高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (5): 20240542.doi: 10.7503/cjcu20240542

• 高分子化学 • 上一篇    下一篇

含磷/氮给电子体铁系催化剂催化1,3-双烯烃定向聚合

徐世亮, 赵英男, 余尧, 那丽华, 房梁, 刘恒, 张春雨(), 张学全   

  1. 青岛科技大学高分子科学与工程学院, 橡塑材料与工程教育部重点实验室/山东省橡塑材料与 工程重点实验室, 先进橡胶材料教育部重点实验室, 青岛 266042
  • 收稿日期:2024-12-16 出版日期:2025-05-10 发布日期:2025-03-18
  • 通讯作者: 张春雨 E-mail:cyzhang@qust.edu.cn
  • 基金资助:
    国家重点研发计划项目(2022YFB3704700)

Stereospecific Polymerization of 1,3-Dienes Catalyzed by Fe-based Catalysts with P/N Electron Donors

XU Shiliang, ZHAO Yingnan, YU Yao, NA Lihua, FANG Liang, LIU Heng, ZHANG Chunyu(), ZHANG Xuequan   

  1. Key Lab of Rubber?Plastics,Ministry of Education/Shandong Provincial Key Laboratory of Rubber and Plastics,Key Laboratory of Advanced Rubber Material,Ministry of Education,School of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China
  • Received:2024-12-16 Online:2025-05-10 Published:2025-03-18
  • Contact: ZHANG Chunyu E-mail:cyzhang@qust.edu.cn
  • Supported by:
    the National Key Research and Development Program of China(2022YFB3704700)

摘要:

考察了不同含磷/氮化合物对乙酰丙酮铁(Ⅲ)/烷基铝[Fe(acac)3/AlR3]体系催化1,3-丁二烯和异戊二烯 聚合的影响. 研究结果表明, 采用异氰亚氨基三苯基膦(IITP)作为给电子体的铁系催化剂可在己烷溶剂中高 活性地合成间同1,2-聚丁二烯(PBd)和3,4-聚异戊二烯(PIp), 催化活性最高可达1.52×106 gPBd/molFe和1.47×106 gPIp/molFe. 所得聚丁二烯具有较低的熔点(Tm, 64.0~115.0 ℃), 1,2-单元摩尔分数最高可达80.2%; 而聚异戊二烯则呈现中等的3,4-单元摩尔分数(48.8%~52.4%), 玻璃化转变温度(Tg)在-18.5 ℃~-15.8 ℃之间. 聚合物的高温凝胶渗透色谱(HTGPC)曲线呈单峰分布, 证明催化剂为单活性中心. 此外, 通过异戊二烯的动力学实验和种子聚合实验证明该催化体系具备准活性聚合特征.

关键词: 配位聚合, 共轭双烯烃, 铁催化剂, 给电子体

Abstract:

The effects of different phosphorus-nitrogen compounds on the polymerization of 1,3-butadiene and isoprene catalyzed by iron(III) acetylacetonate/aluminium alkyl[Fe(acac)3/AlR3] were investigated. The results show that the use of isocyanoimino-triphenylphosphorane(IITP) as an electron donor can synthesize syndiotactic 1,2-polybutadiene(PBd) and 3,4-polyisoprene(PIp) with high activity in hexane, and the highest catalytic activity achieve 1.52×106 gPBd/molFe and 1.47×106 gPIp/molFe. The obtained polybutadiene displays a low melting point (Tm, 64.0—115 ℃), and the molar fraction of 1,2-unit can reach up to 80.2%. The molar fraction of 3,4-unit of polyisoprene is between 48.8%—52.4%, and the temperature of glass transition(Tg) is kept from -18.5 ℃ to -15.8 ℃. The unimodal distribution high-temperature gel permeation chromatography(HTGPC) curve indicates that the catalytic system has a single active center. Moreover, the quasi living polymerization characteristics of the catalytic system are verified through kinetics and seeding polymerization experiments of isoprene.

Key words: Coordination polymerization, Conjugated diene, Fe-based catalyst, Electron donor

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