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通过旋涂法在Si片上制备双酚-A聚碳酸酯(bisphenol-A polycarbonate,BAPC)薄膜,置入40℃、40kPa的丙酮蒸汽中,进行不同时间的处理.利用X射线衍射(XRD)和原子力显微镜(AFM)研究了丙酮蒸汽诱导BAPC薄膜结晶行为.XRD图谱显示,经丙酮蒸汽处理40min的BAPC薄膜样品位于27.3°处出现了明显的结晶衍射峰,衍射峰在3h之后消失并在57h后再次出现.结晶薄膜样品中的晶粒尺寸随着丙酮蒸汽处理时间的增长而增大.AFM形貌图显示开始是球晶形貌,随丙酮蒸汽处理时间的增长球晶形貌消失而纤维晶形貌出现.研究结果表明:BAPC薄膜在丙酮蒸汽诱导下,结晶速率得到显著的提高并有重结晶现象;薄膜发生重结晶时形貌也有明显的变化.
A thin film of bisphenol-A polycarbonate (BAPC) was prepared on Si wafer by spin-coating method and placed in acetone vapor at 40 ℃ and 40kPa for different time.Using X-ray diffraction (XRD) and Atomic force microscopy (AFM) investigated the crystallization behavior of acetone-induced BAPC films. XRD patterns showed that the BAPC film samples treated with acetone vapor at 37.3 ° exhibited obvious crystal diffraction peaks, disappeared after 3h and disappeared after 57h Appeared again.The crystallite size in the crystallized film samples increased with the increase of acetone vapor treatment time.AFM topography showed that the spherulite morphology was at the beginning and the spherulites disappeared with the increase of acetone vapor treatment time, The results show that the crystallization rate of BAPC film is obviously increased and recrystallized under the condition of acetone vapor and the morphology of BAPC film also has obvious change when recrystallized.