Graft copolymerization of granular starch maleate with acrylamide for enhancing grafting efficiency
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Zhifeng Zhu
,
Longqiu Zhang
Abstract
Graft copolymerization of granular starch maleate with acrylamide using Fenton’s initiator in aqueous dispersion was investigated for increasing grafting efficiency of the copolymerization. The graft copolymerization was characterized in terms of grafting efficiency, grafting ratio, and conversion of monomer to polymer. Effects of maleate modification of starch on the efficiency, ratio, and conversion were explored. Influences of reaction variables such as pH value, molar ratio of H2O2 to Fe2+, initiator concentration, monomer concentration, polymerization temperature, and time on the copolymerization were investigated. It was observed that the modification of starch markedly increased grafting efficiency and ratio. The graft copolymerization should be carried out under the protection of nitrogen gas at 30°C–45°C for 3 h using H2O2/Fe(NH4)2(SO4)2 as initiator. Preferred molar ratio of H2O2/Fe(NH4)2(SO4)2/anhydroglucose was 20:1:1000 and optimal value of pH was in a range of 3–4. The condition could make grafting efficiency and conversion of monomer to polymer higher than 65% and 95%, respectively.
©2011 by Walter de Gruyter Berlin Boston
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Artikel in diesem Heft
- Original Articles
- Selecting process parameter in injection molding via simulation optimization
- A multicriteria simulation optimization method for injection molding
- Approach to develop a screw configuration for compounding solid fillers on a twin screw extruder using the example of polyethylene-layered silicate masterbatches
- WIT: how to visualise, analyse, and control hollow space formationa
- Effect of the glass fiber length on the mechanical properties of long glass fiber reinforced polyphenylene sulfide
- Thermodynamic study of poly(ethylene glycol) in water/acetone solutions by viscometry
- Polymerization of N-methyl B-methyl amino borazine
- Graft copolymerization of granular starch maleate with acrylamide for enhancing grafting efficiency
- Nylon 6,12 fibers under low-dose gamma irradiation
