The effect of nucleation temperature and phenyl d-spacing of polystyrenic nanoparticles on relative percentage of beta polymorphism in polypropylene

The effect of mono size linear polystyrene (PS), linear and cross linked styrene acrylonitrile (SAN, XSAN) copolymer with 25 wt% of acrylonitrile particles and average molecular weight of 500 kg/mole on relative percentage of beta polymorphism of polypropylene was investigated utilizing polarized optical microscope (POM), X-ray diffraction (XRD) and differential scanning calorimetery (DSC). The relative percentage of β polymorphism in PP containing SAN, PS and XSAN after annealing at 115 C for 10 minutes was 34, 14 and 6%, respectively. The difference in β nucleation efficiency of these particles was attributed to the average phenyl d-spacing of styrene monomers in the backbone of PS, SAN and XSAN nano particles

کلیدواژه ها:

Polypropylene ، Beta nucleating agent ، Polymeric nano additive ، Crystal nano structure