Polimerisasi Butadien Secara Emulsi  

Oleh:

Sulistyo, Hary ; Rochmadi ; Wibowo, Heri Budi

Jenis: Article from Journal - ilmiah nasional
Dalam koleksi: Majalah Sains dan Teknologi Dirgantara (Fulltext) vol. 2 no. 3 (Jul. 2000), page 138-150.
Topik: Emulsion Polymerization

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: MM32.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

The objective of this research was to study emulsion polymerization of butadiene using hydrogen peroxide-Fe(II) as an initiator. This initiator was used to produce HTPB (Hydroxy Terminated Polybutadiene). The HTPB can be used as an elastomer and a solid propellant binder. The polymerization was carried out in an autoclave, equipped with a manometer, a pyrometer, a sampling valve, and a stirrer. The reaction was conducted at 5,5 atm, 28 °C, and oxygen free. The autoclave was filled with a certain amount of initiator (0,103 — 1,03 g), aerosol UT (0,1 — 0,5 g), water (300 g), and liquid butadiene (6,8 1 g). Butadiene was condensed by ethanol refrigerator.The amount of polymer product was determined by Medalia total solid method. Within the range of the experimental conditions, the increasing of temperatures, concentrations of initiator and emulsifier caused the increase of the reaction rate. Based on a ten degrees coefficient concept, the polymerization was certainly controlled by reaction rate, and that reaction rate was first order with respect to the monomer concentration. The reaction rate depended on polymer particle number (N). The polymer particle number depended on the emulsifier ([I]~) and the initiator (Cs0) concentrations, that could be expressed as: ‘P.1 r~i 0,48 g~ 0.68 L’Jo~..S0. The relation of polymerization rate constant (K’) with the temperature (T) followed Arrhenius type equation. For the composition of butadiene (6,81 g), water (300 g), Aerosol OT(0,5 g), hydrogen peroxide (1,03 g), K4Fe(CN)6.3H20 (0,02 g), and fructose (0,5 g), the relation of polymerization rate constant (K’) with the temperature, the emulsifier and the initiator concentration could be written.

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