PET和PBT在淬火或退火时可分别生成正常球晶或变态球晶,本文用小角激光散射法考察了变态球晶的形成条件和光散射图形,用有效偶极矩模型,结合傅里叶变换原理,分析了变态球晶光散射图形的成因,指明了变态球晶中分子链的排列方式.

PET and PBT can grow into usual or unusual spherulites respectively when they are annealed or quenched. In this paper, the conditions of formation of unusual spherulites and their scattering patterns are investigated by smallangle laser scattering. By means of the model of effective dipole moment and Fourier transform principle, the formation causes of the scattering patterns are analysed and the internal structure of the unusual spherulites is illustrated.