Hartati , Hartati (1995) Studi nitrasi selulosa pada kapas dan kapuk. Undergraduate thesis, FMIPA UNDIP.
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Abstract
Selulosa adalah polimer alam yang terdiri atas unit-unit glukosa yang berikatan 0-1,4-g1ukosida. Turunan selulosa diperoleh dari reaksi substitusi terhadap gugus hidroksil. Salah satu turunannya, yakni selulosa nitrat merupakan ester selulosa yang terbentuk dan pergantian gugus hidroksil dengan ion nitronium. Nitrasi optimum terjadi pada jumlah tertentu asam ' nitrat, asam sulfat dan air. Hasil penelitian menunjukkan bahwa perbandingan asam nitrat-asam sulfat-air adalah 1:1:2 (dalam mol). Karakterisasi selulosa nitrat dilakukan terhadap berat molekul rata-rata atas dasar viskositas (Mv), kelarutan dalam aseton dan spektrum inframerah. Cellulose is a natural polymer in which comprised of D-glucose units joined together by 0-1,4-glucosidic bond. Cellulose derivative is synthesized by substitution react toward hydroxyl group. One of this, cellulose nitrate is a cellulose ester in which the hydroxyl groups have been replaced by the nitronium ion. Optimum nitration is occured at the composition of nitric acid, sulfuric acid and water certainly. This research, a ratio of nitric acid - sulfuric acid - water is 1 : 1 : 2 ( in moles). Characterization of cellulose nitrate is carried out about viscosity average molecular weight (Mv), solubility in aceton and infrared spectrum. iv
Item Type: | Thesis (Undergraduate) |
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Subjects: | Q Science > QD Chemistry |
Divisions: | Faculty of Science and Mathematics > Department of Chemistry |
ID Code: | 30581 |
Deposited By: | Mr UPT Perpus 1 |
Deposited On: | 03 Nov 2011 07:59 |
Last Modified: | 03 Nov 2011 07:59 |
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