Graft copolymerization of poly(vinyl acetate) onto starch using KMnO4-H2SO4 redox system
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Baohan Qu
Abstract
The graft copolymerization of poly(vinyl acetate) [poly(VAc)] onto starch was studied using the KMnO4-H2SO4 redox system. The grafting parameters are favored by changing the concentration of KMnO4, the concentration of acid, the temperature, the time, and the concentration of monomer. A maximum graft yield of 38.3% was obtained at optimum conditions: KMnO4 concentration=3.0×10-3 mol/l, concentration of acid=1.5×10-2 mol/l, temperature=40°C, time=3 h, and concentration of monomer=1 mol/l. The grafting of poly(VAc) onto starch was confirmed by the IR spectra of pure sago starch, poly(VAc), and poly(VAc) grafted starch. Both swelling power and solubility increased with the increase in temperature. Graft copolymerization increased swelling power and reduced solubility. This material may have use as an application as a biodegradable plastic.
Gratitude is expressed to the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51003051), Science-Technology Foundation for Middle-aged and Young Scientist of Shandong Province, China (Grant No. BS2011CL021), and the High-level Talent Initial Funding for Scientific Research of Qingdao Agricultural University (Grant No. 630924) for financial support.
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Artikel in diesem Heft
- Masthead
- Masthead
- Original articles
- Heat distortion temperature of PPS/PC blend, PPS/PC nanocomposite and PPS/PC/GF hybrid nanocomposite
- Mechanical and thermal properties of impact modified PBT blends and impact modified PBT nanocomposites
- Twin screw extrusion with Expancel foaming agent
- Facile synthesis of new thermally stable and organo-soluble polyamide-imides from phosphorus-containing aromatic amines and various dianhydrides
- Graft copolymerization of poly(vinyl acetate) onto starch using KMnO4-H2SO4 redox system
- Synthesis and properties of polysiloxane graft waterborne polyurethane modified with α-N,N-dihydroxyethylaminopropyl-ω-butylpolydimethylsiloxane
- Thermal, mechanical and tribological properties of polycarbonate/acrylonitrile-butadiene-styrene blends
- Thermal conductivity and electrical conductivity of silicone rubber filled with aluminum nitride and aluminum powder
- Individual and combined effects of modified starch, bentonite and their composite powder with HPMC on the performance of cement mortars
- Optical characteristics of injection-molded fluorene polymers
- Novel epoxy resin composites containing polyaniline coated short kenaf bast fibers and polyaniline nanowires: mechanical and electrical properties
