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动态硫化对TPU/EVM共混物加工流变行为的影响

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  • Key Words:热塑性聚氨酯弹性体;;乙烯-醋酸乙烯酯共聚物;;动态硫化;;流变行为

  • Abstract:采用过氧化二异丙苯(DCP)对热塑性聚氨酯弹性体(TPU)/乙烯-醋酸乙烯酯共聚物(EVM)共混物实施动态硫化后,TPU/EVM共混物的表观黏度增大,非牛顿性增强,挤出胀大比增大,挤出物表面粗糙。其中TPU/EVM=75/25时,黏度增加最大,并且随剪切速率的增加其非牛顿性由硫化前的减弱变为硫化后的增强。动态硫化后,纯TPU的表观黏度增大,说明过氧化物使其发生了一定程度的交联而又使其不失热塑性。

  • Volume:v.25

  • Issue:09

  • Translation or Not:no

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