Determination of spur structures using dynamic nuclear polarization and small-angle neutron scattering study, 2

Kumada, Takayuki   ; Noda, Yohei; Hashimoto, Takeji; Koizumi, Satoshi

We plan to study structures of spur, blob, and shorttrack using dynamic nuclear polarization (DNP) and small-angle neutron scattering (SANS) methods. Recently, we measured SANS profiles of proton-spin polarized polyethylenes. We found clear evidence that polarization of crystalline part of polyethylene in which paramagnetic species of TEMPO were not doped was smaller than that in amorphous part. This result indicates that DNP is useful to make gradient of spin polarization which can be measured by SANS.