2009Chemical Industry and EngineeringRequires access

Synthesis of Sodium Polyacrylate with Low Molecular Weight

Jun Gao

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Abstract

In this paper,low molecular weight of sodium polyacrylate was synthesized with(NH_4)_2S_2O_8-NaHSO_3 as initiator and NaHSO_3 as chain transfer agent.The influences,such as the concentrations of monomer,initiator and chain transfer agent,the temperature and time of polymerization,on the molecular weight of polymer were discussed.The results showed that low molecular weight of sodium polyacrylate(about 2000—3000)can be polymerized at 75 ℃ for 6.0 h,with the monomer concentration of 25%—30%,the initiator concentration of 0.40%—0.60%,the chain transfer agent concentration of 4%—5%.The conversion of the monomer is above 95%.

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What this paper is about

In this paper,low molecular weight of sodium polyacrylate was synthesized with(NH_4)_2S_2O_8-NaHSO_3 as initiator and NaHSO_3 as chain transfer agent.The influences,such as the concentrations of monomer,initiator and chain transfer agent,the temperature and time of polymerization,on the molecular weight of polymer were discussed.The results showed that low molecular weight of sodium polyacrylate(about 2000—3000)can be polymerized at 75 ℃ for 6.0 h,with the monomer concentration of 25%—30%,the initiator concentration of 0.40%—0.60%,the chain transfer agent concentration of 4%—5%.The conversion of the monomer is above 95%.

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Available abstract

In this paper,low molecular weight of sodium polyacrylate was synthesized with(NH_4)_2S_2O_8-NaHSO_3 as initiator and NaHSO_3 as chain transfer agent.The influences,such as the concentrations of monomer,initiator and chain transfer agent,the temperature and time of polymerization,on the molecular weight of polymer were discussed.The results showed that low molecular weight of sodium polyacrylate(about 2000—3000)can be polymerized at 75 ℃ for 6.0 h,with the monomer concentration of 25%—30%,the initiator concentration of 0.40%—0.60%,the chain transfer agent concentration of 4%—5%.The conversion of the monomer is above 95%.

Key concepts: Sodium polyacrylate, Monomer, Chemistry, Polymerization, Polymer chemistry, Sodium, Polymer, Chain transfer

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