采用过氧化氢/L-抗坏血酸(H2O2/L-AA)氧化还原引发剂引发丙烯腈(AN)的细乳液聚合；探讨了乳化剂、单体和引发剂浓度以及聚合温度对聚丙烯腈(PAN)乳胶粒子的粒径、形态的影响,通过扫描电镜(SEM)和X射线衍射(XRD)分析了球形PAN乳胶粒子的形成机理.在AN质量分数为10％,助稳定剂十六烷(HD)为基于AN质量的4％,乳化剂十二烷基硫酸钠(SLS)和引发剂浓度分别为基于水相的8mmol/L和1.6 mmol/L时,制备出了粒径为67.54 nm的规则球形PAN乳胶粒子,并发现聚合温度是控制PAN乳胶粒子形态的关键因素.通过与热引发剂体系过硫酸钾(KPS)和偶氮二异丁腈(AIBN)分析比较,进一步表明低温聚合能降低PAN乳胶粒子表面结晶,是PAN乳胶粒子呈现出规则球形的原因.
参考文献
| [1] | Jeon, H.J.;You, Y.;Yoon, M.J.;Youk, J.H. .Preparation of polyacrylonitrile nanoparticles via dispersion polymerization of acrylonitrile using a poly(N-vinyl pyrrolidone)-cobalt complex in an aqueous system[J].Polymer: The International Journal for the Science and Technology of Polymers,2011(18):3905-3911. |
| [2] | Masayoshi Okubo;Syuji Fujii;Hiroshi Maenaka;Hideto Minami .Production of polyacrylonitrile particles by precipitation polymerization in supercritical carbon dioxide[J].Colloid and polymer science,2003(10):964-972. |
| [3] | Zi Wang;Ya Jun Yang;Qingzhi Dong .Polymerization of acrylonitrile in supercritical carbon dioxide[J].Polymer: The International Journal for the Science and Technology of Polymers,2006(22):7670-7679. |
| [4] | Dong Woo Cho;Kyoung Shil Oh;Won Bae .Synthesis of monodispersed poly(acrylonitrile) microspheres by dispersion polymerization in compressed liquid dimethyl ether[J].Colloid and polymer science,2009(2):179-188. |
| [5] | Sanghvi PG.;Gopalkrishnan KS.;Devi S.;Patel AC. .Reactivity ratios and sequence distribution of styrene-acrylonitrile copolymers synthesized in microemulsion medium[J].European Polymer Journal,2000(10):2275-2283. |
| [6] | Boguslavsky L;Baruch S;Margel S .Synthesis and characterization of poly acrylonitrile nanoparticles by ispersion/emulsion polymerization process[J].Journal of Colloid and Interface Science,2005(1):71-85. |
| [7] | 余樟清,李洁爱,倪沛红,朱秀林.细乳液聚合研究进展[J].高分子材料科学与工程,2002(05):36-40. |
| [8] | J. Prasad Rao;Kurt E.Geckeler .Polymer nanoparticles: Preparation techniques and size-control parameters[J].Progress in Polymer Science,2011(7):887-913. |
| [9] | Landfester K.;Antonietti M. .The polymerization of acrylonitrile in miniemulsions: "Crumpled latex particles" or polymer nanocrystals[J].Macromolecular rapid communications: Publishing the newsletters of the European Polymer Federation,2000(12):820-824. |
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