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对用红外偏振光谱测定聚丙烯薄膜的取向(单轴拉伸)进行了初步的探讨和研究,并和双折射法及X-射线衍射的结果进行了比较,三者的趋势是一致的,是线性相关的。聚丙烯的1256cm~(-1)、973cm~(-1)谱带是结晶和非结晶的混合谱带,在不同的偏振红外光下反映了聚丙烯薄膜分子链总的取向状况,所得的结果和双折射法获得的结果线性相关。聚丙烯的997cm~(-1)、840cm~(-1)谱带是结晶谱带,在不同的偏振红外光下反映了聚丙烯薄膜晶区分子链的取向状况,其结果和x-射线衍射所得到的结果线性相关。实验结果说明,用偏振红外光,根据聚丙烯薄膜结晶谱带或混合谱带的变化情况,可以了解聚丙烯薄膜晶区或整个分子链的取向情况。
The orientations (uniaxial stretching) of polypropylene film were investigated by infrared polarization spectroscopy. The results of the comparison with the results of birefringence and X-ray diffraction show that the three trends are the same Linearly related. The bands of 1256cm -1 and 973cm -1 of polypropylene are crystalline and non-crystalline mixed bands, which reflect the total orientation of the molecular chains of polypropylene film under different polarized infrared light. The obtained results And birefringence obtained by the results of a linear correlation. The 997cm ~ (-1) and 840cm ~ (-1) bands of PP are crystalline bands, which reflect the orientation of molecular chains in the crystalline region of PP film under different polarized infrared light. The results show that XRD, The results obtained are linearly related. Experimental results show that using polarized infrared light, according to polypropylene film crystallization band or mixed band changes, you can understand the polypropylene film crystal region or the entire molecular chain orientation.