摘要
采用以配体为中心的催化剂设计理念,设计并合成了一种新型Ti系FI催化剂双[N-(3-叔丁基水杨醛)-2,6-二氟苯胺-4-苯乙烯基苯胺]二氯化钛(IV)(2F-BSFI)。采用核磁氢谱(1H-NMR)、核磁碳谱(13C-NMR)和傅里叶红外(FTIR)对催化剂配体N-(3-叔丁基水杨醛)-2,6-二氟苯胺-4-苯乙烯基苯胺(2F-BS)进行了表征。用1H-NMR、13C-NMR、元素分析(EA)和电喷雾电离质谱(ESI-MS)表征了催化剂结构。以2F-BSFI和助催化剂甲基铝氧烷(2F-BSFI/d-MAO)为催化体系催化乙烯聚合,考察了聚合时间、温度、助催化剂用量对催化性能的影响。结果表明,随着聚合时间的增加,产物分子量分布指数(PDI)稳定在较低水平,产物数均分子量Mn几乎呈线性增长,说明该催化剂催化乙烯聚合具有拟活性聚合特征。
Based on the ligand design-oriented research idea, a new FI-Ti complex bis[N-（3-tert-butyl salicylidene）-2,6-difluoro-4-styrylanilinato]titanium （IV） dichloride（2F-BSFI） was designed and synthesized as catalyst for living polymerization of ethylene. The ligand N-（3-tert-butyl salicylidene）-2,6-difluoro-4-styrylaniline（2F-BS） was characterized by 1H Nuclear Magnetic Resonance （1H-NMR）, 13C-NMR and Fourier Transform Infrared Spectroscopy （FTIR）. 2F-BSFI was characterized by 1H-NMR, 13C-NMR, Elemental Analysis （EA） and Electrospray Ionization Mass Spectrometry （ESI-MS）. The effects of temperature, time and amount of cocatalyst on the polymerization behavior of 2F-BSFI/d-MAO was studied. With the increase of polymerization time, the product polydispersity index （PDI） stabilized at a low level and Number Average Molecular Weight （Mn） of the product almost kept a liner growth, indicating that the catalyst has a“living”polymerization characteristic in ethylene polymerization.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2014年第2期163-168,共6页
Chemical Reaction Engineering and Technology
基金
高等学校博士学科点专项科研基金资助项目(20100101110041)
关键词
FI催化剂
活性聚合
聚烯烃
FI catalyst
living polymerization
polyolefin
