北京,100029
- 折叠
摘要
将 2 种层状复合金属氢氧化物插层结构抗氧剂采用双螺杆挤出工艺,按照一定比例添加到聚丙烯(PP)中,得到无机-有机聚合物复合材料样品,然后采用X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FTIR)表征了抗氧剂水滑石的结构,通过氧化诱导时间(OIT)和热重(TG)分析考察新型抗氧剂对 PP 热氧稳定性的影响,并考察了抗氧剂耐溶剂迁移的效果.结果表明:插层结构抗氧剂的加入可以提升PP的抗热氧老化性能,其中Mg-Al抗氧剂的 OIT更长,Zn-Al抗氧剂对PP热稳定性的提升作用更明显,与抗氧剂 1010 相比,插层结构抗氧剂经乙醇和正己烷浸泡后表现出的耐迁移性效果更好.
Abstract
Two layered composite metal hydroxides with intercalated structure antioxidants were added to polypropylene(PP)in a certain proportion using a twin-screw extrusion process to obtain inorganic-organic polymer composite material samples.The structure of the antioxidant hydrotalcite was characterized by X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FTIR).The effect of new antioxidants on the thermal oxidative stability of PP was investigated through oxidation induction time(OIT)and thermogravimetric(TG)analysis,and the effect of antioxidants on solvent migration resistance was also investigated.The results show that the addition of intercalated antioxidant can improve the thermal oxidative aging resistance of PP,and OIT of Mg-Al antioxidant is longer,Zn-Al antioxidant has a more significant effect on improving the thermal stability of PP.Compared with antioxidant 1010,intercalated structure antioxidants exhibit better migration resistance after soaking in ethanol and n-hexane.
关键词
聚丙烯/层状复合金属氢氧化物/抗氧剂/热氧稳定性Key words
polypropylene/layered composite metal hydroxides/antioxidant/thermal oxygen stability引用本文复制引用
出版年
2024
NETL
NSTL
万方数据