论文部分内容阅读
利用联萘基团的结构刚性和轴向不对称性,通过氢转移加成聚合制备了具有光学活性的旋光聚氨酯脲(RPUU)和消旋聚氨酯脲(PUU)。采用傅里叶红外光谱、紫外-可见光谱、X射线衍射、热重等表征手段对R-PUU和PUU进行了表征,并测定了材料的介电常数(ε)。结果表明:R-PUU的ε值为1.7356,PUU的ε值为0.7136,R-PUU更规整的聚合物结构可能有利于提高材料的介电常数。
With the structural rigidity and axial asymmetry of binaphthyl groups, optically active optically active polyurethane (RPUU) and racemic polyurethane urea (PUU) were prepared by hydrogen transfer addition polymerization. The properties of R-PUU and PUU were characterized by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, X-ray diffraction and thermogravimetry. The dielectric constant (ε) of the material was measured. The results show that the ε value of R-PUU is 1.7356, and the ε value of PUU is 0.7136. The more regular polymer structure of R-PUU may be helpful to improve the dielectric constant of the material.