TAGUCHI EXPERIMENTAL STUDY: THE EFFECT OF BAY LEAF EXTRACT WEIGHT PERCENTAGE AND SAMPLE SIZE ON THE CHARACTERISTICS OF POLYVINYL ALCOHOL FILMS

Hery Sunarsono; Hairul Abral; Adjar  Pratoto; Elisabeth Feberlian  Gulo; Melbi  Mahardika; Mat Uzir  Wahit; Vitri Aprila  Handayani

doi:10.23960/analit.v10i02.231

Authors

Hery Sunarsono Batam Institute of Technology
Hairul Abral Andalas University
Adjar Pratoto Andalas University
Elisabeth Feberlian Gulo Batam Institute of Technology
Melbi Mahardika BRIN
Mat Uzir Wahit Universiti Teknologi Malaysia
Vitri Aprila Handayani Batam Institute of Technology

DOI:

https://doi.org/10.23960/analit.v10i02.231

Keywords:

Analysis of Variance, Indonesian Bay Leaf, Taguchi Method, Polyvinyl Alcohol

Abstract

This research aims to determine the optimum parameters for incorporating Indonesian bay leaf extract (DS) into a polyvinyl alcohol (PVA) matrix to form a new polymer, PVA/DS. Taguchi's experimental method was employed to obtain the anti-UV properties and optimal mechanical characteristics of the PVA/DS polymer. Factors studied include DS concentration and sample size. The experimental design was prepared using an orthogonal array L16. The ability to block UV radiation (anti-UV) and the mechanical properties of polymer films are determined using UV Vis spectra and tensile testing (ASTM D638). The results of the Signal-to-Noise Ratio analysis show that the DS concentration factor is the most dominant variable in the anti-UV response, with a DS concentration influence factor (delta) value of 72.261, compared to a sample thickness of 1.605. Likewise, for elongation at break, the delta value of DS concentration is 2.43, which is higher than the cross-sectional area of 1.31. Meanwhile, for the tensile strength performance, neither factor was significant; however, the cross-sectional area factor was more dominant than the DS concentration, with a cross-sectional area delta value of 3.29, which is higher than the DS concentration of 2.77. The addition of DS concentration to the anti-UV response is able to block 100% of UV rays compared to PVA, which is only 16%. Meanwhile, for tensile strength, there was a 50.98% increase. The tensile strength of PVA/DS1 reached 75.67 MPa compared to PVA, which was only 50.12 MPa. Meanwhile, elongation at break increased by 14.71% in PVA/DS0.5 (304.43%) compared to PVA (265.40%). Thus, this research successfully applied the Taguchi method to identify the optimum factor combination with a minimum number of experiments. PVA/DS1 film (1% DS) is a film with optimum conditions that can provide superior performance, making it an alternative to conventional plastics that do not decompose easily

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