An electrostatic reduced gravity device was developed and used specially for the study of the melt crystallization of polypropylene. The crystal structure of melt crystallized polypropylene prepared under the reduced gravity environment was investigated by using X ray diffraction. The experiment results show that the crystal structure of the polypropylene is strongly dependent on the gravity applied to the sample during solidification. It is found that the crystallographic parameters a and b increase markedly with reduced gravity ratio, while the value of c increases mildly.
展开▼
