Figure 4: GPC chromatogram of methanol extract from irradiated thermosetting PU potting material. Relative MGPC peaks are 160,000, 11,000, 8,700, 5,400, 3,200 and 1,600 (monomer) by UV detection (290 nm). Peaks of 11,000, 8,700, 5,400, 3,200 and 1,600 were detectable by ECD detection (900 mY). Those of real MGPC by light-scattering detection are, respectively, 2,700, 1,740, 880, 540 and 160.