Pore volume determination by density of porous copolymer beads in dry state

摘要

A quick, easy and novel method to determine pore volume of porous copolymer beads on the basis of their density (d) in dry state is developed. The only apparatus required is a 10-ml measuring cylinder. The equations to calculate pore volumes are: 11.993d~2-14.03d+4.2 for styrene-divinylbenzene; 13.221d~2-15.654d + 4.7223 for 4-vinylpyridine-divinylben- zene, 5.2348d~2 - 8.0647d + 3.1612 for glycidylmethacrylate-ethleneglycoldimethacrylate, 11.365d~2 - 12.925d + 3.7972 for 4-vinylpyridine-ethyleneglycoldimethacrylate and 5.7388d~2 - 7.6575d + 2.6864 for N-vinylcarbazole-divinylbenzene. An ideally close match of pore volume calculated by these equations and the pore volume measured by mercury porosimetry Is achieved.