[1]宋雨骏,赵忠夫,李博涵,等.星形多臂丁苯共聚物的分子结构设计与合成[J].合成橡胶工业,2024,5:367-372.
SONG Yu-jun,ZHAO Zhong-fu,LI Bo-han,et al.Molecular structure design and synthesis of star-shaped multi-arm styrene-butadiene copolymer[J].China synthetic rubber industy,2024,5:367-372.
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《合成橡胶工业》[ISSN:1000-1255/CN:62-1036/TQ]
- 期数:
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2024年5期
- 页码:
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367-372
- 栏目:
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- 出版日期:
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2024-09-15
文章信息/Info
- Title:
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Molecular structure design and synthesis of star-shaped multi-arm styrene-butadiene copolymer
- 文章编号:
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1000-1255(2024)05-0367-06
- 作者:
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宋雨骏; 赵忠夫; 李博涵; 李 倩; 李龙昊; 张春庆?鄢
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(大连理工大学 化工学院,辽宁 大连 116084)
- Author(s):
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SONG Yu-jun; ZHAO Zhong-fu; LI Bo-han; LI Qian; LI Long-hao; ZHANG Chun-qing
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(School of Chemical Engineering, Dalian University of Technology, Dalian 116084, China)
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- 关键词:
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丁苯共聚物; 星形支化; 活性负离子聚合; 六氯乙硅烷; 偶联反应; 分子量及其分布
- Keywords:
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styrene-butadiene copolymer; star-shaped branch; living anionic polymerization; hexa-chlorodisilane; coupling reaction; molecular weight and its distribution
- 分类号:
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TQ 333.1
- DOI:
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DOI:10.19908/j.cnki.ISSN1000-1255.2024.05.0367
- 文献标识码:
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A
- 摘要:
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以正丁基锂为引发剂、苯乙烯与丁二烯为单体、双四氢糠丙烷为极性结构调节剂、六氯乙硅烷为偶联剂,采用活性负离子聚合技术设计并合成了一系列具有星形结构的多臂丁苯共聚物(S-g-SSB-6)。使用凝胶渗透色谱分析了S-g-SSB-6的分子量及其分布、偶联臂数和偶联效率,使用旋转流变仪测试了S-g-SSB-6、以SiCl4为偶联剂的星形多臂丁苯共聚物及线型结构丁苯共聚物(L-SSB)的流变性能,并考察了支链长度和支链柔顺性对S-g-SSB-6流变性能的影响。结果表明,S-g-SSB-6的偶联臂数达到4.1、偶联效率均大于80%;相同重均分子量下S-g-SSB-6的熔体黏度较L-SSB更低、流体流动性更好;当支化度相同时,S-g-SSB-6的熔体黏度随着单臂分子量和分子链刚性的增加而增大。
- Abstract:
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A series of star-shaped multi-arm styrene-butadiene copolymers (S-g-SSB-6) were synthesized by living anionic polymerization, with n-butyllithium as initiator, styrene and butadiene as monomers, 2,2-di(tetra-hydrofuran-2-yl) propane as polar structure regulator and hexachlorodisilane as coupling agent. The molecular weight and its distribution, coupling arm number and coupling efficiency of S-g-SSB-6 were characterized by gel permeation chromatogram. The rheological properties of S-g-SSB-6, star-shaped multi-arm styrene-butadiene copolymer with SiCl4 as coupling agent, and linear styrene-butadiene copolymer (L-SSB) were characterized by rotational rheometer, and the effects of branched chain length and branched chain flexibility on the rheological properties of S-g-SSB-6 were also investigated. The results showed that the coupling arm numbers of S-g-SSB-6 reached 4.1, and the coupling efficiency was greater than 80%. S-g-SSB had lower melt viscosity and better fluid flow than those of L-SSB under the same weight-average molecular weight. When the branching degree was the same, the melt viscosity of S-g-SSB-6 increased with the increase of single arm molecular weight and molecular chain rigidity.
参考文献/References
[1] Shanbhag S. Probing nonmonotonic variation of terminal rela-xation in star-linear blends with a fast slip link model[J]. Journal of Rheology, 2021, 65(5): 943-957.[2] Okaya Y, Jochi Y, Seki T, et al. Precise synthesis of a homogeneous thermoresponsive polymer network composed of four-branched star polymers with a narrow molecular weight distribution[J]. Macromolecular, 2020, 53(1): 374-386.[3] 慕春雨. 端基改性杂臂星形溶聚丁苯橡胶的合成研究[D]. 北京: 北京化工大学, 2012.[4] 佟园园. 星形溶聚丁苯橡胶的端基改性研究[D]. 北京: 北京化工大学, 2010.[5] 孙良. 官能化多锂引发剂的制备及其在三大单体聚合中的应用[D]. 大连: 大连理工大学, 2005.[6] Masaaki, Miyamoto, Mitsuo, et al. Synthesis of monodisperse living poly(vinyl ethers) and block copolymers by the hydrogen iodide/iodine initiating system[J]. Macromolecules, 1984, 17(11): 2228-2230.[7] 罗毅. 偶联法合成星型SIS工艺[J]. 湖南理工学院学报(自然科学版), 2016, 29(3): 52-55.[8] 路蓬. 几种偶联法改性丁苯橡胶的研究[D]. 北京: 北京化工大学, 2011.[9] Zhou Jiahui, Li Hanmo, Lu Xun. Damping elastomer with broad temperature range based on irregular networks containing hyperbranched polyester and dangling chains[J]. Polymers for Advanced Technologies, 2018, 29(8): 2308-2316.[10] 邱思宇, 滕林, 杨晓雪, 等. 活性负离子丁苯共聚的偶联反应[J]. 合成橡胶工业, 2017, 40(1): 7-11.[11] 于志娟, 武敬翔, 蒋景阳, 等. 2,2-二(5-甲基-2-四氢呋喃基)丙烷在丁二烯-苯乙烯阴离子聚合中的结构调节能力[J]. 精细化工, 2023, 40(5): 1022-1028.
备注/Memo
- 备注/Memo:
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国家自然科学基金资助项目(51673034)。
更新日期/Last Update:
1900-01-01