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首页> 外文期刊>Journal of Applied Polymer Science >Toughening of epoxy resin blended with thermotropic hydroxyethyl cellulose acetate
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Toughening of epoxy resin blended with thermotropic hydroxyethyl cellulose acetate

机译：环氧树脂与热塑性羟乙基纤维素乙酸酯的增韧

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Thermotropic hydroxyethyl cellulose acetate (HECA) was totally miscible with uncured epoxy resin, and the miscibility was not influenced by the degree of substitution (DS) of HECA. When the epoxy resin was cured with diamine (DDA), HECA became immiscible with the epoxy resin matrix, and a heterogeneous system was formed. Epoxy resin existed as a constant phase, and HECA-rich domains were dispersed in the matrix with dimensions of about 0.2-0.5 mu m. Epoxy resin could be toughened by HECA, and the impact strength of the epoxy resin blends with 10 wt % HECA was the maximum. HECA exhibited the highest toughening ability when the epoxy resin was cured at the temperature at which the HECA existed as a liquid crystalline state. The toughening ability was also influenced by the degree of substitution for acetyl of HECA, and the impact strength of the epoxy resin blends decreased with increasing the DS for acetyl of HECA. (C) 1998 John Wiley & Sons, Inc. [References: 11]
机译：热塑性羟乙基纤维素乙酸酯（HECA）可以与未固化的环氧树脂完全混溶，并且混溶性不受HECA的取代度（DS）的影响。当用二胺（DDA）固化环氧树脂时，HECA与环氧树脂基体不混溶，形成异质体系。环氧树脂以恒定相存在，富含HECA的区域分散在基质中，尺寸约为0.2-0.5μm。环氧树脂可以通过HECA增韧，与10 wt％HECA的环氧树脂共混物的冲击强度最大。当在HECA以液晶状态存在的温度下固化环氧树脂时，HECA表现出最高的增韧能力。增韧能力还受HECA乙酰基取代度的影响，并且环氧树脂共混物的冲击强度随HECA乙酰基DS的增加而降低。 （C）1998 John Wiley＆Sons，Inc. [参考：11]

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