成形加工
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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34 巻, 2 号
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解説 : 特集　長繊維・連続繊維強化熱可塑性樹脂
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  • 添加剤によるエチレンビニルアルコール共重合体の流動性改質および結晶化プロセスへの影響に関する研究
    前田 麻美, 徳満 勝久, 竹下 宏樹, 高野 一史
    2022 年 34 巻 2 号 p. 63-69
    発行日: 2022/01/20
    公開日: 2022/02/20
    DOIhttps://doi.org/10.4325/seikeikakou.34.63
    ジャーナル フリー
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    In this study, the melt-flow properties and/or crystallization process of Ethylene Vinyl-alcohol Copolymer (EVOH) blended with additives, namely fluorene derivative (FD) or polymethyl phenyl silane (PMPS), were investigated. When adding FD into EVOH with ethylene content of 44 and 38 mol％, the viscosity decreased in according to the added amount of FD and the ethylene content. This was due to the plasticizing effect of FD and the reduction of intermolecular hydrogen bonds among the molecules of EVOH caused by FD. Moreover, it was found that the melting /crystallization temperature decreased with the amount of FD content, resulting in delay of the crystallization process. In the case of PMPS, the apparent viscosity of EVOH also decreased in the high shear rate range, but the complex viscosity increased in the low shear rate range. Moreover, it was found that the melting point and crystallization temperature did not change with the addition of PMPS. Furthermore, the crystallization behavior of EVOH with added PMPS did not change. As a result, it was deduced that FD and PMPS were effective for modifying melt-flow properties, and that their impacts on the crystallization process of EVOH differed.

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