PENGARUH MASSA GLISEROL TERHADAP TITIK LELEH PLASTIK BIODEGRADABLE DARI PATI UBI KAYU (THE GLYCEROL MASS EFFECT TOWARD MELTING POINT OF BIODEGRADABLE PLASTIC FROM WOOD CASSAVA STARCH)

Abstract

Abstrak. Plastik biodegradable berbahan pati ubi kayu dan serat batang ubi kayu telah di buat
dengan penambahan gliserol. Dalam penelitian ini bertujuan untuk mengetahui pengaruh
penambahan massa gliserol terhadap titik leleh plastik biodegradable. Pengujian titik leleh dilakukan
dengan menggunakan alat Melting block. Sejumlah kecil sampel digerus sehalus mungkin. Sampel
dimasukkan kedalam pipa kapiler hingga serbuk sampel yang ada di pipa kapiler setinggi 0,5 cm lalu
di masukkan dalam melting block. Data yang dihasilkan dalam penelitian ini menunjukkan bahwa
titik leleh tertinggi dihasilkan dari pati tanpa penambahan gliserol yaitu sebesar 221,670C. hal ini di
kuatkan dengan pengujian FTIR pada masing-masing sampel plastik sehingga menunjukkan titik
maksimum kandungan gugus OH berada pada film plastik dengan tanpa penambahan gliserol yaitu
sebesar 3130 cm-1
.
Kata Kunci: Pati ubi Kayu, Gliserol, Titik Leleh, plastik biodegradabel
Abstract. Biodegradable plastic from cassava starch and cassava stem fibers have been made with
the addition of glycerol. This study has aim to determine the effect of adding glycerol to the melting
point of the mass of biodegradable plastic. Tests were performed by using Melting block tool. A small
amount of samples was crushed as smooth as possible. Samples were added into the capillary tube
until the sample powder in the capillary tube reached 0.5 cm then included in the melting block. The
data generated in this study showed that the highest melting point of the starch produced without the
addition of glycerol in the amount of 221.670 C. This was reinforced by FTIR testing on each plastic
sample that show the point of maximum plastic content of OH groups were in plastic film without the
addition of glycerol, that was 3130 cm-1.
Keywords : Wood cassava starch, glycerol, melting point,Biodegradable plastic