摘要
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m(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/m2),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/m2);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.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2012年第20期2777-2781,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51174085)
科技部资助项目(C9C26214301994)
湖南省水利厅科技计划资助项目([2010]124-02)
长沙市科技局资助项目(K1005176-11)
关键词
互穿网络
环氧树脂
聚氨酯
接枝反应
interpenetrating polymer networks
epoxy resin
polyurethane
grafting reaction
