红外显微化学图像技术在空心微球制备中的应用

在考察聚苯乙烯(PS)与聚乙烯基苄氯(PVBCl)相容性及干涉效应对测量结果影响的基础上,使用红外显微化学图像技术研究表征了PS与PVBCl混合物薄膜和微球的相分离情况,对比分析了不同处理条件下制备的微球半球壳中两种聚合物的相分离红外显微化学图像。研究结果表明建立的研究方法可以用来定性或半定量的分析球壳内PS和PVBCl两聚合物的分相情况,在测试中样品的干涉效应会对测量造成较大的不确定度,在不同温度下获得的聚合物微球样品中,40℃条件下两聚合物的分相情况更为理想。该研究为探索非均相双半球型聚合物微球制备条件以及红外显微化学图像法表征聚合物相分离提供了一种直观可行的表征方法,但受空间分辨率的影响,该方法不适合于6.25μm×6.25μm以下尺寸样品的分析。

Application of infrared microscopic chemical image technology to preparation of hollow microspheres

Via measuring results of phase compatibility and interference effects between polystyrene (PS) and polyvinyl benzyl chloride (PVBCl), the influence on the phase separation status of the two substances in the cured film and shell from solution mixed with PS and PVBCl was studied using the infrared microscopic chemical image, and the phase separation of the two polymers of the microspheres obtained under different processing conditions was studied by the infrared microscopic chemical image. The results indicated that the established method can be used to analyze the phase separation of PS and PVBCl in the shell of microspheres by qualitative or semi-quantitative, and the large testing uncertainty caused by the interference effects in polymer microspheres, can be optimized at 40 ℃ because of the better phase separation of these two polymer substances. This study provides a method to investigate the conditions of preparation of heterogeneous dual hemispherical polymer, and to characterize the phase separation of polymer by infrared microscopic chemical image. However, this method affected by the spatial resolution is not suitable for the sample with size less than 6.25 m6.25 m.