Graft copolymerization of poly(vinyl acetate) onto starch using KMnO4-H2SO4 redox system

Abstract

The graft copolymerization of poly(vinyl acetate) [poly(VAc)] onto starch was studied using the KMnO 4 -H 2 SO 4 redox system. The grafting parameters are favored by changing the concentration of KMnO 4 , 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: KMnO 4 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.

Effect of glutaraldehyde on thermal and mechanical properties of starch and polyvinyl alcohol blends

“…Starch is a relatively inexpensive and renewable product that can be obtained from multiple plant sources and that has been extensively used as a wood adhesive [1,2]. However, its bonding capacity is not strong enough to glue wood [3][4][5][6][7]. A few studies have been conducted on the potential of utilizing starch as wood adhesive.…”

Study on Various Compositions of Polyvinyl Alcohol and Starch Blends by Cross-Linking with Glyoxal

“…Starch is a relatively inexpensive and renewable product that can be obtained from multiple plant sources and that has been extensively used as wet end additive, coating binder, sizing agent, adhesive, and textile size [1] [2]. However, its bonding capacity is not strong enough to glue wood [3] [4] [5] [6] [7]. A few studies have been conducted on the potential of utilizing starch as wood adhesive.…”

Starch Stabilized Polyvinyl Acetate Emulsion: Review

“…Starch is a relatively inexpensive, renewable and bio-degradable product that can be obtained from multiple plant sources and that had been extensively used as wet end additive, coating binder, sizing agent, adhesive, and textile size [9,10]. However, its bonding capacity was not strong enough to glue wood [11–15]. A few studies had been conducted on the potential of utilizing starch as wood adhesive.…”