POLIMERISASI LARUTAN AKRILAMID DENGAN MEKANISME RADIKAL BEBAS MENGGUNAKAN METODA MIXED-SOLVENT PRECIPITATION = Free Radical Polymerization of Acrylamide using Mixed-Solvent Precipitation Method
| Main Author: | Perpustakaan UGM, i-lib |
|---|---|
| Format: | Article NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2004
|
| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/26674/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=9711 |
Daftar Isi:
- Free-radical polymerization of acrylamide using mixed-solvent precipitation method was studied by emphasizing on the kinetics aspect. Acrylamide was polymerized in methanol-water solution with potassium persulfate as initiator. Two models of polymerization can be developed based on the initiation stage. Model 1 described the first order of the initiation stage and the second order of initiation was represented by model 2. Polymerization of acrylamide was carried out batchwise in a three necked flask equipped with a stirrer, thermometer, samples device, condenser, water-bath, and heater. Methanol-water solution of acrylamide was charged into the flask and heated to the desired temperature, then the initiator potassium persulfate was introduced quickly into the reaction medium. During the process, the temperature was kept constant. Aliquots were taken from the reaction medium at a regular time then analyzed its polymer content gravirnetricaly. Variables investigated were temperature (45-60 0C), amounts of initiator (2.8.10-5-5.5.10-5 mole/mL), and monomer concentration (3.52.10-4-1.41.10-3 mole/ mL). Molecular weight was determined using viscometric method. The agitation speed was fixed at 919 rpm in all experiments. It can be concluded that both model 1 and model 2 can predict well the polymerization of acrylamide. The average error of model 1 is less than model 2. The relations between rate. Keywords : acrylamide, potassium persulfate, mixed-solvent precipitation, polymerization, the kinetics aspect