Home

Citation: SHENG TSE-CHUAN, GUNG CHUNG-YUAN, OUYANG CHUN. CATALYTIC ACTIVITY OF RARE EARTH COMPOUNDS IN THE STEREOSPECIFIC POLYMERIZATION Ⅱ. THE STEREOSPECIFIC POLYMERIZATION OF BUTADIENE WITH HOMOGENEOUS SYSTEMS COMPOSED OF CHELATES OF RARE EARTH ELEMENTS AND TRIALKYL ALUMINIUM[J]. Acta Polymerica Sinica, ;1965, 7(3): 193-200. shu

CATALYTIC ACTIVITY OF RARE EARTH COMPOUNDS IN THE STEREOSPECIFIC POLYMERIZATION Ⅱ. THE STEREOSPECIFIC POLYMERIZATION OF BUTADIENE WITH HOMOGENEOUS SYSTEMS COMPOSED OF CHELATES OF RARE EARTH ELEMENTS AND TRIALKYL ALUMINIUM

Received Date: 23 November 1964

The stereospecific polymerization of butadiene catalysed by homogeneous systems formed by combination of trialkyl aluminium with β-diketone chelates of rare earth ele-ments has been studied．It has been shown that combinations of the following rare earth chelates with triethyl aluminium could induce cis-1，4 stereospecific polymerization of butadiene： NdB3(B=benzoylacetonate)，NdB，NdBTA(BTA=benzoyltrifluoroacetonate)，NdTTA(TTA=thenoyltrifIuoroacetonate)，PrB3，PrB，PrBTA，PrTTA，YB3，YBTA，and LaBTA．These homogeneous systems appear to possess much higher catalytic activity than those of the heterogeneous systems formed by combination of triethyl aluminium with halides of lanthanons studied earlier．Up to a certain extent of catalyst concentration，the catalytic activities of these systems increase with increasing ratio of Al/chelate or chelate/butadiene (molar ratio)．The polymerization has an induction period and it is found that the rate of polymerization is of first order with respect to the monomer concentration and approximately of first order to the chelate concentration．With the NdB3-Al(C2H5)3 system．the activation energy of polymerization has been determined tO be 13.0±0.5 kcal/mole．Both polymerization rate and microstructure of polybutadiene depend upon the nature of the rare earth metal in the chelates rather than that of the ligands in various chelates，and the praseodymium and neodymium chelate systems gave higher catalytic activity．It is interesting tO note that polybutadienes obtained with these homo-geneous systems always have a 1，2-structure content less than 1％，with 1ittle or even no geI formation．The intrinsic viscosities of the polymers obtained varying from 4一5 to 1，depend on the Al/chelate and chelate/butadiene ratios．Variation in alkyl groups on the aluminium component results in a marked difference in catalytic activity．The Al(i-C4H9)3 system exhibits low activity and Al(C2H5)2Cl system is inactive．
1. [1]
  Yuanqing Wang , Yusong Pan , Hongwu Zhu , Yanlei Xiang , Rong Han , Run Huang , Chao Du , Chengling Pan . Enhanced Catalytic Activity of Bi₂WO₆ for Organic Pollutants Degradation under the Synergism between Advanced Oxidative Processes and Visible Light Irradiation. Acta Physico-Chimica Sinica, 2024, 40(4): 2304050-0. doi: 10.3866/PKU.WHXB202304050
2. [2]
  Xueqi Yang , Juntao Zhao , Jiawei Ye , Desen Zhou , Tingmin Di , Jun Zhang . 调节NNU-55(Fe)的d带中心以增强CO₂吸附和光催化活性. Acta Physico-Chimica Sinica, 2025, 41(7): 100074-0. doi: 10.1016/j.actphy.2025.100074
3. [3]
  Chi Li , Jichao Wan , Qiyu Long , Hui Lv , Ying Xiong . N-Heterocyclic Carbene (NHC)-Catalyzed Amidation of Aldehydes with Nitroso Compounds. University Chemistry, 2024, 39(5): 388-395. doi: 10.3866/PKU.DXHX202312016
4. [4]
  Linjie ZHU , Xufeng LIU . Synthesis, characterization and electrocatalytic hydrogen evolution of two di-iron complexes containing a phosphine ligand with a pendant amine. Chinese Journal of Inorganic Chemistry, 2025, 41(5): 939-947. doi: 10.11862/CJIC.20240416
5. [5]
  Shiqian WEI , Xinyu TIAN , Hong LIU , Maoxia CHEN , Fan TANG , Qiang FAN , Weifeng FAN , Yu HU . Oxygen reduction reaction/oxygen evolution reaction catalytic performances of different active sites on nitrogen-doped graphene loaded with iron single atoms. Chinese Journal of Inorganic Chemistry, 2025, 41(9): 1776-1788. doi: 10.11862/CJIC.20250102
6. [6]
  Yerong Chen , Bingbin Yang , Xinglei He , Yuqi Lin , Keyin Ye . Enzyme-Directed Evolution Enables Bioconversion of Organosilicon Compounds. University Chemistry, 2025, 40(10): 121-129. doi: 10.12461/PKU.DXHX202411054
7. [7]
  Feng Han , Fuxian Wan , Ying Li , Congcong Zhang , Yuanhong Zhang , Chengxia Miao . Comprehensive Organic Chemistry Experiment: Phosphotungstic Acid-Catalyzed Direct Conversion of Triphenylmethanol for the Synthesis of Oxime Ethers. University Chemistry, 2025, 40(3): 342-348. doi: 10.12461/PKU.DXHX202405181
8. [8]
  Jinfeng Chu , Lan Jin , Yu-Fei Song . Exploration and Practice of Flipped Classroom in Inorganic Chemistry Experiment: a Case Study on the Preparation of Inorganic Crystalline Compounds. University Chemistry, 2024, 39(2): 248-254. doi: 10.3866/PKU.DXHX202308016
9. [9]
  Aidang Lu , Yunting Liu , Yanjun Jiang . Comprehensive Organic Chemistry Experiment: Synthesis and Characterization of Triazolopyrimidine Compounds. University Chemistry, 2024, 39(8): 241-246. doi: 10.3866/PKU.DXHX202401029
10. [10]
  Yijing GU , Huan PANG , Rongmei ZHU . Applications of nickel-based metal-organic framework compounds in supercapacitors. Chinese Journal of Inorganic Chemistry, 2025, 41(10): 2029-2038. doi: 10.11862/CJIC.20250186
11. [11]
  Zhongxin YU , Wei SONG , Yang LIU , Yuxue DING , Fanhao MENG , Shuju WANG , Lixin YOU . Fluorescence sensing on chlortetracycline of a Zn-coordination polymer based on mixed ligands. Chinese Journal of Inorganic Chemistry, 2024, 40(12): 2415-2421. doi: 10.11862/CJIC.20240304
12. [12]
  Zhuoming Liang , Ming Chen , Zhiwen Zheng , Kai Chen . Multidimensional Studies on Ketone-Enol Tautomerism of 1,3-Diketones By ¹H NMR. University Chemistry, 2024, 39(7): 361-367. doi: 10.3866/PKU.DXHX202311029
13. [13]
  Xiao SANG , Qi LIU , Jianping LANG . Synthesis, structure, and fluorescence properties of Zn(Ⅱ) coordination polymers containing tetra-alkenylpyridine ligands. Chinese Journal of Inorganic Chemistry, 2024, 40(11): 2124-2132. doi: 10.11862/CJIC.20240158
14. [14]
  Geyang Song , Dong Xue , Gang Li . Recent Advances in Transition Metal-Catalyzed Synthesis of Anilines from Aryl Halides. University Chemistry, 2024, 39(2): 321-329. doi: 10.3866/PKU.DXHX202308030
15. [15]
  Nan Xiao , Fang Sun . 二芳基硫醚化合物的构建及应用. University Chemistry, 2025, 40(6): 360-363. doi: 10.12461/PKU.DXHX202407099
16. [16]
  Jianan Hong , Chenyu Xu , Yan Liu , Changqi Li , Menglin Wang , Yanwei Zhang . Decoding the interfacial competition between hydrogen evolution and CO₂ reduction via edge-active-site modulation in photothermal catalysis. Acta Physico-Chimica Sinica, 2025, 41(9): 100099-0. doi: 10.1016/j.actphy.2025.100099
17. [17]
  Ziyang Long , Quanzheng Li , Chengliang Zhang , Haifeng Shi . BiVO₄/WO_3-x S-scheme heterojunctions with amplified internal electric field for boosting photothermal-catalytic activity. Acta Physico-Chimica Sinica, 2025, 41(10): 100122-0. doi: 10.1016/j.actphy.2025.100122
18. [18]
  Ping ZHANG , Chenchen ZHAO , Xiaoyun CUI , Bing XIE , Yihan LIU , Haiyu LIN , Jiale ZHANG , Yu'nan CHEN . Preparation and adsorption-photocatalytic performance of ZnAl@layered double oxides. Chinese Journal of Inorganic Chemistry, 2024, 40(10): 1965-1974. doi: 10.11862/CJIC.20240014
19. [19]
  Hanmei Lü , Xin Chen , Qifu Sun , Ning Zhao , Xiangxin Guo . Uniform Garnet Nanoparticle Dispersion in Composite Polymer Electrolytes. Acta Physico-Chimica Sinica, 2024, 40(3): 2305016-0. doi: 10.3866/PKU.WHXB202305016
20. [20]
  Gengjia Chen , Junjie Ou . Application of the van Deemter Equation in Instrumental Analysis Teaching: A Case of Organic Polymer Monolithic Columns. University Chemistry, 2025, 40(11): 362-368. doi: 10.12461/PKU.DXHX202502003

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(250)
HTML views(1)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return