采用分步法分别制备了接枝和非接枝聚氨酯（PU）／环氧树脂（EP）互穿网络聚合物（IPNs），研究了不同配比对材料力学性能和热性能的影响。红外结果显示接枝聚氨酯／环氧树脂互穿网络聚合物分子间形成了氨基甲酸酯的接枝结构；力学性能测试结果表明，聚氨酯的引入显著地提高了材料的力学性能，当埘（PU）：m／（EP）=15：85时，接枝聚氨酯／环氧树脂互穿网络聚合物的拉伸和冲击强度达到最大值（分别为36．7MPa和22．39kJ／m^2），当m（PU）：m（EP）=10：90时，非接枝互穿网络聚合物拉伸和冲击强度达到最大值（分别为27。8MPa和19．34kJ／m^2）；TGA结果证实接枝互穿网络聚合物的热稳定性明显优于非接枝互穿网络聚合物。
Grafted and non-grafted polyurethane/epoxy resin interpenetrating polymer networks (PU/EP IPNs)were prepared by a sequential method, and effect of different PU/EP mass ratio on mechanical and thermal properties of these two types of IPNs was investigated. FT-IR analysis confirmed the formation of carbamate grafted structure within grafted PU/EP IPNs via a reaction between NCO of polyurethane and OH of epoxy resin. Results of mechanical properties test indicated that incorporation of polyurethane pre-polymer into epoxy resin could significantly improve the materials' mechanical performances, when the mass ratio of PU/EP was 15/85, grafted PU/EP IPNs' tensile and impact strengths reached their maximums, which were 36.7MPa and 22.39kJ/m^2, respectively; while PU/EP's mass ratio was 10/90, non-grafted PU/EP IPNs achieved its opti-mal tensile and impact strengths, which were 27.8MPa and 19.34kJ/m^2 , respectively. TG analysis shows thatgrafted PU/EP IPNs obviously exhibited a better thermal stability than non-grafted IPNs.
参考文献
| [1] | Sperling I.H;Mishra V .The current status of interpene- trating polymer networks[J].Polymers For Advanced Technologies,1996,7(04):197-208. |
| [2] | M. BAKAR;M. KOSTRZEWA;B. HAUSNEROVA .Preparation and Property Evaluation of Nanocomposites Based on Polyurethane-Modified Epoxy/Montmorillonite Systems[J].Advances in Polymer Technology,2010(4):237-248. |
| [3] | Kostrzewa, M.;Hausnerova, B.;Bakar, M.;Siwek, E. .Effects of various polyurethanes on the mechanical and structural properties of an epoxy resin[J].Journal of Applied Polymer Science,2011(5):2925-2932. |
| [4] | Hsieh K H;Han J L .Graft interpenetrating polymer networks of polyurethane and epoxy.I.mechanical be havior[J].Journal of Polymer Science Part B:Polymer Physics,1990,28(05):623-630. |
| [5] | Hsieh K H;Han J L .Graft interpenetrating polymer networks of polyurethane and epoxy.Ⅱ.toughening meehanism[J].Journal of Polymer Science Part B:Pol ymer Physics,1990,28(06):783-794. |
| [6] | Kostrzewa, M.;Hausnerova, B.;Bakar, M.;Dalka, M. .Property evaluation and structure analysis of polyurethane/epoxy graft interpenetrating polymer networks[J].Journal of Applied Polymer Science,2011(3):1722-1730. |
| [7] | Swann M H;Esposito G G .Detection of urea,mela mine,isocyanate,and urethan resins-rapid group test for nitrogen,silicon,phosphorus,and titanium in coatingmaterials[J].Analytmal Chemistry,1951,30(01):107-109. |
| [8] | Xiangrong Xi;Zhenming Ye;Chaosheng Yu .Preparation and Characterization of Electroconductive Adhesives of NanoG/Polyurethane-Epoxy IPNs[J].The Journal of Adhesion,2010(7/9):793-806. |
| [9] | 聚氨酯/环氧树脂接枝互穿网络聚合物制备和材料拉伸性能[J].上海大学学报(自然科学版),1998(06):675. |
| [10] | Mahesh K P O;Alagar M;Ananda Kumar S .Thermal and morphological behavior of bismaleimide modified polyurethane-epoxy IPN matrices[J].Polymers for Ad ranted Technologies,2003,14(02):137-146. |
| [11] | 白战争,赵秀丽,罗雪方,罗世凯.聚氨酯增韧环氧灌封材料的制备与表征[J].化工进展,2009(06):1010-1013,1018. |
| [12] | 李芝华,卢健体,丑纪能,郑子樵,邓飞跃.高性能TDE-85/E-51环氧树脂的聚氨酯增韧改性[J].中南大学学报(自然科学版),2008(06):1239-1243. |
| [13] | 胡巧玲,方征平.PU/EP互穿网络聚合物的协同效应[J].浙江大学学报(理学版),2001(02):179-184. |
| [14] | Song Jiangxuan;Wu Gang;Shi Jianjun et al.Proper- ties and morphology of interpenetrating polymer net- works based on poiy(urethane imide)and epoxy resin[J].Macromolecular Research,2010,18(10):944-950. |
| [15] | Raymond MP.;Bui VT. .Epoxy/castor oil graft interpenetrating polymer networks[J].Journal of Applied Polymer Science,1998(9):1649-1659. |
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