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2种乙烯丙烯酸酯橡胶的对比研究

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  • Key Words:乙烯丙烯酸酯橡胶;;相对分子质量;;玻璃化转变温度;;物理机械性能

  • Abstract:选用了美国杜邦公司生产的2个牌号的乙烯丙烯酸酯橡胶VamacG和VamacGLS,从相对分子质量、玻璃化转变温度以及物理性能等方面进行了对比研究。结果表明,与VamacG相比,VamacGLS的相对分子质量较低,相对分子质量分布较宽,玻璃化转变温度较低。炭黑填充的VamacGLS的Payne效应比VamacG明显,说明炭黑在VamacGLS中分散较差。VamacGLS生胶的门尼黏度稍低,但炭黑填充混炼胶的门尼黏度却远高于VamacG。采用相同的硫化体系时,VamacGLS的硫化程度高于VamacG。VamacGLS的硬度、定伸应力、拉伸强度以及扯断伸长率均略高于Vamac G,两者的耐热空气老化性能接近。

  • Volume:v.26

  • Issue:01

  • Translation or Not:no

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