In this study,three kinds of imidazole ionic liquids,1-methyl-3-butylimidazole hexafluorophosphate ([bmim]PF6),1-methyl-3-hexylimidazole hexafluorophosphate ([hmim]PF6) and 1-methyl-3-octylimidazole hexafluorophosphate ([omim]PF6),were synthesized by microwave heating method.The cationic polymerization of isobutyl vinyl ether (IBVE) was initiated in ionic liquids using an AgClO4/BnBr initiating system at 0℃,and the effects of different types of ionic liquids and silver salts on the polymerization reaction were investigated.According to the experimental results,the microwave method shortened the synthesis time of ionic liquids,and the yield reached 83.48% after heating for 1 minute.The polymerization reaction using ionic liquids as solvents was milder than using traditional organic solvents.The average molecular weight and yield of polymerization products in ionic liquid reached 3.4×104 and 92.13%,respectively.In addition,the ionic liquid recovery experiment showed that the ionic liquid could be recycled and had little impact on the yield.
[1] 李雪辉,赵东滨,费兆福,等.离子液体的功能化及其应用[J].中国科学,2006,36(3):181-196.
[2] 李汝雄,王建基.绿色溶剂—离子液体的制备与应用[J].化工进展,2002,21(1):43-47.
[3] Wilkes J S,Zaworotko M J.Air and water stable 1-ethyl-3-methylimidazolium based ionic liquids[J].Journal of the Chemical Society,1992,23(43):965-967.
[4] Clark J h.Challenges and opportunities[J].Green Chemistry,1999,1(1):1-8.
[5] 王丽华.绿色溶剂-离子液体的合成[J].广东化工,2012,39(3):76.
[6] Chowdhury S,Mohan R S,Scott J L.Reactivity of ionic liquids[J].Tetrahedron,2007,63(11):2363-2389.
[7] 王昱超.高分子材料的研究现状及发展前景[J].科学家,2016,4(14):8-9.
[8] 汪伟志,佘万能,沈革新,等.乙烯基醚类化合物的制备[J].化学与生物工程,2000,17(3):29-31.
[9] 桑伟.异丁基乙烯基醚化合物的合成与研究[D].杭州:浙江大学,2006.
[10] 张妍婧,任家渊,杨熙鹏,等.高氯酸银催化4-甲氧基苯乙烯阳离子聚合反应[J].塑料工业,2020,48(2):54-57.
[11] Han L,Wu Y B,Dan Y,et al.Characteristics and mechanism of styrene cationic polymerization in 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid[J].Royal Society of Chemistry Advances,2016,107(6):1-24.
[12] Zhang X Q,Guo W L,Wang Y B,et al.Synthesis of random copolymer of isobutylene with p-methylstyrene by cationic polymerization in ionic liquids[J].E-Polymers,2018,18(5):423-431.
[13] Ranganathan V,Macfarlane D R.Novel acid initiators for the rapid cationic polymerization of styrene in room temperature ionic liquids[J].Science China-Chemistry,2012,55(8):1671-1676.
[14] Wu Y B,Han L,Zhang X Q,et al.Cationic polymerization of isobutyl vinyl ether in an imidazole-based ionic liquid:characteristics and mechanism[J].Polymer Chemistry,2015,6(13):2560-2568.
[15] 王振中,朱光明,陈北强.室温离子液体[bmim]PF6的合成[J].化学工程师,2007,21(6):14-16.
[16] 武冠英.阳离子聚合的进展[J].高分子通报,1999,15(3):88-93.
[17] 高玉娟,伍一波,郭文莉,等.异丁基乙烯基醚在咪唑类离子液体中阳离子聚合的研究[J].化工新型材料,2015,43(9):101-103.
[18] 张德超,张丽鹏,于先进,等.1-丁基-3-甲基咪唑六氟磷酸盐离子液体合成与表征[J].化工时刊,2012,26(2):5-8.
基金资助
四川农业大学科研兴趣培养计划(2022305)
PDF
