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首页> 外文会议>International Conference on Deformation, Yield and Fracture of Polymers; 20000410-20040413; Cambridge; GB >TOUGHENING AND FAILURE MECHANISMS IN BLENDS OF THERMOSETS AND HYPERBRANCHED POLYMERS
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TOUGHENING AND FAILURE MECHANISMS IN BLENDS OF THERMOSETS AND HYPERBRANCHED POLYMERS

机译：热固性和超支化聚合物共混物的增韧和破坏机理

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摘要

The mechanical properties and toughening mechanisms corresponding to various processing conditions and modifier chemistries were investigated in blends of epoxy resins and dendritc hyperbranched polymers (HBP). Results showed that at fixed compositions and for every specific HBP used, temperature had an influence on blend toughness by affecting the second phase domain size. Similar trends were observed when the second phase domain diameter was increased by modifier content, although this had an additional influence on the glass transition temperature and the rigidity. Finally, a dependence of the overall thermomechanical properties on the modifier chemistry clearly showed that the solubility and the reactivity of the blend components were key parameters for the toughening mechanisms and the final properties of the blend.
机译：在环氧树脂和树枝状超支化聚合物（HBP）的混合物中研究了与各种加工条件和改性剂化学性质相对应的机械性能和增韧机理。结果表明，在固定的成分和使用的每种特定HBP下，温度都会通过影响第二相域的大小来影响共混物的韧性。当第二相畴直径通过改性剂含量增加时，观察到相似的趋势，尽管这对玻璃化转变温度和刚性有附加影响。最后，总的热机械性能对改性剂化学性质的依赖性清楚地表明，共混物组分的溶解度和反应性是增韧机理和共混物最终性能的关键参数。

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