摘要
以五甲基哌啶醇、对溴苯酰氯为原料合成了一种受阻胺抗氧稳定剂,通过Suzuki反应将其封端到聚(9,9-二辛基)芴上.通过核磁共振谱、凝胶渗透色谱对合成材料的分子结构进行了表征;并利用荧光发射光谱和退火方法,对其光谱热稳定性进行了细致研究.实验结果表明,当在聚芴分子链上引入受阻胺五甲基哌啶醇后,其荧光发射光谱的稳定性显著提高,绿光区发射现象明显减弱.
A novel hindered amine light stabilizer has been synthesized using 1,2,2,6,6-pentamethyl-4-piperidinol and 4-bromobenzoyl chloride as the raw materials,and has been utilized to end-cap the blue eleetrolumineseent poly- （9, 9＇-dioetylfluorene）. The chemical structure of the polymer has been characterized with nuclear magnetic resonance（^1 H-NMR） and gel permeation chromatograph （OPC）. Its thenno-stability was investigated by comparing the fluorescent spectra after annealing at elevated temperature in air. It clearly demonstrated that the light fluorescent spectroscopic stability of the polymer was greatly improved and the common phenomenon of greenish blue emission has been effectively restrained after end-capped with the hindered amine light stabilizer.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2007年第2期148-152,共5页
Acta Polymerica Sinica
基金
国家自然科学基金(基金号20428304
10476008)资助项目
关键词
聚芴
受阻胺
抗氧化
绿光发射
Polyfluorene, Hindered amine light stabilizer, Anti-oxidation, Green-emission
