将聚磷酸铵(APP)热活化后与三聚氰胺(MEL)进行反应得到接枝MEL的APP(MAPP),进一步用甲醛交联制得密胺-甲醛树脂包覆改性的APP(MFAPP).扫描电镜、红外光谱及热重分析结果表明,改性后APP的表面被成功地包覆上了密胺-甲醛树脂,改性APP的起始分解温度从190℃升高到了245℃;研究MEL用量对MFAPP水溶性以及阻燃性能的影响表明,改性后APP的水溶性大幅下降,阻燃性能得到提高.当MEL的质量为APP的8％时,MFAPP的溶解度达到最低,此时70PP/30MFAPP的极限氧指数(LOI)为28％,70PP/20MFAPP/10PER的LOI值达到了35.0％;进一步研究改性对APP与聚丙烯(PP)相容性的影响,结果表明,PP/MFAPP拉伸性能优于PP/APP.
参考文献
| [1] | Enescu, D.;Frache, A.;Lavaselli, M.;Monticelli, O.;Marino, F. .Novel phosphorous-nitrogen intumescent flame retardant system. Its effects on flame retardancy and thermal properties of polypropylene[J].Polymer Degradation and Stability,2013(1):297-305. |
| [2] | H. Demir;D. Balkoese;S. Uelkue .Influence of surface modification of fillers and polymer on flammability and tensile behaviour of polypropylene-composites[J].Polymer Degradation and Stability,2006(5):1079-1085. |
| [3] | Lin, H.;Yan, H.;Liu, B.;Wei, L.;Xu, B. .The influence of KH-550 on properties of ammonium polyphosphate and polypropylene flame retardant composites[J].Polymer Degradation and Stability,2011(7):1382-1388. |
| [4] | Lin Liu;Yanan Zhang;Lin Li;Zhengzhou Wang .Microencapsulated ammonium polyphosphate with epoxy resin shell: preparation, characterization, and application in EP system[J].Polymers for advanced technologies,2011(12):2403-2408. |
| [5] | Yingjun Zhang;Yanbing Lu;Fei Guo;Chang Peng;Mingming Li;Weijian Xu .Preparation of microencapsulated ammonium polyphosphate with montmorillonite-melamine formaldehyde resin and its flame retardancy in EVM[J].Polymers for advanced technologies,2012(2):166-170. |
| [6] | Kun Wu;Zhengzhou Wang;Haojun Liang .Microencapsulation of Ammonium Polyphosphate: Preparation, Characterization, and Its Flame Retardance in Polypropylene[J].Polymer Composites,2008(8):854-860. |
| [7] | Chiu SH.;Wang WK. .Dynamic flame retardancy of polypropylene filled with ammonium polyphosphate, pentaerythritol and melamine additives[J].Polymer: The International Journal for the Science and Technology of Polymers,1998(10):1951-1955. |
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