Fourier Transform Infra Red Characterization of Resiprene – Polyprophylene Blend with Stearin as Compatibilizer

Abstract

The research on Fourier Transform Infra Red Characterization of Resiprene – Polyprophylene Blend with Stearin as Compatibilizer has been conducted. The Polypropylene-Resipren mixture was created by dissolving each in xylene solvent at 200 °C, followed by pressing at 170 °C in accordance with ASTM 368 M Type 4. Subsequently, its mechanical properties were characterized using a Tensile Strength Test to determine the optimum mixture. From the mechanical property characterization, the optimal mixture was found to be a combination of Polypropylene and Resipren with an 80:20 ratio (phr: phr). Next, the optimal mixture was supplemented with Stearin as a Compatibilizer with variations of 0.2; 0.4; 0.6; 0.8; and 1 phr, and its mechanical properties were re-characterized to obtain the optimal mixture, which was achieved with the addition of 0.2 phr Stearin. The FT-IR spectrum analysis of Resiprene reveals the existence of a double carbon-carbon bond, as evidenced by an absorption peak at approximately 1600 cm-1. Additionally, distinctive absorption bands for CH₃, CH₂, and –CH are observed at 2924 cm^-1 and 2723 cm^-1, respectively. In the analysis of the Polypropylene-Resipren mixture, various absorption peaks are identified, including 748.38 cm^-1, 1373-1458 cm^-1, 1651 cm^-1, 1701 cm^-1, 2723 cm^-1, 2862 cm^-1, 2924-2954 cm^-1, and 3425 cm^-1. These findings confirm the presence of the double carbon-carbon bond in Resiprene and indicate the introduction of stearin, as demonstrated by absorption peaks at 3400 cm^-1 (O-H group) and 1701 cm^-1 (carbonyl group). Furthermore, the FT-IR spectrum of the Polypropylene-Resipren-Stearin mixture exhibits persistent Resiprene features, with sharper peaks for the O-H group at 3400 cm-1 and the carbonyl group at 1701 cm^-1.

Keywords : Resiprene, Polyprophylene, Stearin, ASTM 368