Dynamics of Polyethylene Studied by High Resolution Neutron Spectrometer LAM-80ET
作者： Toshiji Kanaya , Keisuke Kaji , Kazuhiko Inoue , Susumu Ikeda , Kaoru Shibata
DOI: 10.1143/JPSJ.61.1984
关键词:
摘要: We have recently developed a high resolution quasielastic neutron scattering spectrometer LAM-80ET by applying mica crystals as analyzers and achieved of Δ e =1.3 µeV using the 002 reflection. Single chain dynamics polyethylene has been investigated below above melting temperature T m (=135°C) to show feasibility reflection analyzer. It was found that elastic intensity from decreases very steeply around . Quasielastic broadening in spectrum at Q =0.082 A -1 is observed only 210°C, which 75°C higher than From analysis spectra curve-fitting method, width component evaluated be 1.8 250°C activation energy 34 kJ/mol.
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