Abstract
Molecular weight (degree of polymerization) of polymethylmethacrylate (PMMA) in the PMMA-grafted cotton was investigated. PMMA-grafted cotton was obtained by graft polymerization without initiator in emulsion. The PMMA was isolated from backbone polymer by acid hydrolysis, and the intrinsic viscosity was measured in acetone solution. The effect of polymerization conditions (time, type and concentration of emulsifier) on the degree of polymerization and number of PMMA branches per cellulose chain was investigated. The degree of polymerization of PMMA isolated was in the order of 104. With increasing time of polymerization, degree of polymerization increased until a maximum is attained and then decreased. The degree of polymerization and number of PMMA branches per cellulose chain were affected by the type and concentration of emulsifier.
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