论文部分内容阅读
以聚甲醛(POM)为研究对象,采用加入0.1-0.3 T的直流磁场,在聚合物熔融重结晶过程中实现对其结晶形态的改变。应用金相显微镜、差示扫描量热法(DSC)、X-射线衍射法(XRD)和红外光谱法(FT-IR)对磁场改性前后的聚甲醛样品的结构和性质进行表征。实验表明:聚甲醛(POM)在直流磁场作用下,分子链受到磁场的作用而增加了C-O-C的弯曲振动,片晶间距及片晶厚度增大,结晶度和熔点升高。
Taking polyoxymethylene (POM) as the research object, the DC magnetic field of 0.1-0.3 T was added to change the crystalline morphology during melt recrystallization. The structure and properties of polyoxymethylene samples before and after magnetic field modification were characterized by optical microscopy, differential scanning calorimetry (DSC), X-ray diffraction (XRD) and infrared spectroscopy (FT-IR). Experiments show that polyoxymethylene (POM) under the action of direct current magnetic field, the molecular chain by the magnetic field increases the bending vibration of C-O-C, sheet spacing and lamellar thickness increases, the crystallinity and melting point increased.