CAJ | 학술논문

采用同步互穿聚合物网络技术制备了聚氨酯改性TDE-85／MeTHPA环氧树脂体系，比较了环氧树脂TDE-85／MeTHPA固化体系改性前后力学性能和热稳定性的差异。研究结果表明，加入适量的由不同分子量聚醚二元醇合成的聚氨酯预聚体，对TDE-85／MeTHPA固化体系的力学性能、热稳定性均有所增加；当聚醚二元醇分子量为1000，且合成的聚氨酯预聚体加入量为15％时，同未改性的固化体系相比，该改性体系的拉伸强度和冲击强度分别上升48．0％和115％，分别达到69．39MPa和23．56kJ／m^2，同时，该改性材料的热稳定性也有较明显的提高，其失重1％的温度T1%为300℃，比未改性的固化体系失重1％的温度高了30℃。
채용동보호천취합물망락기술제비료취안지개성TDE-85／MeTHPA배양수지체계，비교료배양수지TDE-85／MeTHPA고화체계개성전후역학성능화열은정성적차이。연구결과표명，가입괄량적유불동분자량취미이원순합성적취안지예취체，대TDE-85／MeTHPA고화체계적역학성능、열은정성균유소증가；당취미이원순분자량위1000，차합성적취안지예취체가입량위15％시，동미개성적고화체계상비，해개성체계적랍신강도화충격강도분별상승48．0％화115％，분별체도69．39MPa화23．56kJ／m^2，동시，해개성재료적열은정성야유교명현적제고，기실중1％적온도T1%위300℃，비미개성적고화체계실중1％적온도고료30℃。
TDE -85/MeTHPA epoxy resin was modified by polyurethane with the structure of interpenetrating poly- mers network （IPN）. The differences of modified system mechanical and thermal stability were discussed. The result indi- cated that the property percentage of polyurethane prepolymer（PUP） in TDE - 85/MeTHPA epoxy resin can improve me- chanical properties and thermal stability of the modified system, no matter how much the molecular weight of polypropyl- ene glycol（PPG） was. When the PPG molecular weight was 1000, and PUP was 15% , and the modified system mechani- cal property was very good. Its tensile strength was 69.39 MPa with increasing 48.0% , and its impact strength was 23.56 kJ/m2 with increasing 115%. At the seem time, thermal stability of the modified system was also good, and the tempera- ture of loss weight 1% was 300℃. Compared with the unmodified system, the temperature of loss weight 1% increased 30℃.