不同增容剂对玻璃纤维增强聚甲醛复合材料性能的影响研究

采用硅烷偶联剂γ?氨丙基三乙氧基硅烷(KH550)、γ?(2,3?环氧丙氧)丙基三甲氧基硅烷(KH560)和高分子増容剂M分别对玻璃纤维增强聚甲醛复合材料(POM/GF)进行增容改性,并通过力学性能测试、扫描电子显微镜、旋转流变仪以及差示扫描量热仪探究增容剂类型及其含量对POM/GF复合材料的力学性能、界面形貌、流变行...

Effect of compatibilizers on properties of glass-fiber-reinforced polyoxymethylene composites

Silane coupling agent （KH550 and KH560） and polymer interfacial compatibilizer M were used to modify the glass fiber reinforced polyformaldehyde composites （POM/GF）， and the mechanical properties of the resultant compo?sites were investigated using an electronic universal testing machine and a pendulum impact testing machine. Scanning electron microscopy， rotating rheometer and differential scanning calorimetry were conducted to investigate the effects of the type and content of compatilizer on the profile， rheological behavior， crystallization properties， and dynamic thermomechanical properties of the composites. The results indicated that the polymer compatilizer M had a better compatilizing effect on the POM/GF composites than the small molecules KH550 and KH560. The tensile strength， bending strength and notched impact strength of the POM/GF composites containing 0.5 wt % M reached 120.9 MPa， 170.5 MPa and 8.58 kJ/m²， respectively， which were increased by 14.2 %， 19.1 % and 32.3 %， respectively， compared to the composite without M. In addition， the incorporation of M increased the crystallization temperature of the composites， reduced their crystallinity， and promoted their crystallization process.