### 抜粋

Dynamic viscoelastic properties of standard pullulan samples with different molecular weights and narrow molecular weight distributions in ionic liquids are measured in non-entangled region over a wide range of chain overlapping (1 ≤ C [η ] ≤ 12.6) and compared with Rouse-Zimm (RZ) theory with and without introducing correction term called long time (LT) term, proposed by Osaki et al. (J. Polym. Sci., Part B, Polym. Phys. Ed., 39, 211-217, (2001)). When chains are overlapped (say 2.5 ≤ C [η ]), loss modulus data (G" ) can be well expressed by the RZ theory with experimentally determined longest relaxation time τ_{RZ} while storage modulus (G' ) was larger than the calculation. However, addition of LT term made reasonable correction for calculation of G' similar to the results for standard polystyrenes. To apply the RZ fitting for Mw estimation of unknown sample (fitting G" by RZ theory), estimation error for τ_{RZ} and resulting M_{w} are examined. At high C [η ], relative error of estimated M_{w} was about 15%, as long as t RZ can be determined with small error and coincidence of τ _{RZ} and the longest Rouse relaxation time calculated from estimated M_{w} is confirmed. At lower C [η ], this method tend to underestimate M_{w} and the error become larger.

元の言語 | 英語 |
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ページ（範囲） | 133-138 |

ページ数 | 6 |

ジャーナル | Nihon Reoroji Gakkaishi |

巻 | 45 |

発行部数 | 3 |

DOI | |

出版物ステータス | 出版済み - 1 1 2017 |

### All Science Journal Classification (ASJC) codes

- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering