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首页> 外文期刊>Journal of Applied Polymer Science >Effect of the fold surface of the lamellae on the behavior of the trapped radicals in irradiated polyamide-1010
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Effect of the fold surface of the lamellae on the behavior of the trapped radicals in irradiated polyamide-1010

机译：薄片折叠表面对辐照聚酰胺1010中捕获的自由基行为的影响

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摘要

Two types of macromolecular free radicals -CH2CONHCHCH2- (a) and -CH2C=O (b) trapped in irradiated Polyamide-1010 (PA1010) and PA1010 filled with neodymium oxide (Nd2O3) were characterized by an ESR approach. It was found out that a was mainly trapped in the fold surface of the lamellae and b in the amorphous phase. This result suggested that trapped radicals mainly existed in the noncrystalline phases. The effect of the fold surface area of the lamellae on the behavior of the trapped radicals are discussed in this article. Whether for the specimens with similar crystallinities but different crystallite sizes or for those with the same concentration of neodymium oxide but different crystallinities, radical a exists dominantly in a specimen with a larger fold surface area of the lamellae. Under a certain circumstance, radical a can transform into radical b for a specimen with a larger fold surface area of the lamellae. It means that the fold surface area of the lamellae plays an important role in the transformation of radical a to b. (C) 1998 John Wiley & Sons, Inc. [References: 21]
机译：利用ESR方法表征了两种类型的大分子自由基-CH2CONHCHCH2-（a）和-CH2C = O（b）捕获在充满氧化钕（Nd2O3）的辐照聚酰胺1010（PA1010）和PA1010中。发现a主要被捕获在薄片的折叠表面中，而b则被捕获在无定形相中。该结果表明，被捕获的自由基主要存在于非晶相中。本文讨论了薄片折叠表面积对被困自由基行为的影响。无论是对于具有相似结晶度但微晶尺寸不同的标本，还是对于具有相同浓度的氧化钕但具有不同结晶度的标本，自由基a主要存在于具有较大折叠表面积的标本中。在一定情况下，对于片状折叠表面积较大的样品，自由基a可以转变为自由基b。这意味着片层的折叠表面积在自由基a到b的转变中起着重要作用。 （C）1998 John Wiley＆Sons，Inc. [参考：21]

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