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In this study, a series of bi-axially oriented films based on homo polypropylene (PP) and hydrocarbon resin (HCR) modified PP were prepared to investigate their mechanical properties, optical properties, permeability to gases and water vapors and shrinkage ratio. Hydrogenated dicyclopentadiene (DCPD) resin and hydrogenated C9 resin were used as HCR in this study. Bi-axially oriented polypropylene (BOPP) films made with PP/HCR blends showed better mechanical properties (higher Young’s modulus), better optical properties (lower haze), lower permeability to gases and water vapors and increased shrinkage ratio than BOPP films made with homo-PP. Hydrogenated DCPD resin and hydrogenated C9 resin showed similar contribution to the improvement in mechanical properties and optical properties of BOPP films, but there are a differences in permeability to gases and water vapors and shrinkage ratio.

A Study on the Filmic Properties of Polypropylenen by Modification of Hydrogenated Hydrocarbon Resin