EFFECT OF CLAY MODIFICATION PARAMETERS ON INSITU POLYMERIZATION OF ETHYLENE/CLAY BY CP2ZRCL2 CATALYST

The present work explores the effect of new clay modification on in-situ polymerization of ethylene/clay with the aim of higher produced polymer. Accordingly, nanoclays were modified by ammonia gas,methylaluminoxane (MAO) and dodecylamine (DDA). The investigation of various combinations of thesematerials, indicates that the modification of clay platelets with ammonia has a great effect on increasing of produced polyethylene. Additionally, the modification of clay with MAO together with ammonia enhances the content of produced polymer, too. Moreover, the treatment of clay with DDA and ammonia gas increases the extent of produced polyethylene compared to unmodified clay. The comparison of different systems results in following order according to lowering produced polymer: MAO/Ammonia > DDA/Ammonia > Ammonia> Unmodifiedclay.TEM micrograph revealed that the exfoliated structure is formed in nanocomposite modified by MAO/Ammonia. From FTIR analysis it can be said that water molecules of clays are reduced by Ammonia modification

Keywords:

MAO , Ammonia , Polyethylene , Clay , Polymerization