以八甲基环四硅氧烷(D4)、四甲基四氢环四硅氧烷(D4H)和六甲基二硅氧烷(MM)为原料,以强酸性离子交换树脂为催化剂,采用开环共聚法合成了一系列相对分子质量和含氢量可控、相对分子质量分布较窄的含氢聚甲基硅氧烷(PDMS-co-PHMS).研究了催化剂种类、反应温度、反应时间、催化剂用量、搅拌速度对产物相对分子质量、含氢量以及产率的影响,并通过正交试验对工艺条件进行优化,实现了一系列具有不同含氢比例的含氢聚甲基硅氧烷的可控合成;并利用红外光谱、核磁共振和凝胶渗透色谱对产物进行分析表征.结果表明,以强酸性离子交换树脂为催化剂,可控合成了相对分子质量为1.19×103～3.01×103的含氢聚甲基硅氧烷,最佳反应条件是反应温度为60℃,反应时间为12h,催化剂质量分数为1％,搅拌速度为400 r/min.
参考文献
| [1] | Lin F;Song MZ;He ZZ;Zhang TY .Synthesis and structural characterization of methacrylic acid/octadecyl acrylate-graft-poly(methylhydrosiloxane) by hydrosilylation[J].Journal of Applied Polymer Science,2008(6):3773-3780. |
| [2] | Wang WZ. .Synthesis and characterization of UV-curable polydimethylsiloxane epoxy acrylate[J].European Polymer Journal,2003(6):1117-1123. |
| [3] | Conan J. Teng;William P. Weber;Guoping Cai .Acid and base catalyzed ring-opening polymerization of 2,2,4,4,6,6-hexamethyl-8,8-diphenylcyclotetrasiloxane[J].Polymer: The International Journal for the Science and Technology of Polymers,2003(15):4149-4155. |
| [4] | Cai GP.;Weber WP. .Synthesis and chemical modification of poly(divinylsiloxane)[J].Polymer: The International Journal for the Science and Technology of Polymers,2002(6):1753-1759. |
| [5] | Hao,X.;Jeffery,J.L.;Wilkie,J.S.;Meijs,G.F.;Clayton,A.B.;Watling,J.D.;Ho,A.;Fernandez,V.;Acosta,C.;Yamamoto,H.;Aly,M.G.M.;Parel,J.-M.;Hughes,T.C. .Functionalised polysiloxanes as injectable, in situ curable accommodating intraocular lenses[J].Biomaterials,2010(32):8153-8163. |
| [6] | Mei-Hui Yang;Hsin-Tso Lin;Chih-Chun Lin .Synthesis and Characterization of Phenyl Modified PDMS/PHMS Copolymers[J].Journal of the Chinese Chemical Society,2003(1):51-57. |
| [7] | Saxena, A.;Markanday, M.;Sarkar, A.;Yadav, V.K.;Brar, A.S. .A systematic approach to decipher the microstructure of methyl hydrosiloxane copolymers and its impact on their reactivity trends[J].Macromolecules,2011(16):6480-6487. |
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