Advanced Search

Citation: SHIEH HONG-CHUAN, LI PING-SUNG. TITANIUM TETRABROMIDE AS CATALYST FOR STEREOSPECIFIC POLYMERIZATION OF BUTADIENE[J]. Acta Polymerica Sinica, ;1964, 6(1): 48-54. shu

TITANIUM TETRABROMIDE AS CATALYST FOR STEREOSPECIFIC POLYMERIZATION OF BUTADIENE

  • The polymerization of butadiene catalysed by the TiBr4-i-Bu3A1，TiBr4-Et3A1，and TiBr4-BuLi systems has been studied．In the catalyst system of TiBr4-i-Bu3Al with ben-zene as solvent there are two molar ratios of i-Bu3Al to TiBr4，which exhibit maximum catalytic activity．The geI content，molecular weight and cis-1，4-content of the soluble part of the polymer decrease with increase of the i-Bu3Al／TiBr4 ratio．The atalytic ac-tivity seems to be greater，when the monomer is first mixed with i-Bu3Al than first with TiBr4．The maximum activity appears to move towards greater i-Bu3Al／TiBr4 ratio，when the polymerization temperature is lowered． If heptane is used as solvent．the rate of polymerization is reduced and only one catalyst ratio exhibits maximum activity．The gel content，molecular weight and cis-1，4-content of the soluble part of the polymer oh-tained all seem to be lower． If triethyl aluminium is used instead of triisobutyl alumi-nium．there are also two catalyst ratios exhibiting maximum activity． When the tem-perature of polymerization is lower the catalytic activity of the Et3Al-TiBr4 system seems to be greater than that of the i-Bu3Al-TiBr4 system．The products obtained from both systems appear very alike．They consist of a large amount of gel and the cis-1，4-content of the soluble part of the polymer iS below 70％．Catalysed by a new catalytic syscem-the BuLi-TiBr4 system butadiene can be polymerized to a product containing the cis-1，4-form higher than 90％． Catalytic activity was observed for BuLi／TiBr4 with molar ratios of 1.5—2.5．The cis-4-content of the product becomes smaller，when the catalyst ratio is greater．The valence states of the titanium existing in the above three catalytic sys-tems have been compared．When the metal alkyl to titanium tetrabromide ratio is lower than 2．the trivalent titanium increases with increase of catalyst ratio． When the catalyst ratio is higher than 2, the trivalent titanium decreases with increase of catalyst ratio in the BuLi／TiBr4 system，while in th eI other two systems the trivalent titanium still in-creases till 100％． It is interesting to note that the catalytic activity of the BuLi—TiBr4 system lies just between the range of catalyst ratios Which possess higher content of trivalent titanium．
  • 加载中
  • 加载中
    1. [1]

      Mengfan Gong ,  Dongju Zhang . Estimating Delocalization Energies of 1,3-Butadiene and Benzene with Isodesmic Reactions: A Relatively Precise Approach. University Chemistry, 2026, 41(4): 457-463. doi: 10.12461/PKU.DXHX202505036

    2. [2]

      Hailang JIA , Yujie LU , Pengcheng JI . Preparation and properties of nitrogen and phosphorus co-doped graphene carbon aerogel supported ruthenium electrocatalyst for hydrogen evolution reaction. Chinese Journal of Inorganic Chemistry, 2025, 41(11): 2327-2336. doi: 10.11862/CJIC.20250021

    3. [3]

      Xiaoyang Li ,  Xiaowei Huang ,  Yimeng Zhang ,  Huan Liu ,  Shao Jin ,  Junpeng Zhuang . Comprehensive Chemical Experiments on the Synthesis of 1,3-Dibromo-5,5-Dimethylhydantoin and Its Application as a Brominating Reagent. University Chemistry, 2025, 40(7): 286-293. doi: 10.12461/PKU.DXHX202408035

    4. [4]

      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

    5. [5]

      Hailang JIA , Pengcheng JI , Hongcheng LI . Preparation and performance of nickel doped ruthenium dioxide electrocatalyst for oxygen evolution. Chinese Journal of Inorganic Chemistry, 2025, 41(8): 1632-1640. doi: 10.11862/CJIC.20240398

    6. [6]

      Jiayi Yang ,  Jianxiu Hao ,  Huacong Zhou ,  Quansheng Liu . “Gorgeous Transformation” of Carbon Dioxide into Cyclic Carbonates: Catalyst Types and Roles. University Chemistry, 2026, 41(2): 178-189. doi: 10.12461/PKU.DXHX202502105

    7. [7]

      Botao QU , Qian WANG , Qian WANG , Ruiping ZHANG . Synthesis, crystal structures, and luminescence properties of zinc coordination polymers based on 2,5-dibromoterephthalate. Chinese Journal of Inorganic Chemistry, 2026, 42(5): 917-924. doi: 10.11862/CJIC.20260357

    8. [8]

      Lu Zhuoran , Li Shengkai , Lu Yuxuan , Wang Shuangyin , Zou Yuqin . Cleavage of C―C Bonds for Biomass Upgrading on Transition Metal Electrocatalysts. Acta Physico-Chimica Sinica, 2024, 40(4): 2306003-0. doi: 10.3866/PKU.WHXB202306003

    9. [9]

      Jiahui YU , Jixian DONG , Yutong ZHAO , Fuping ZHAO , Bo GE , Xipeng PU , Dafeng ZHANG . The morphology control and full-spectrum photodegradation tetracycline performance of microwave-hydrothermal synthesized BiVO4:Yb3+,Er3+ photocatalyst. Journal of Fuel Chemistry and Technology, 2025, 53(3): 348-359. doi: 10.1016/S1872-5813(24)60514-1

    10. [10]

      Ning CHEN , Jingle CHEN , Hongyuan ZHU , Huali CHEN , Liguang WU , Ting WANG . Mechanism and performance regulation of Co/Zr-doped mesoporous TiO2 catalysts in activating sodium persulfate for tetracycline degradation. Chinese Journal of Inorganic Chemistry, 2026, 42(3): 507-518. doi: 10.11862/CJIC.20250275

    11. [11]

      Bing WEI , Jianfan ZHANG , Zhe CHEN . Research progress in fine tuning of bimetallic nanocatalysts for electrocatalytic carbon dioxide reduction. Chinese Journal of Inorganic Chemistry, 2025, 41(3): 425-439. doi: 10.11862/CJIC.20240201

    12. [12]

      Leiduan Hao ,  Zhenyu Sun . Case-based practice for cultivating scientific thinking in science and engineering education: a case of fundamentals of catalytic chemistry. University Chemistry, 2026, 41(4): 216-221. doi: 10.12461/PKU.DXHX202507105

    13. [13]

      Wenwen Ma ,  Lian Kong ,  Jinyang Chu ,  Li Ma ,  Ziqing Ma ,  Heyu Cheng ,  Xinyuan Li ,  Zhan Yu ,  Zhen Zhao . Digitalization-Driven Olefin Production: Digital Design of Catalysts for CO2-Assisted Oxidation Dehydrogenation of Ethane to Ethylene. University Chemistry, 2026, 41(1): 363-372. doi: 10.12461/PKU.DXHX202506055

    14. [14]

      Juntao Yan , Liang Wei . 2D S-Scheme Heterojunction Photocatalyst. Acta Physico-Chimica Sinica, 2024, 40(10): 2312024-0. doi: 10.3866/PKU.WHXB202312024

    15. [15]

      Lewang Yuan , Yaoyao Peng , Zong-Jie Guan , Yu Fang . Insights into the development of 2D covalent organic frameworks as photocatalysts in organic synthesis. Acta Physico-Chimica Sinica, 2025, 41(8): 100086-0. doi: 10.1016/j.actphy.2025.100086

    16. [16]

      Limin Zhao , Kaiqiang Xu , Chuanbiao Bie . 2D COF photocatalyst with highly stabilized tautomeric transition and singlet oxygen generation. Acta Physico-Chimica Sinica, 2026, 42(4): 100216-0. doi: 10.1016/j.actphy.2025.100216

    17. [17]

      Lina Guo , Ruizhe Li , Chuang Sun , Xiaoli Luo , Yiqiu Shi , Hong Yuan , Shuxin Ouyang , Tierui Zhang . Effect of Interlayer Anions in Layered Double Hydroxides on the Photothermocatalytic CO2 Methanation of Derived Ni-Al2O3 Catalysts. Acta Physico-Chimica Sinica, 2025, 41(1): 100002-0. doi: 10.3866/PKU.WHXB202309002

    18. [18]

      Zhiquan Zhang , Baker Rhimi , Zheyang Liu , Min Zhou , Guowei Deng , Wei Wei , Liang Mao , Huaming Li , Zhifeng Jiang . Insights into the Development of Copper-Based Photocatalysts for CO2 Conversion. Acta Physico-Chimica Sinica, 2024, 40(12): 2406029-0. doi: 10.3866/PKU.WHXB202406029

    19. [19]

      Dong Xiang , Kunzhen Li , Kanghua Miao , Ran Long , Yujie Xiong , Xiongwu Kang . Amine-Functionalized Copper Catalysts: Hydrogen Bonding Mediated Electrochemical CO2 Reduction to C2 Products and Superior Rechargeable Zn-CO2 Battery Performance. Acta Physico-Chimica Sinica, 2024, 40(8): 2308027-0. doi: 10.3866/PKU.WHXB202308027

    20. [20]

      Xueting Feng , Ziang Shang , Rong Qin , Yunhu Han . Advances in Single-Atom Catalysts for Electrocatalytic CO2 Reduction. Acta Physico-Chimica Sinica, 2024, 40(4): 2305005-0. doi: 10.3866/PKU.WHXB202305005

Get Citation
PDF
XML
Metrics
  • PDF Downloads(0)
  • Abstract views(325)
  • HTML views(7)

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

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索
Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888
Powered By info@rhhz.net

/

DownLoad:  Full-Size Img  PowerPoint
Return