CAJ | 학술논문

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。
채용분보법분별제비료접지화비접지취안지（PU）／배양수지（EP）호천망락취합물（IPNs），연구료불동배비대재료역학성능화열성능적영향。홍외결과현시접지취안지／배양수지호천망락취합물분자간형성료안기갑산지적접지결구；역학성능측시결과표명，취안지적인입현저지제고료재료적역학성능，당시（PU）：m／（EP）=15：85시，접지취안지／배양수지호천망락취합물적랍신화충격강도체도최대치（분별위36．7MPa화22．39kJ／m^2），당m（PU）：m（EP）=10：90시，비접지호천망락취합물랍신화충격강도체도최대치（분별위27。8MPa화19．34kJ／m^2）；TGA결과증실접지호천망락취합물적열은정성명현우우비접지호천망락취합물。
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.