In this article

the market predominant metallocene transparent PPs (mTPPs) and Ziegler-Natta PP random copolymers (RCP) are analyzed with several analytical techniques

such as temperature rising elusion fractionation (TREF)

nuclear magnetic resonance (NMR)

gel permeation chromatography (GPC)

and differential scanning calorimetry (DSC) etc. The analytical results indicate that

from molecular to aggregation state

catalyst structure has a significant influence to the microstructures of the polymer chain; i.e. the products made from single-site metallocene catalyst have narrow molecular distribution

higher stiffness and low haze. With small amount of ethylene comonomer incorporation into the PP chain

the mTPPs exhibit excellent properties such as very narrow molecular weight distribution

high rigidity

and low haze. For different fractions of TREF

the PP microstructural regularity increases with the increasing elusion temperature. The physical properties between the PP products made from different catalysts are compared

it is clear that the TPPs made from metallocene catalyst exhibit better optical properties than the TPPs made from Z-N catalyst.