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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Epoxy/thermoplastic blends: the effects of two different aromatic modifiers
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Epoxy/thermoplastic blends: the effects of two different aromatic modifiers

机译：环氧/热塑性共混物：两种不同芳族改性剂的作用

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摘要

In this article, a study of the properties of selected epoxy/thermoplastic blends based on the addition of two different types of aromatic modifiers is presented. The epoxy monomer used was a diglycidyl ether of biphenol A cured by 4,4'methylene bis(2,6-diethylaniline) as an amine-curing agent. One modifier was a commercial poly(2,6-dimethyl-l,4-phenylene ether or oxide) (PPE or PPO), while the other was a random copolyethersulphone synthesized in our laboratory. Several different percentages of modifiers varying from 5 to 30 wt% were considered in order to evaluate a wide spectrum of morphologies. The blends have been thoroughly characterized by parallel plate rheometry, dynamic mechanical thermal analysis (DMTA), and scanning electron microscopy (SEM). The isothermal rheology revealed some peculiar features for the blends modified by the addition of PPO as modifier. PPO bimodal mass distribution induced a two-phase separation transitions that were not observed with blends containing copolyethersulphone. All the blends presented phase-separated morphology that was clearly observed by SEM analysis. DMTA supported the results of SEM and rheology showing multi-peak behaviour in the loss tangent curves that are typical of phase-separated systems.
机译：在本文中，将基于两种不同类型的芳香族改性剂的添加，对所选环氧/热塑性共混物的性能进行研究。所用的环氧单体是双酚A的二缩水甘油醚，其通过4,4'亚甲基双（2,6-二乙基苯胺）作为胺固化剂固化。一种改性剂是市售的聚（2,6-二甲基-1,4-亚苯基醚或氧化物）（PPE或PPO），另一种改性剂是在我们的实验室中合成的无规共聚醚砜。考虑了几种不同百分比的改性剂，其变化范围为5至30 wt％，以便评估各种形态。共混物已通过平行板流变仪，动态机械热分析（DMTA）和扫描电子显微镜（SEM）进行了全面表征。等温流变学揭示了通过添加PPO作为改性剂改性的共混物的一些独特特征。 PPO双峰质量分布引起两相分离过渡，而共聚醚砜共混物则未观察到。所有共混物均表现出相分离的形态，通过SEM分析可以清楚地观察到。 DMTA支持SEM和流变学的结果，表明相分离系统的典型损耗角正切曲线具有多峰行为。

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  • 作者

    G Cicala; A Mamo; A Latteri; G Recca;

  • 作者单位

    Dipartimento di Ingegneria Industriale e Meccanica (DIIM), University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy;

    Dipartimento di Ingegneria Industriale e Meccanica, University of Catania, Catania, Italy;

    Dipartimento di Ingegneria Industriale e Meccanica, University of Catania, Catania, Italy;

    Dipartimento di Ingegneria Industriale e Meccanica, University of Catania, Catania, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    toughening agents; epoxy; rheology; viscoelasticity; blends;

    机译：增韧剂;环氧流变学粘弹性混合;

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