累托石粘土/热塑性聚氨酯弹性体纳米复合材料的研究

采用十二烷基季铵盐合成了一种有机累托石 (ORECA) ,并分别采用不同填充量 2 ,5 ,8份的累托石(REC)及ORECA 与热塑性聚氨酯弹性体 (TPUR)通过熔融共混制备出了粘土 /热塑性聚氨酯弹性体纳米复合材料 ;以红外光谱 (FTIR)、广角X 射线衍射分析 (XRD)、扫描电镜 (SEM)及Molau实验方法研究了REC及ORECA 在TPUR中的分散性 ,研究了复合材料的力学性能 .结果表明 ,ORECA 在质量分数小于 5份时可以和聚氨酯弹性体达到纳米复合 ,复合材料的拉伸强度提高 4 2 % ;撕裂强度在所加份数范围内呈现递增趋势 ,8份时撕裂强度提高 4 9% .

STUDY ON NANOCOMPOSITES OF THERMOPLASTIC POLYURETHANE WITH RECTORITE CLAY

Composites of thermotropic polyurethane(TPUR) with rectorite and organic rectorite clays of different composition were prepared by melt processing.The organic rectorite(OREC A) was obtained in an ion-exchange reaction of rectorite with quaternary ammonium salt.The composites were characterized by using FTIR,WAXD,SEM and mechanical measurements.It was found that the door spacing of OREC A crystals increased and even disappeared,when they were mixed with TPUR.These results implied the intercalation phenomenon and the nanoscale disperison of OREC A in the composites.The tensile strength of TPUR composites with 2 parts of OREC A was about 42% higher than that of the pure TPUR.With increasing the OPEC A content the few strength of the composites increased noticeably.An increase 92 8?kN/m to 138 8?kN/m was observed when 8 parts of OREC A was added in the composites.