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八配位β-二酮锆的质谱研究 被引量:1
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作者 梁泽斌 宗德萱 +2 位作者 施朝仁 李碧钦 柴璋 《北方工业大学学报》 1992年第1期11-16,共6页
本文研究了八配位乙酰丙酮合锆的质谱。就碎片离子讨论了乙酰丙酮合锆在质谱中气相裂分反应的途径。分解反应最终形成的含锆碎片是锆的氧化物ZrO_2H^+。用配体乙酰丙酮作溶剂,用连续流进样和控制样品去溶剂化的程度,获得乙酰丙酮合锆的... 本文研究了八配位乙酰丙酮合锆的质谱。就碎片离子讨论了乙酰丙酮合锆在质谱中气相裂分反应的途径。分解反应最终形成的含锆碎片是锆的氧化物ZrO_2H^+。用配体乙酰丙酮作溶剂,用连续流进样和控制样品去溶剂化的程度,获得乙酰丙酮合锆的分子离子。并简要介绍了八配位三氟乙酰丙酮合锆的质谱。 展开更多
关键词 β-二酮 质谱 分子离子
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β-二酮锆/AlEt2Cl/MAO催化乙烯原位共聚合成支化聚乙烯 被引量:1
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作者 胡文艳 杨敏 +3 位作者 赵辛 刘宾元 郝小宇 闫卫东 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2008年第2期430-432,共3页
A novel catalytic system to prepare branched polyethylene with single catalyst activated by two different co-catalysts is reported in this paper via the tandem catalysis,with ethylene as single monomer.Such catalytic ... A novel catalytic system to prepare branched polyethylene with single catalyst activated by two different co-catalysts is reported in this paper via the tandem catalysis,with ethylene as single monomer.Such catalytic system is composed of β-diketonate zirconium complexes,i.e.(acac)2ZrCl2(Ⅰ)and(dbm)2ZrCl2(Ⅱ)as catalyst precursors,diethylaluminium chloride(AlEt2Cl)as a co-catalyst for ethylene oligomerization and methylaluminoxane(MAO)as another one for the in situ copolymerization with ethylene.The oligomers obtained were mainly α-olefins,and the contents of them in weight were 76.84 for Ⅰ and 65.99 for Ⅱ,while the part being able to be copolymerized was 62.12 and 55.32 for Ⅰ and Ⅱ,respectively.The branched polyethylene via in situ copolymerization of ethylene was prepared by the tandem catalytic system Ⅰ/AlEt2Cl/MAO or Ⅱ/AlEt2Cl/MAO.13C NMR spectrum reveals that the resultant copolymer was branched polyethylene with total branches of 2.1/1000C,including ethyl group of 1.2/1000C,butyl group of 0.8/1000C and longer branches of 0.1/1000C.With increasing the molar ratio of AlEt2Cl to MAO,the melting temperature of the polymer obtained decreased from 133.7 to 116.7 ℃ for Ⅰ/AlEt2Cl/MAO and from 131.7 to 118.8 ℃ for Ⅱ/AlEt2Cl/MAO as well as the change of crystallinity.The catalytic activities for catalyst Ⅰ/AlEt2Cl/MAO and Ⅱ/AlEt2Cl/MAO were from 2.48×104 to 0.10×104 g PE/(mol Zr·h)and from 1.00×104 to 0.32×104 g PE/(mol Zr·h),respectively.The results indicate that the branched polyethylene can be obtained by such a catalytic system. 展开更多
关键词 乙烯原位共聚 支化聚乙烯 β-二酮配合物 一氯二乙基铝 甲基铝氧烷
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α,β-不饱和羰基锆化合物的合成及其在高选择合成中的应用
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作者 钟平 《温州师范学院学报》 2002年第6期31-34,共4页
由端炔和Cp2Zr(H)Cl(Cp=η5-C5H5)及CO反应,得到α,β-不饱和羰基锆化合物,进而与芳基硫 氯反应,合成了α,β-不饱和羧酸硫酯,产率中等至良好.
关键词 α β-不饱和羰基化合物 高选择合成 端炔 芳基硫氯 α β-不饱和羧酸硫酯 氢化反应 合成反应
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锆封头的冲压
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作者 李南 陈万申 《压力容器》 2004年第6期30-31,共2页
主要介绍锆封头制造过程中存在问题及解决方法 。
关键词 封头 相变 同素异构体 六方晶格 立方晶格 α- β-锆
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双功能催化剂体系催化乙烯原位聚合制备长链支化聚乙烯研究 被引量:12
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作者 柳忠阳 贾明 +2 位作者 郭存悦 贺大为 胡友良 《高分子学报》 SCIE CAS CSCD 北大核心 2001年第6期751-754,共4页
以蒙脱土负载 β 二酮二氯化锆作为乙烯齐聚催化剂与Et(Ind) 2 ZrCl2 复合组成了原位双功能聚合催化体系 ,成功地以乙烯为唯一单体唯一反应釜制备长链支化聚乙烯 ,该催化剂体系具有乙烯共聚活性高 。
关键词 双功能聚合体系 蒙脱土 负载β-二酮二氯化 催化剂 乙烯 原位聚合 长链支化聚乙烯
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SYNTHESIS AND REACTIONS OF BIS(β—ALKOXY—ETHYL CYCLOPENTADIENYL)TITANOUM(ZIRCONIUM)DICHLORIDES
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作者 WEIRongbao LIANGYa 等 《Chinese Journal of Reactive Polymers》 1992年第2期122-132,共11页
Bis(β-alkoxy-ethyl cyclopentadienyl) titanium (zirconium) dichlorides was newly synthe-sized,and through interfacial polycondensation of bis(β-alkoxy-ethyl cyclopentadienyl) titanium dichlorides with diacids,dipheno... Bis(β-alkoxy-ethyl cyclopentadienyl) titanium (zirconium) dichlorides was newly synthe-sized,and through interfacial polycondensation of bis(β-alkoxy-ethyl cyclopentadienyl) titanium dichlorides with diacids,diphenols,and hydroxy-acids,a series of new titanium polymers were prepared.The polymers obtained are yellow in color,having mol. wts between 10^3-10^6.They possess heat-resistant properties and show better solubilities that Carraher′s series.Thus,TG/DTG determinations showed that while suffering initial loss of wts. at around 260℃-470℃,they remain stable at 600-800℃.Residual wts.are around 50% of the initial at 947.5℃.They are soluble in glacial acetic acid,DMAC,DMF,and DMSO. 展开更多
关键词 合成反应 二氯化双(β-烷氧基-乙烷基茂基)钛 二氯化双(β-烷氧基-乙烷茂基)
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