期刊文献+

环烷酸钴-三异丁基铝-二硫化碳体系催化合成3,4-聚异戊二烯 被引量:2

Synthesis of 3,4-polyisoprene catalyzed with cobalt naphthenate-triisobutylaluminum-carbon disulfide
在线阅读 下载PDF
导出
摘要 采用配位聚合引发体系环烷酸钴(简称Co)-三异丁基铝(简称Al)-二硫化碳(CS2)引发异戊二烯聚合制得3,4-聚异戊二烯(PIp),考察了聚合条件对单体聚合活性的影响,通过凝胶渗透色谱、核磁共振氢谱和差示扫描量热法表征了3,4-PIp的相对分子质量及其分布、微观结构及玻璃化转变温度(Tg).结果表明,在Co/Ip(摩尔比)为4.0×10-4、Al/Co(摩尔比)为55~65、CS2/Co(摩尔比)为15、聚合温度为40 ~ 50℃的条件下合成了3,4-结构(含1,2-结构)摩尔分数约为80%的非结晶材料PIp,其数均分子量为3.4×104,分子量分布指数为1.8,Tg为-6.5℃. The 3,4-polyisoprene (PIp) was synthesized by liquid bulk polymerization of isoprene (Ip) with cobalt naphthenate(simplied as Co) /A1 (iBu)3 (simplied as Al) /CS2 catalytic systems,and the influence of process conditions on polymerization activity of monomer was investigated,and the relative molecular mass and its distribution,microstructure and glass-transition temperature (Tg) were characterized by gel permeation chromatography,1 H-nuclear magnetic resonance and differential scanning calorimetry.The results showed that under the optimum polymerization condition of Co/Ip (mole ratio) 4.0 × 10-4,Al/Co(mole ratio) 55-65,CS2/Co(mole ratio) 15 and 40-50 ℃,the 3,4-PIp with 80% mole fraction of 3,4-unit (including 1,2-unit) was obtained,the number-average molecular weight and its polydispersion index were 3.4 × 104,1.8 respectively,and Tg was-6.5℃.
出处 《合成橡胶工业》 CAS CSCD 北大核心 2013年第6期433-436,共4页 China Synthetic Rubber Industry
基金 国家自然科学基金资助项目(51273100)
关键词 环烷酸钴 三异丁基铝 二硫化碳 配位聚合 3 4-聚异戊二烯 催化效率 相对分子质量 微观结构 cobalt naphthenate triisobutylaluminum carbon disulfide coordination polymerization 3,4-polyisoprene catalytic efficiency relative molecular mass microstructure
作者简介 作者简介:陈冬梅(1972-),女,山东济南人,硕士研究生,高级工程师.从事橡塑材料合成与表征方面的研究,已发表论文10余篇,获青岛市科技进步一等奖1项. 通讯联系人。
  • 相关文献

参考文献13

二级参考文献52

  • 1胡雁鸣,董为民,姜连升,张学全.以亚磷酸二乙酯为第三组分的铁系催化体系催化异戊二烯聚合[J].合成橡胶工业,2004,27(6):344-347. 被引量:7
  • 2[1]Marwede G W,Stollfub B,Sumner A J M. Current status of tyre elastomers in Europe[J].Kaut u Gummi Kunstst,1993,46(5): 380~388
  • 3[2]Nordsiek K H,Wolpers J. High Tg polyisoprenes for superior wet grip of tire treads[J].Kaut u Gummi Kunstst,1990,43(9): 755~760
  • 4[3]Nordsiek K H. Special rubbers based on 1,2 and 3,4 polydienes[J]. Kaut u Gummi Kunstst,1982,35(12): 1 032~1 038
  • 5[5]Biryukova I I,Vishnitskii A S,Govorova O A,et al. Use of 3,4 polyisoprene to improve technological characteristics of rubber mixtures based on ethylene propylene rubbers[J]. Kauch Rezina,1995(4): 12~15
  • 6[6]Hsu W L,Halasa A F,Wetli T T. Novel ether modifiers for anionic polymerization of isoprene[J]. Rubb Chem Technol,1998,71(1): 62~69
  • 7[7]Halasa A F,Hsu W L.Synthesis of high vinyl elastomers via mixed organolithium and sodium alkoxide in the presence of polar modifier[J]. Polymer,2002,43(25): 7 111~7 118
  • 8[8]Swift H E,Bozik J E,Wu C Y. Specific catalysis with iron coordination complexes[J].J Catal,1970,17: 331~340
  • 9[10]Sato H,Tanaka Y. Distribution of isomeric structures in polyisoprenes[J]. Polymer,1977,18(6): 580~586
  • 10[11]Sato H,Tanaka Y. 1H NMR study of polyisoprenes[J]. J Polym Sci Polym,Part A 1, 1979,17(11): 3 551~3 558

共引文献36

同被引文献37

引证文献2

二级引证文献8

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部