Glass transition temperatures of butyl acrylate-methyl methacrylate copolymers

The glass transition temperatures T-g of butyl acrylate-methyl methacrylate copolymers obtained by free radical polymerization in 3 and 5 mol/L benzen e solution have been measured using differential scanning calorimetry (DSC) and the values have been correlated using Johnston's equation with inter-i ntramolecular copolymer structure. From the data calculated with copolymer prepared at low conversion, the variation of glass transition temperature w ith copolymer conversion has been theoretically predicted. (C) 1999 John Wi ley & Sons, Inc.