新型改性Ziegler-Natta催化剂的制备及用于乙烯淤浆聚合
|
摘要
采用苯酚、2,4–二叔丁基苯酚和2,6–二叔丁基苯酚对传统钛系Ziegler-Natta催化剂进行改性,并进行了物性分析,考察了催化剂的均聚性能、氢调敏感性能、聚合动力学行为、乙烯与1–己烯以及乙烯与1–丁烯的共聚合性能。结果表明:通过酚类化合物改性后的催化剂钛含量较低,且比表面积较高,催化剂粒子呈类球形,径距更加集中,以2,6–二叔丁基苯酚改性的催化剂效果最佳。
Conventional Ziegler-Natta catalysts were modified with phenol,2,4-di-tert-butylphenol and2,6-di-tert-butylphenol. The physical properties of the catalysts were analyzed as well as the homopolymerization performance,hydrogen response ability,polymerization kinetics,copolymerization of ethylene and 1-butylene as well as copolymerization of ethylene and 1-hexene. It was found that the content of titanium in catalyst modified by phenol compounds is decreased,and the spherical catalysts have larger specific surface area and more centralized radius-center distance ratio. The catalyst modified by 2,6-di-tert-butylphenol performs best.
Conventional Ziegler-Natta catalysts were modified with phenol,2,4-di-tert-butylphenol and2,6-di-tert-butylphenol. The physical properties of the catalysts were analyzed as well as the homopolymerization performance,hydrogen response ability,polymerization kinetics,copolymerization of ethylene and 1-butylene as well as copolymerization of ethylene and 1-hexene. It was found that the content of titanium in catalyst modified by phenol compounds is decreased,and the spherical catalysts have larger specific surface area and more centralized radius-center distance ratio. The catalyst modified by 2,6-di-tert-butylphenol performs best.
引文
[1]王世波,刘东兵,毛炳权.烯烃聚合五十年[J].化工进展,2005,24(5):455-463.
[2]王红秋.世界聚乙烯技术的最新进展[J].中外能源,2008,13(5):83-86.
[3]郭子方,张敬梅,陈伟,等.新型高效淤浆工艺聚乙烯催化剂的制备及其催化性能[J].石油化工,2005,34(9):840-843.
[4]宋立新,卢春华,谷海峰.国内外聚乙烯生产现状及市场分析[J].弹性体,2011,21(6):77-82.
[5]李兵.高密度聚乙烯技术进展[J].当代化工,2006,35(5):322-325.
[6]姜涛,许芳,董鹏,等.α,ω-链端功能化聚烯烃的设计与合成新进展[J].天津科技大学学报,2016,31(3):1-10.
[7]姜涛,陈美超,邵怀启.双(正丁基环戊二烯基)二氯化锆/甲基铝氧烷催化1-丁烯齐聚[J].天津科技大学学报,2013,28(3):20-24.
[8]Kunii D,Levenspiel O.Fluidization Engineering[M].New York:Wiley,1969:105-106.
[9]肖士镜,余赋生.烯烃配位聚合催化剂及聚烯烃[M].北京:北京工业大学出版社,2002:122.
[2]王红秋.世界聚乙烯技术的最新进展[J].中外能源,2008,13(5):83-86.
[3]郭子方,张敬梅,陈伟,等.新型高效淤浆工艺聚乙烯催化剂的制备及其催化性能[J].石油化工,2005,34(9):840-843.
[4]宋立新,卢春华,谷海峰.国内外聚乙烯生产现状及市场分析[J].弹性体,2011,21(6):77-82.
[5]李兵.高密度聚乙烯技术进展[J].当代化工,2006,35(5):322-325.
[6]姜涛,许芳,董鹏,等.α,ω-链端功能化聚烯烃的设计与合成新进展[J].天津科技大学学报,2016,31(3):1-10.
[7]姜涛,陈美超,邵怀启.双(正丁基环戊二烯基)二氯化锆/甲基铝氧烷催化1-丁烯齐聚[J].天津科技大学学报,2013,28(3):20-24.
[8]Kunii D,Levenspiel O.Fluidization Engineering[M].New York:Wiley,1969:105-106.
[9]肖士镜,余赋生.烯烃配位聚合催化剂及聚烯烃[M].北京:北京工业大学出版社,2002:122.