J053013 架橋を有するアモルファスポリマー材料における熱輸送機構の解明(〔J053-01〕マイクロ・ナノスケールの熱流体現象(1))

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タイトル別名
  • J053013 Heat Conduction Mechanism on Amorphous Polymer Materials with Crosslinking

抄録

In the present study, molecular dynamics (MD) simulations on two typical amorphous polymers, polyethylene (PE) and polystyrene (PS) were performed in order to elucidate the effect of crosslinks between polymer chains on heat conduction. Direct nonequilibrium MD techniques were used to evaluate thermal conductivities in both polymeric systems with varying a crosslink concentration. In the PE systems, the effect of crosslinking on thermal conductivity is significant and the thermal conductivity more or less linearly increases with the crosslink concentration. On the other hand, the change of thermal conductivity in the PS systems is insignificant. We guess that this striking difference is due to highly heterogeneous PS based network including phenyl side groups in terms of molecular interactions and molecular conformation. In order to elucidate the molecular-scale mechanism on the increase of thermal conductivity with the crosslink concentration for PE, we monitored microscopic energy transfer modes associated with various bonded and non-bonded interactions. The results show that crosslinking plays a role in creating new thermal paths to increase thermal conductivity.

収録刊行物

  • 年次大会

    年次大会 2013 (0), _J053013-1-_J053013-5, 2013

    一般社団法人 日本機械学会

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