成形加工
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
21 巻, 12 号
選択された号の論文の12件中1~12を表示しています
目次
巻頭言
解説:特集 クリーン化技術
技術報告
海外だより
製品・技術紹介
知りたい・見たい・訪ねたい 成形加工の元気な仲間
論文
  • 小野 和也, 山口 政之
    2009 年 21 巻 12 号 p. 745-752
    発行日: 2009年
    公開日: 2010/05/20
    ジャーナル フリー
    The effect of processing temperature in a single-screw extruder on molecular characteristics of polyethylene (PE) was studied by employing additive-free low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) for extrusion coating. It was indicated that melt elasticity is enhanced by applied extrusion processing at high temperature, suggesting that long-chain branches are generated by cross-linking reaction. On the contrary, thermal analyses revealed that there is no change in the distribution of short-chain branches by extrusion processing. Further, chain scission of PE took place predominantly above 320℃. Meanwhile at low temperature, the processing history decreased the melt elasticity. This is attributed to shear modification phenomenon.
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