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首页> 外文期刊>Journal of Applied Polymer Science >Effects of aging and moisture on the dynamic viscoelastic properties of oriental lacquer (urushi) film
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Effects of aging and moisture on the dynamic viscoelastic properties of oriental lacquer (urushi) film

机译：老化和水分对东方漆膜的动态粘弹性的影响

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摘要

The effects of aging and moisture on the dynamic viscoelastic properties of three oriental lacquer films were investigated. With aging over 1000 days at room temperature, the glass-transition temperature of the lacquer films (T.) shifted to higher temperatures, the maximum loss tangent (tandelta(alpha)) decreased, and the storage modulus at 20degreesC (E) increased. These changes were analogous irrespective of lacquers. With increasing moisture content, E decreased and tandelta increased at room temperature. Although the equilibrium moisture content of the virgin lacquer (sap) film was higher than that of the clear lacquer film, its E and tandelta were more stable with an increase of moisture content. It was speculated that the polysaccharides aggregated in the sap film did not effectively contribute to the mechanical properties of the film, while their hygroscopicity resulted in higher moisture content, (C) 2002 John Wiley Sons, Inc. [References: 8]
机译：研究了老化和水分对三种东方漆膜动态粘弹性的影响。随着室温下超过1000天的老化，漆膜的玻璃化转变温度（T.）转变为更高的温度，最大损耗角正切（tandeltaα）降低，在20摄氏度（E）时的储能模量增加。这些变化与上漆无关。随着水分含量的增加，室温下E降低，而tandelta升高。尽管原始漆膜（树汁）的平衡水分含量高于透明漆膜，但其E和tandelta随水分含量的增加而更加稳定。据推测，树液膜中聚集的多糖不能有效地促进膜的机械性能，而其吸湿性却导致较高的水分含量，（C）2002 John Wiley Sons，Inc. [参考文献：8]

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