中文摘要：

在298K，采用液相丙酮或26．5kPa蒸气压的气相丙酮，对双酚A聚碳酸酯（BAPC）的液相或气相诱导结晶行为进行研究．实验结果表明，在诱导结晶的起始阶段，非晶态BAPC结晶能力得到极大的提高．气相诱导BAPC结晶的结晶速度和结晶度均低于液相诱导结晶的结果．广角X射线衍射（WAXD）测试结果表明，与BAPC热结晶样品相比，丙酮液相或气相诱导BAPC结晶生成的晶体具有完善度低、晶粒尺寸小、熔点低，而结晶度高的结构特点．采用扫描电子显微镜（SEM）分别对液相或气相丙酮诱导BAPC结晶样品表面形态进行了观察，研究了不同诱导机制下BAPC的结晶生成球晶的形态与机制．

英文摘要：

Acetone liquid-induced and vapor-induced （26.5 kPa） crystallization behavior of bisphenol-A polycarbonate （BAPC） at 298 K was studied and compared. The results showed that in the initial stage of the induced crystallization, the ability of the amorphous BAPC to crystallize had been greatly enhanced with a rapid increase of crystallinity. Compared with liquid-induced crystallization, the crystallization rate and crystallinity of vapor induced crystallization were much lower. Wide-angle X-ray diffraction spectra displayed that liquid induced or vapor induced crystallization of BAPC samples enjoyed such characters as smaller and less perfect crystal grains and a higher crystallinity in comparison with a melting crystallization process. The morphology of BAPC samples after liquid induced or vapor induced crystallization was examined by means of a scanning electron microscope and the different spherulite morphologies as well as formarion of spherulites of crystallized samples prepared by the two inducing methods were studied.