PENGARUH PENAMBAHAN POLI(BUTILEN ITAKONAT) DAN POLI(BUTILEN ITAKONAT) TERSAMBUNG SILANG GLISEROL TERHADAP KARAKTER PLASTIK BIODEGRADABEL Ca- ALGINAT/ASAM STEARAT; THE EFFECT OF ADDING POLY(BUTYLENE ITACONATE) AND POLY(BUTYLENE ITACONATE) CROSS-LINKED GLYCEROL ON THE CHARACTERISTIC OF Ca-ALGINATE/STEARIC ACID BIODEGRADABLE PLASTIC

AAN FEBRIANTO, Adhitasari Suratman

2015 | Skripsi | FMIPA

A study of poly(butylene itaconate) and poly(butylene itaconate) crosslinked glycerol of Ca-Alginate stearic acid film forming. The purposes of this study are to improve physical and mechanical charasteristics of Ca-Alginate film and to compare the results between poly(butylene itaconate) and poly(butylene itaconate) cross-linked glycerol plasticizers. Ca-alginate film was prepared by casting method, i.e. the mixing of Naalginat with CaCl2 1% and plasticizer poly(butylene itaconate) or poly(butylene itaconate) cross-linked glycerol with variation of concentration 6, 9, 12, 15 and 18%(w/w) alginate and addition of stearic acid with variation of concentration 0, 5, 10, 15 and 20%(w/w) alginate to determine the optimum condition. The solution was molded and heated to 60 ºC temperature to form the film, then the film was characterized for tensile strength, elongation to break, water vapor transmission rate (WVTR), FT-IR, and biodegradation tests. The results of this study showed that Ca-alginate/stearic acid film has the better physical and mechanical characters with poly(butylene itaconate) crosslinked glycerol plasticizer. The optimum condition Ca-alginate/stearic acid film are reached with 15%(w/w) poly(butylene itaconate) cross-linked glycerol plasticizer, and stearic acid 15%(w/w) showed the results of tensile strength 10.15 MPa, 7.8% of elongation to break, and WVTR 0.59 mm g m-2 hour-1, while Caalginate/ stearic acid film with stearic acid 5%(w/w) and poly(butylene itaconate) 15%(w/w). The results of characterizations are 16.36 MPa for tensile strength, 5.89% of elongation to break and WVTR 1.26 mm g m-2 hour-1. Characterization using FT-IR showed that there was not any formation of new functional groups on the films. The result of biodegradation test showed that alginate polymer, stearic acid, poly(butylene itaconate) and poly(butylene itaconate) cross-linked glycerol as synthetic plasticizer could reduce biodegradation time.

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