三聚氰胺甲醛/聚乙烯醇复合材料的制备及性能研究

Preparation and properties of melamine formaldehyde/polyvinyl alcohol composite material

用聚乙烯醇(PVA)对三聚氰胺甲醛树脂(MF)进行改性制备MF/PVA复合材料,考察了PVA的添加量对MF/PVA性能的影响。用傅里叶红外光谱仪(FT-IR)、万能力学试验机、X-射线衍射仪(XRD)、差示扫描量热仪(DSC)、扫描电子显微镜(SEM)等对复合材料的结构与性能进行表征。研究结果表明:PVA的加入能提高MF的结晶性,使复合材料的拉伸强度和断裂伸长率均呈现先增加后降低趋势;当m(MF)∶m(PVA)=1∶1时,两者均达最大;此时复合材料的相容性较好,表面均匀、光滑,结构紧密,但所制得的MF/PVA复合材料热稳定性有所降低。

Melamine formaldehyde resin(MF)was modified with polyvinyl alcohol(PVA)to prepare MF/PVA composite material,and the effect of PVA content on the properties of MF/PVA was investigated.The structure and properties of composite material were characterized by infrared spectroscopy(FT-IR),universal mechanical testing machine,X-ray diffractometer(XRD),differential scanning calorimeter(DSC),and scanning electron microscope(SEM).The research results showed that the addition of PVA could improve the crystallinity of MF,so that the tensile strength and elongation at break of composite material increased first and then decreased.Both of them reached the maximum when m(MF)∶m(PVA)=1∶1.At this time,the compatibility of composite material was good,the surface was uniform and smooth,and the structure was compact,but the thermal stability of the prepared MF/PVA composite material decreased to certain extents.