Authors affiliation1Indian Oil Corporation Ltd, R&D Division, Faridabad, Haryana, India 2Indian Oil Corporation Ltd, Product Application and Development Centre, Panipat, Haryana, India *Corresponding author email: email@example.com
P-EPQ (Tetrakis(2,4-di-tert-butylphenyl)-4,4-biphenyldiphosphonite) is well known phosphorus based secondary antioxidant used in Polyolefins for stabilization. P-EPQ has a low melting point and promotes good solubility in Polyolefins. It also helps in reduction of undesired color during the processing. Biaxially Oriented Polypropylene (BOPP) film is a multilayer film and is prepared at a very high temperature and shear, it needs to be properly stabilized with primary and secondary antioxidant. Apart from the color, other properties like dyne retention and compatibility with impact copolymers are also prime requisites of the BOPP. In this paper, a method was developed for analysis of P-EPQ using HPLC. Further the effect of P-EPQ on dyne retention properties in BOPP films is discussed. A hypothesis for improvement in dyne retention has been proposed. Structural comparison of two different P-EPQ samples by HPLC was carried and their effect on properties of BOPP film was studied.
P-EPQ, BOPP Film, antioxidants, Polypropylene, dyne retention