Thermal neutron spin-echo studies on dynamics of a glass-forming polymer in a high range

Kanaya, Toshiji*; Kakurai, Kazuhisa; Tsukushi, Itaru*; Inoue, Rintaro*; Watanabe, Hiroshi*; Nishi, Masakazu*; Nakajima, Kenji ; Takemura, Kazuhiro*; Furuya, Hidemine*

We performed thermal neutron spin echo measurements on a glass-forming polymer, deuterated polybutadiene (-[CD $_{2}$ -CD=CD-CD $_{2}$ ] $_{n}$ -; PB-d $_{6}$ ), in a high range up to 3.5 $AA $^{-1}$$ covering the first and second peaks of the structure factor S(), and evaluated the decay rate () of the coherent intermediate scattering function as a function of . In contrast to the previous experimental findings on the first peak of S() at = 1.5 $AA $^{-1}$$ , no "de Gennes" type narrowing was observed on the second peak at = 2.9 $AA $^{-1}$$ . This novel finding indicates that the narrowing is hidden by the distinct motions of the soft -CD $_{2}$ -CD $_{2}$ - and =CD-CD $_{2}$ - units and the self-motions of the rigid and soft units in the range around the second peak.

Language	:	English
Journal	:	Journal of the Physical Society of Japan
Volume	:	74
Number	:	12
Pages	:	p.3236 - 3240
Publication Year/Month	:	2005/12
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Paper URL	:	https://doi.org/10.1143/JPSJ.74.3236
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Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Registration No. : AA20050118
JAEA Abstracts No. : 34000152
Paper Submission No. : 298

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