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首页> 外文期刊>Journal of Applied Polymer Science >Chemical Modification of Wool Fibers with Acid Anhydrides
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Chemical Modification of Wool Fibers with Acid Anhydrides

机译：酸性酸酐对羊毛纤维的化学改性

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摘要

Wool fibers were chemically modified by reaction with succinic and glutaric anhyarides.The weight gain (and acyl content) increased with increasing the reavtion temperature (65-80 deg C) and time (1-2 h),attaining 18.9% (158.9 mol/10~5 g) and 23% (163.9 mol/10~5 g) for succinylated and glutarylated wool,respectively.Changes in the amino acidic pattern of acylated wool,i.e.,decrease of basic amino acid residues and formation of ornithine,were observed by acid hydrolysis.The X-ray diffraction profiles of modified wool fibers remained essentially unchanged,suggesting that the crystalline structure was not affected by reaction with acid anhydrides.The degree of molecular orientation of acylated wool slightly decreased,especially at high weight gain.The viscoelastic response of wool modified with succinic and glutaric anhydrides was characterized by a shift to a lower temperature of both the drop of the storage modulus and the peak of the loss modulus.Thess features are indicative of a higher mobility of the keratin chians in the amorphous and crystalline domains.In fact,it is suggested that the chemical agent diffused into the accessible parts of #alpha#-crystallites,reaching the available reactive sites.This did not cause changes int he crystalline pattern of wool,but resulted in a different thermal behavior of fibers.
机译：通过与琥珀酸和戊二酸酐反应对羊毛纤维进行化学改性。随着开挖温度（65-80摄氏度）和时间（1-2小时）的增加，重量增加（和酰基含量）增加，达到18.9％（158.9 mol /琥珀酰化和戊二酰化羊毛分别为10〜5 g）和23％（163.9 mol / 10〜5 g）。观察到酰化羊毛的氨基酸模式变化，即碱性氨基酸残基减少和鸟氨酸的形成改性羊毛纤维的X射线衍射图谱基本保持不变，表明其晶体结构不受酸酐反应的影响。酰化羊毛的分子取向度略有下降，特别是在增重较高的情况下。琥珀酸和戊二酸酐改性的羊毛的粘弹性响应的特征是储能模量下降和损耗模量峰值均向较低温度转移。实际上，这表明化学试剂扩散到＃alpha＃晶体的可及部分中，到达了可用的反应位点。这没有引起晶体图案的变化。羊毛，但导致纤维的热行为不同。

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